Question

在表格视图单元格中调整图像大小...我是新程序员

通过这个代码图像进入单元格...但我想根据我的需要调整大小图像....

如果可能的话，给我一点代码...... 提前谢谢......

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:[NSString stringWithFormat:@"Cell %i",indexPath.section]];

    if (cell == nil) {
        //.......
    }
    search_items *pro = [result objectAtIndex:0];

    if(indexPath.row==0)
    {

    NSString *filepath=[[NSBundle mainBundle]pathForResource:pro.s_image ofType:@"png"];

    UIImage *image=[UIImage imageWithContentsOfFile:filepath];

    cell.imageView.contentMode = UIViewContentModeScaleAspectFit;

    //[cell.imageView setContentMode:UIViewContentModeScaleAspectFit];

    [cell.imageView setFrame:CGRectMake(50,50,100,100)];

    /*
    CGRect iframe = cell.imageView.frame;
    iframe.size.height = 100.0;
    iframe.size.width=300.0;

    cell.imageView.frame = iframe;

    */


    cell.imageView.image=image; 
    }
}

Answer 1

不是调整cell.imageView框架的大小，而是在将图像分配给cell.imageView.image之前尝试调整图像大小：

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString * cellIdentifier = @"cellIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }

    cell.textLabel.text = @"My Cell's Title Text";
    cell.detailTextLabel.text = @"My Cell's Description Text";

    //### SETTING THE IMAGE HERE###
    //Let's say I want to resize my image entitled "myImage.png" to be 50x50 pixels in the table cell
    CGSize size = {50,50};
    cell.imageView.image = [self imageWithImage:[UIImage imageNamed:@"myImage.png" scaledToSize:size];

    return cell;
}

//Given a UIImage and a CGSize, this method will return a resized UIImage.
- (UIImage*)imageWithImage:(UIImage*)image
          scaledToSize:(CGSize)newSize;
{
    UIGraphicsBeginImageContext( newSize );
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return newImage;
}

来源：

Answer 2

您可以像这样更改imageView的框架：

CGRect frame = imageView.frame;
frame.size.height = 30.0;
/* other frame changes ... */
imageView.frame = frame;

您还应该查看UIImageView contentMode属性（请参阅this post）。它使您可以控制图像的绘制方式，实际上是UIView属性（因此UIImageView继承它）。它为您提供以下选项：

指定视图在其大小更改时如何调整其内容。

typedef enum {
   UIViewContentModeScaleToFill,
   UIViewContentModeScaleAspectFit,
   UIViewContentModeScaleAspectFill,
   UIViewContentModeRedraw,
   UIViewContentModeCenter,
   UIViewContentModeTop,
   UIViewContentModeBottom,
   UIViewContentModeLeft,
   UIViewContentModeRight,
   UIViewContentModeTopLeft,
   UIViewContentModeTopRight,
   UIViewContentModeBottomLeft,
   UIViewContentModeBottomRight,
} UIViewContentMode;

Answer 3

您应该使用单元格的backgroundView属性并添加可伸缩的图像：

UIImage* backgroundImage = [[UIImage imageNamed:@”stretchableImage.png”] stretchableImageWithLeftCapWidth:44 topCapHeight:45];

希望这有帮助，文森特

Answer 4

1°）嗯，通过调整大小，你的意思是哪个是正确缩放的？您应该检查UIImageView类的contentMode属性 [cell.imageView setContentMode：];

2°）如果你想调整框架的大小，那就干嘛 [cell.imageView setFrame：CGRectMake（）];

取决于你真正的问题^^

祝你好运。

在表视图单元格中调整图像大小

4 个答案: