Question

我想要一个具有相同风格的UITableView组，如 iOS 7 的iPad设置应用详细信息视图。

这是一个带圆角的tableView。请查看附件了解详情。

是否有一些默认设置使它看起来像那样，或者我们需要为它做一些自定义绘图。

任何正确方向的提示都将受到赞赏。

由于

enter image description here

Answer 1

我已经进一步定制了willDisplayCell，以便在设置应用中更好地模拟单元格样式。

<强>目标C

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(tintColor)]) {
        if (tableView == self.tableView) {
            CGFloat cornerRadius = 5.f;
            cell.backgroundColor = UIColor.clearColor;
            CAShapeLayer *layer = [[CAShapeLayer alloc] init];
            CGMutablePathRef pathRef = CGPathCreateMutable();
            CGRect bounds = CGRectInset(cell.bounds, 10, 0);
            BOOL addLine = NO;
            if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
                CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
            } else if (indexPath.row == 0) {
                CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
                CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
                addLine = YES;
            } else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
                CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
                CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
            } else {
                CGPathAddRect(pathRef, nil, bounds);
                addLine = YES;
            }
            layer.path = pathRef;
            CFRelease(pathRef);
            layer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor;

            if (addLine == YES) {
                CALayer *lineLayer = [[CALayer alloc] init];
                CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
                lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight);
                lineLayer.backgroundColor = tableView.separatorColor.CGColor;
                [layer addSublayer:lineLayer];
            }
            UIView *testView = [[UIView alloc] initWithFrame:bounds];
            [testView.layer insertSublayer:layer atIndex:0];
            testView.backgroundColor = UIColor.clearColor;
            cell.backgroundView = testView;
        }
    }
}

<强>夫特

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    if (cell.respondsToSelector(Selector("tintColor"))){
        if (tableView == self.tableView) {
            let cornerRadius : CGFloat = 12.0
            cell.backgroundColor = UIColor.clearColor()
            var layer: CAShapeLayer = CAShapeLayer()
            var pathRef:CGMutablePathRef = CGPathCreateMutable()
            var bounds: CGRect = CGRectInset(cell.bounds, 25, 0)
            var addLine: Bool = false

            if (indexPath.row == 0 && indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1) {
                CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius)
            } else if (indexPath.row == 0) {
                CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds))
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius)
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius)
                CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))
                addLine = true
            } else if (indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1) {
                CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds))
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius)
                CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius)
                CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds))
            } else {
                CGPathAddRect(pathRef, nil, bounds)
                addLine = true
            }

            layer.path = pathRef
            layer.fillColor = UIColor(red: 255/255.0, green: 255/255.0, blue: 255/255.0, alpha: 0.8).CGColor

            if (addLine == true) {
                var lineLayer: CALayer = CALayer()
                var lineHeight: CGFloat = (1.0 / UIScreen.mainScreen().scale)
                lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight)
                lineLayer.backgroundColor = tableView.separatorColor.CGColor
                layer.addSublayer(lineLayer)
            }
            var testView: UIView = UIView(frame: bounds)
            testView.layer.insertSublayer(layer, atIndex: 0)
            testView.backgroundColor = UIColor.clearColor()
            cell.backgroundView = testView
        }
    }
}

Swift 3

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    let cornerRadius: CGFloat = 5
    cell.backgroundColor = .clear

    let layer = CAShapeLayer()
    let pathRef = CGMutablePath()
    let bounds = cell.bounds.insetBy(dx: 20, dy: 0)
    var addLine = false

    if indexPath.row == 0 && indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
    } else if indexPath.row == 0 {
        pathRef.move(to: .init(x: bounds.minX, y: bounds.maxY))
        pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.minY), tangent2End: .init(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
        pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.minY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
        pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.maxY))
        addLine = true
    } else if indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        pathRef.move(to: .init(x: bounds.minX, y: bounds.minY))
        pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.maxY), tangent2End: .init(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
        pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.maxY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
        pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.minY))
    } else {
        pathRef.addRect(bounds)
        addLine = true
    }

    layer.path = pathRef
    layer.fillColor = UIColor(white: 1, alpha: 0.8).cgColor

    if (addLine == true) {
        let lineLayer = CALayer()
        let lineHeight = 1.0 / UIScreen.main.scale
        lineLayer.frame = CGRect(x: bounds.minX + 10, y: bounds.size.height - lineHeight, width: bounds.size.width - 10, height: lineHeight)
        lineLayer.backgroundColor = tableView.separatorColor?.cgColor
        layer.addSublayer(lineLayer)
    }

    let testView = UIView(frame: bounds)
    testView.layer.insertSublayer(layer, at: 0)
    testView.backgroundColor = .clear
    cell.backgroundView = testView
}

Swift 4.2

override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

    if (cell.responds(to: #selector(getter: UIView.tintColor))){
        if tableView == self.tableView {
            let cornerRadius: CGFloat = 12.0
            cell.backgroundColor = .clear
            let layer: CAShapeLayer = CAShapeLayer()
            let path: CGMutablePath = CGMutablePath()
            let bounds: CGRect = cell.bounds
            bounds.insetBy(dx: 25.0, dy: 0.0)
            var addLine: Bool = false

            if indexPath.row == 0 && indexPath.row == ( tableView.numberOfRows(inSection: indexPath.section) - 1) {
                path.addRoundedRect(in: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)

            } else if indexPath.row == 0 {
                path.move(to: CGPoint(x: bounds.minX, y: bounds.maxY))
                path.addArc(tangent1End: CGPoint(x: bounds.minX, y: bounds.minY), tangent2End: CGPoint(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
                path.addArc(tangent1End: CGPoint(x: bounds.maxX, y: bounds.minY), tangent2End: CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
                path.addLine(to: CGPoint(x: bounds.maxX, y: bounds.maxY))

            } else if indexPath.row == (tableView.numberOfRows(inSection: indexPath.section) - 1) {
                path.move(to: CGPoint(x: bounds.minX, y: bounds.minY))
                path.addArc(tangent1End: CGPoint(x: bounds.minX, y: bounds.maxY), tangent2End: CGPoint(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
                path.addArc(tangent1End: CGPoint(x: bounds.maxX, y: bounds.maxY), tangent2End: CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
                path.addLine(to: CGPoint(x: bounds.maxX, y: bounds.minY))

            } else {
                path.addRect(bounds)
                addLine = true
            }

            layer.path = path
            layer.fillColor = UIColor.white.withAlphaComponent(0.8).cgColor

            if addLine {
                let lineLayer: CALayer = CALayer()
                let lineHeight: CGFloat = 1.0 / UIScreen.main.scale
                lineLayer.frame = CGRect(x: bounds.minX + 10.0, y: bounds.size.height - lineHeight, width: bounds.size.width, height: lineHeight)
                lineLayer.backgroundColor = tableView.separatorColor?.cgColor
                layer.addSublayer(lineLayer)
            }

            let testView: UIView = UIView(frame: bounds)
            testView.layer.insertSublayer(layer, at: 0)
            testView.backgroundColor = .clear
            cell.backgroundView = testView
        }
    }
}

Example on iOS7

Answer 2

回答@NarasimhaiahKolli，关于我如何设置单元格的背景视图，以便整个单元格看起来不像它突出显示。希望这会有所帮助。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    InfoCell *cell;
    ...

    if ([cell respondsToSelector:@selector(tintColor)]) {
        cell.selectedBackgroundView = [self backgroundCellView:cell indexPath:indexPath tableView:tableView];
    }

    return cell;
}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(tintColor)]) {
        cell.backgroundColor = UIColor.clearColor;
        UIColor *cellColor = [UIColor colorWithWhite:0.90f alpha:.95f];
        CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:cellColor];

        CGRect bounds = CGRectInset(cell.bounds, 10, 0);

        UIView *testView = [[UIView alloc] initWithFrame:bounds];
        [testView.layer insertSublayer:layer atIndex:0];
        testView.backgroundColor = UIColor.clearColor;
        cell.backgroundView = testView;
    }
}

- (UIView *)backgroundCellView:(InfoCell *)cell indexPath:(NSIndexPath *)indexPath tableView:(UITableView *)tableView
{
    UIColor *cellColor = [UIColor lightGrayColor];
    CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:cellColor];

    CGRect bounds = CGRectInset(cell.bounds, 10, 0);
    UIView *testView = [[UIView alloc] initWithFrame:bounds];
    [testView.layer insertSublayer:layer atIndex:0];
    return testView;
}

- (CAShapeLayer *)tableView:(UITableView *)tableView layerForCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath withColor:(UIColor *)color
{
    CGFloat cornerRadius = 5.f;
    CAShapeLayer *layer = [[CAShapeLayer alloc] init];
    CGMutablePathRef pathRef = CGPathCreateMutable();
    CGRect bounds = CGRectInset(cell.bounds, 10, 0);
    BOOL addLine = NO;
    if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
        CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
    } else if (indexPath.row == 0) {
        CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
        CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
        addLine = YES;
    } else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
        CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
        CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
    } else {
        CGPathAddRect(pathRef, nil, bounds);
        addLine = YES;
    }
    layer.path = pathRef;
    CFRelease(pathRef);
    //        layer.fillColor = [UIColor colorWithWhite:1.f alpha:1.0f].CGColor;
    layer.fillColor = color.CGColor;

    if (addLine == YES) {
        CALayer *lineLayer = [[CALayer alloc] init];
        CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
        lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight);
        lineLayer.backgroundColor = tableView.separatorColor.CGColor;
        [layer addSublayer:lineLayer];
    }

    return layer;
}

Answer 3

@jvanmetre的答案很棒，而且很有效。建立在它之上，并在评论中由@SergiySalyuk建议。我已经更新代码以使用UIBezierPath，而不是让它更容易理解，而且速度更快。

我的版本还修复了分隔符错误，并添加了适合单元格的选定背景视图。

请务必将您的表格视图设置为无分隔符：tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

<强>目标C

- (void)tableView:(UITableView*)tableView willDisplayCell:(UITableViewCell*)cell forRowAtIndexPath:(NSIndexPath*)indexPath {
  // Set transparent background so we can see the layer
  cell.backgroundColor = UIColor.clearColor;

  // Declare two layers: one for the background and one for the selecetdBackground
  CAShapeLayer *backgroundLayer = [CAShapeLayer layer];
  CAShapeLayer *selectedBackgroundLayer = [[CAShapeLayer alloc] init];

  CGRect bounds = CGRectInset(cell.bounds, 0, 0);//Cell bounds feel free to adjust insets.

  BOOL addSeparator = NO;// Controls if we should add a seperator

  // Determine which corners should be rounded
  if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
    // This is the only row in its section, round all corners
    backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(7, 7)].CGPath;

  } else if (indexPath.row == 0) {
    // First row, round the top two corners.
    backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(7, 7)].CGPath;
    addSeparator = YES;

  } else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
    // Bottom row, round the bottom two corners.
    backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(7, 7)].CGPath;

  } else {
    // Somewhere between the first and last row don't round anything but add a seperator
    backgroundLayer.path = [UIBezierPath bezierPathWithRect:bounds].CGPath;// So we have a background
    addSeparator = YES;
  }

  // Copy the same path for the selected background layer
  selectedBackgroundLayer.path = CGPathCreateCopy(backgroundLayer.path);

  // Yay colors!
  backgroundLayer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor;
  selectedBackgroundLayer.fillColor = [UIColor grayColor].CGColor;

  // Draw seperator if necessary
  if (addSeparator == YES) {
    CALayer *separatorLayer = [CALayer layer];
    CGFloat separatorHeight = (1.f / [UIScreen mainScreen].scale);
    separatorLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-separatorHeight, bounds.size.width-10, separatorHeight);
    separatorLayer.backgroundColor = tableView.separatorColor.CGColor;

    [backgroundLayer addSublayer:separatorLayer];
  }

  // Create a UIView from these layers and set them to the cell's .backgroundView and .selectedBackgroundView
  UIView *backgroundView = [[UIView alloc] initWithFrame:bounds];
  [backgroundView.layer insertSublayer:backgroundLayer atIndex:0];
  backgroundView.backgroundColor = UIColor.clearColor;
  cell.backgroundView = backgroundView;

  UIView *selectedBackgroundView = [[UIView alloc] initWithFrame:bounds];
  [selectedBackgroundView.layer insertSublayer:selectedBackgroundLayer atIndex:0];
  selectedBackgroundView.backgroundColor = UIColor.clearColor;
  cell.selectedBackgroundView = selectedBackgroundView;

}

Answer 4

在iOS 13及更高版本中，Apple终于可以使用新的UITableView.Style.insetGrouped表格视图样式来提供这种表格样式，而无需重新设计。

在Xcode 11及更高版本中，可以通过为“样式”选择“分组插入”在界面视图的界面构建器设置中进行设置：

Answer 5

我试图在tableviewcells上实现相同的设置应用程序圆形外观。我的回答也是基于how to set cornerRadius for only top-left and top-right corner of a UIView?的答案。

enter image description here

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    [cell setClipsToBounds:YES];

    // rowsArray has cell titles for current group
    NSArray *rowsArray = [self.sectionsArray objectAtIndex:indexPath.section];

    [[cell textLabel] setText:[rowsArray objectAtIndex:indexPath.row]];

    float cornerSize = 11.0; // change this if necessary

    // round all corners if there is only 1 cell
    if (indexPath.row == 0 && [rowsArray count] == 1) {
        UIBezierPath *maskPath;
        maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight | UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];

        CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
        mlayer.frame = cell.bounds;
        mlayer.path = maskPath.CGPath;
        cell.layer.mask = mlayer;
    }

    // round only top cell and only top-left and top-right corners
    else if (indexPath.row == 0) {
        UIBezierPath *maskPath;
        maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];

        CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
        mlayer.frame = cell.bounds;
        mlayer.path = maskPath.CGPath;
        cell.layer.mask = mlayer;
    }

    // round bottom-most cell of group and only bottom-left and bottom-right corners
    else if (indexPath.row == [rowsArray count] - 1) {
        UIBezierPath *maskPath;
        maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];

        CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
        mlayer.frame = cell.bounds;
        mlayer.path = maskPath.CGPath;
        cell.layer.mask = mlayer;

    }

}

Answer 6

在这里尝试了一些答案后，我决定全力以赴并在UITableView和UITableViewCell之上实现整个子类，以在iOS 7中复制圆形分组表视图样式。

https://github.com/TimOliver/TORoundedTableView

最终成为一个非常复杂的过程：

我必须在layoutSubviews中继承UITableView以重新布局每个单元格和附件视图，使它们不再是边缘到边缘。
我必须继承UITableViewCell，以便删除顶部和底部分隔符的发际线视图（但保留部分内部的视图不变）。
然后，我创建了一个自定义UITableViewCell背景视图，可以选择在顶部和底部有圆角，用于每个部分中的第一个和最后一个单元格。这些元素必须为CALayer，以避免UITableView在用户点击单元格时更改背景视图颜色的隐式行为。
因为他们现在是CALayer个不响应layoutSubviews的实例，所以我不得不做一些核心动画修补，以确保顶部和底部单元格的调整大小与用户旋转设备时的其他单元格。

总而言之，它可以做到，但是因为它需要相当多的努力并且花费少量的性能（因为它不断地与Apple的代码进行斗争，试图设置一切都回来了，最好向Apple提出雷达，要求他们正式公开这种风格。在此之前，请随意使用我的图书馆。：）

Answer 7

我创建了一个名为addRoundedCornersWithRadius:(CGFloat)radius ForCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath的方法，它会在每个部分的顶部和底部创建圆角。

使用maskView UITableViewCell属性的好处是，当您选择单元格时，圆角仍然可见。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier"];
    [cell.textLabel setText:[NSString stringWithFormat:@"Row %d in Section %d", indexPath.row, indexPath.section]];
    [tableView addRoundedCornersWithRadius:12.0f ForCell:cell atIndexPath:indexPath];
    return cell;
}

- (void)addRoundedCornersWithRadius:(CGFloat)radius ForCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
    NSInteger MBRows = [self numberOfRowsInSection:indexPath.section] - 1;
    CAShapeLayer    *MBLayer = [[CAShapeLayer alloc] init];
    CGRect cellBounds = CGRectMake(0, 0, self.bounds.size.width, cell.bounds.size.height);

    BOOL shouldAddSeperator = NO;

    if (indexPath.row == 0 && indexPath.row == MBRows) {
        [MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds cornerRadius:radius].CGPath];
    } else if (indexPath.row == 0) {
        [MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds
                                               byRoundingCorners:(UIRectCornerTopLeft|UIRectCornerTopRight)
                                                     cornerRadii:CGSizeMake(radius, radius)].CGPath];
        shouldAddSeperator = YES;
    } else if (indexPath.row == MBRows) {
        [MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds
                                               byRoundingCorners:(UIRectCornerBottomLeft|UIRectCornerBottomRight)
                                                     cornerRadii:CGSizeMake(radius, radius)].CGPath];
    } else {
        [MBLayer setPath:[UIBezierPath bezierPathWithRect:cell.bounds].CGPath];
        shouldAddSeperator = YES;
    }

    [cell setMaskView:[[UIView alloc] initWithFrame:cell.bounds]];
    [cell.maskView.layer insertSublayer:MBLayer atIndex:0];

    if (shouldAddSeperator == YES) {
        CGFloat seperator = (1.0f / [UIScreen mainScreen].scale);
        CALayer *cellSeperator = [[CALayer alloc] init];

        [cellSeperator setFrame:CGRectMake(15.0f, cell.bounds.size.height - seperator, cell.bounds.size.width - 15.0f, seperator)];
        [cellSeperator setBackgroundColor:self.separatorColor.CGColor];
        [cell.layer addSublayer:cellSeperator];
    }

    [cell.maskView.layer setMasksToBounds:YES];
    [cell setClipsToBounds:YES];
}

Answer 8

我的回答可能为时已晚，但对于Swift版本（任何版本），它肯定会非常有用并且非常容易使用。

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
        if (tableView == self.tableViewMovies) {
            //Top Left Right Corners
            let maskPathTop = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
            let shapeLayerTop = CAShapeLayer()
            shapeLayerTop.frame = cell.bounds
            shapeLayerTop.path = maskPathTop.cgPath

            //Bottom Left Right Corners
            let maskPathBottom = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.bottomLeft, .bottomRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
            let shapeLayerBottom = CAShapeLayer()
            shapeLayerBottom.frame = cell.bounds
            shapeLayerBottom.path = maskPathBottom.cgPath

            if (indexPath as NSIndexPath).section == 0 {
                if indexPath.row == 0 {
                    cell.layer.mask = shapeLayerTop
                }else if indexPath.row == 2 {
                    cell.layer.mask = shapeLayerBottom
                }
            }else if (indexPath as NSIndexPath).section == 1 {
                if indexPath.row == 0 {
                    cell.layer.mask = shapeLayerTop
                }else {
                    cell.layer.mask = shapeLayerBottom
                }
            }else if (indexPath as NSIndexPath).section == 2 {
                if indexPath.row == 0 {
                    cell.layer.mask = shapeLayerTop
                }else if indexPath.row == 2 {
                    cell.layer.mask = shapeLayerBottom
                }
            }
        }
    }

PS：我使用了以下Swift 3.0代码。

Answer 9

 func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath)
{
    if (tableView == self.orderDetailsTableView)
    {
        //Top Left Right Corners
        let maskPathTop = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.TopLeft, .TopRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
        let shapeLayerTop = CAShapeLayer()
        shapeLayerTop.frame = cell.bounds
        shapeLayerTop.path = maskPathTop.CGPath

        //Bottom Left Right Corners
        let maskPathBottom = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.BottomLeft, .BottomRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
        let shapeLayerBottom = CAShapeLayer()
        shapeLayerBottom.frame = cell.bounds
        shapeLayerBottom.path = maskPathBottom.CGPath

        //All Corners
        let maskPathAll = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.TopLeft, .TopRight, .BottomRight, .BottomLeft], cornerRadii: CGSize(width: 5.0, height: 5.0))
        let shapeLayerAll = CAShapeLayer()
        shapeLayerAll.frame = cell.bounds
        shapeLayerAll.path = maskPathAll.CGPath

        if (indexPath.row == 0 && indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1)
        {
            cell.layer.mask = shapeLayerAll
        }
     else if (indexPath.row == 0)
        {
        cell.layer.mask = shapeLayerTop
        }
        else if (indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1)
        {
            cell.layer.mask = shapeLayerBottom
        }
    }
}

swift的工作代码...... 实际上我们正在做的是如果section只有一行然后我们在所有方面都这样做，如果section有多行，那么我们在第一行顶部和最后一行底部执行...属性BottomLeft，BottomRight，topLeft，TopRight应该是rect corner类型（当您输入时来自xcode的建议...还有另一个具有相同名称的属性内容角..所以检查一下）

Answer 10

我担心似乎没有一种简单的方法可以做到这一点。你必须自定义你的UITableViewCell，就像这样： enter image description here

将tableView的样式设置为分组。

将TableView背景颜色设置为清晰颜色。

在你的 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)上清除单元格背景并创建一个带有所需圆角作为背景的UIView。像这样：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];

    if(cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
    }

    [cell setBackgroundColor:[UIColor clearColor]];

    UIView *roundedView = [[UIView alloc] initWithFrame:cell.frame];
    [roundedView setBackgroundColor:[UIColor whiteColor]];
    roundedView.layer.cornerRadius = 10.0;
    [[cell contentView] addSubview:roundedView];


    return cell;
}

您可能需要进行一些进一步的抛光，但这是主要的想法。

Answer 11

我想实现相同但每个部分周围都有边框（iOS6中的行）。由于我没有找到建议解决方案的简单修改，我想出了自己的解决方案。这是@Roberto Ferraz在this主题中给出的答案的修改。我创建了一个继承自UITableViewCell的自定义类。在其中我添加了一个具有适当大小的容器视图（在我的情况下，在两侧收缩15px）。比在课堂上我做到了这一点：

- (void)layoutSubviews
{
    [super layoutSubviews];

    CGFloat cornerRadius = 10.0f;

    self.vContainerView.layer.cornerRadius = cornerRadius;
    self.vContainerView.layer.masksToBounds = YES;
    self.vContainerView.layer.borderWidth = 1.0f;

    if (self.top && self.bottom)
    {
        // nothing to do - cell is initialized in prepareForReuse
    }
    else if (self.top)
    {
        // cell is on top - extend height to hide bottom line and corners
        CGRect frame = self.vContainerView.frame;
        frame.size.height += cornerRadius;
        self.vContainerView.frame = frame;

        self.vSeparatorLine.hidden = NO;
    }
    else if (self.bottom)
    {
        // cell is on bottom - extend height and shift container view up to hide top line and corners
        CGRect frame = self.vContainerView.frame;
        frame.size.height += cornerRadius;
        frame.origin.y -= cornerRadius;
        self.vContainerView.frame = frame;

        self.vSeparatorLine.hidden = YES;
    }
    else
    {
        // cell is in the middle - extend height twice the height of corners and shift container view by the height of corners - therefore hide top and bottom lines and corners.
        CGRect frame = self.vContainerView.frame;
        frame.size.height += (2 * cornerRadius);
        frame.origin.y -= cornerRadius;
        self.vContainerView.frame = frame;

        self.vSeparatorLine.hidden = NO;
    }
}

- (void)prepareForReuse
{
    // establish original values when cell is reused
    CGRect frame = self.vBorderView.frame;
    frame.size.height = BORDER_VIEW_HEIGHT;
    frame.origin.y = 0;
    self.vBorderView.frame = frame;

    self.vSeparatorLine.hidden = YES;
}

然后在您的数据源中执行此操作：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ...

    // only one cell in section - must be rounded on top & bottom
    if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
    {
        cell.top    = YES;
        cell.bottom = YES;
    }
    // first cell - must be rounded on top
    else if (indexPath.row == 0)
    {
        cell.top    = YES;
        cell.bottom = NO;
    }
    // last cell - must be rounded on bottom
    else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
    {
        cell.top    = NO;
        cell.bottom = YES;
    }
    else
    {
        cell.top    = NO;
        cell.top    = NO;
    }

    return cell;
}

瞧 - 你的部分有圆角和边框。

希望这有帮助！

P.S。我做了一些编辑，因为我在原始代码中发现了一些错误 - 主要是我没有在所有情况下设置所有值，这会在重复使用单元格时产生一些非常惊人的效果：）

Answer 12

添加此项以删除tableview中的第一行 self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

Answer 13

迅捷4 如果您还想添加部分标题，请尝试以下一个

将cornerLayerWidth声明为全局变量

var cornerLayerWidth：CGFloat = 0.0

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    let cornerRadius: CGFloat = 10
    cell.backgroundColor = .clear

    let layer = CAShapeLayer()
    let pathRef = CGMutablePath()
    let bounds = cell.bounds.insetBy(dx: 0, dy: 0)
    cornerLayerWidth = bounds.width
    var addLine = false



    if indexPath.row == 0 && indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
    }
    else if indexPath.row == 0 {


    }
    else if indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        pathRef.move(to: .init(x: bounds.minX, y: bounds.minY))
        pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.maxY), tangent2End: .init(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
        pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.maxY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
        pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.minY))
    } else {
        pathRef.addRect(bounds)
        addLine = true
    }

    layer.path = pathRef
    layer.fillColor = UIColor(white: 1, alpha: 1).cgColor

    if (addLine == true) {
        let lineLayer = CALayer()
        let lineHeight = 1.0 / UIScreen.main.scale
        lineLayer.frame = CGRect(x: bounds.minX, y: bounds.size.height - lineHeight, width: bounds.size.width , height: lineHeight)
        lineLayer.backgroundColor = tableView.separatorColor?.cgColor
        layer.addSublayer(lineLayer)
    }

    let testView = UIView(frame: bounds)
    testView.layer.insertSublayer(layer, at: 0)
    testView.backgroundColor = .clear
    cell.backgroundView = testView
}

和

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {

    let cell = tableView.dequeueReusableCell(withIdentifier: "eMPOIListHeaderViewCell") as! eMPOIListHeaderViewCell

    let cornerRadius: CGFloat = 10

    let layer = CAShapeLayer()
    let pathRef = CGMutablePath()
    let bounds =  CGRect(x: 0, y: 0, width: cornerLayerWidth, height: 50)//cell.bounds.insetBy(dx: 0, dy: 0)

    pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)

    pathRef.move(to: .init(x: bounds.minX, y: bounds.maxY))
    pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.minY), tangent2End: .init(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
    pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.minY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
    pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.maxY))



    layer.path = pathRef
    layer.fillColor = UIColor(white: 1, alpha: 1).cgColor

         let lineLayer = CALayer()
        let lineHeight = 1.0 / UIScreen.main.scale
        lineLayer.frame = CGRect(x: bounds.minX, y: bounds.size.height - lineHeight, width: bounds.size.width , height: lineHeight)
        lineLayer.backgroundColor = tableView.separatorColor?.cgColor
        layer.addSublayer(lineLayer)

    let testView = UIView(frame: bounds)
    testView.layer.insertSublayer(layer, at: 0)
    testView.backgroundColor = .clear

    cell.backgroundView = testView


    return cell

}

Answer 14

在Swift 4.2中：

class MyCell: UITableViewCell {

var top = false
var bottom = false

override func layoutSubviews() {
    super.layoutSubviews()

    if top && bottom {
        layer.cornerRadius = 10
        layer.masksToBounds = true
        return
    }

    let shape = CAShapeLayer()
    let rect = CGRect(x: 0, y: 0, width: bounds.width, height: bounds.size.height)
    let corners: UIRectCorner = self.top ? [.topLeft, .topRight] : [.bottomRight, .bottomLeft]

    shape.path = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: CGSize(width: 10, height: 10)).cgPath
    layer.mask = shape
    layer.masksToBounds = true
  }
}

要使用：

如果该单元格是组中的第一个，则设置top = True；如果它是最后一个单元格，则bottom = true；如果该单元格是该组中的唯一单元，则将两者都设置为true

如果要四舍五入，只需将单选框从10更改为另一个值即可。

Answer 15

此代码将为整个表格视图而不是单个单元格设置圆角。

UIView *roundedView = [[UIView alloc] initWithFrame:CGRectInset(table.frame, 5, 0)];
roundedView.backgroundColor = [UIColor colorWithWhite:1.f alpha:0.8f];
roundedView.layer.cornerRadius = 5.f;
[self.view addSubview:roundedView];
[roundedView release];
[self.view addSubview:table];

清除cellForRow中每个单元格的背景颜色

cell.backgroundColor=[UIColor clearColor];

iOS 7 TableView就像iPad上的设置应用程序一样

15 个答案: