Question

我正在尝试以编程方式在自定义UITableViewHeaderFooterView类上添加按钮，如下所示，它不会出现。

我想知道我错过了什么或做错了什么？

- (instancetype)initWithReuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithReuseIdentifier:reuseIdentifier]) {

        UIButton * clickBtn = [[UIButton alloc]initWithFrame:CGRectMake(self.contentView.bounds.size.width-50, 0, 50, 50)];
        clickBtn.imageView.image = [UIImage imageNamed:@"carat-open.png"];
        [self.contentView addSubview:clickBtn];
    }
    return self;
}

Answer 1

在此函数内创建UIButton，并将按钮作为子视图添加到标题视图

 - (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{

     UIButton * clickBtn = [[UIButton alloc]initWithFrame:CGRectMake(self.contentView.bounds.size.width-50, 0, 50, 50)];
     clickBtn.imageView.image = [UIImage imageNamed:@"carat-open.png"];

    UIView *headerView = [[UIView alloc] init];
    [headerView addSubview:clickBtn];
    headerView.backgroundColor=[UIColor colorWithRed:0.95 green:0.95 blue:0.95 alpha:1.0];
    return headerView;
}

Answer 2

在“页脚”中添加自定义视图：

 - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
   {
       return 20;
   }


- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    return  [self getViewForFooterForSection];
}


- (UIView*)getViewForFooterForSection
{
    UIView *sectionFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 20)];
    sectionFooterView.backgroundColor = [UIColor redColor];
    return sectionFooterView;
}

从自定义视图文件
添加节页脚的自定义视图

CustomFooter

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];

    if(self)
    {
        self.frame = frame;
        self.backgroundColor = [UIColor blueColor];
    }

    return  self;
}

查看控制器

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    return  [self getViewForFooterForSection];
}


- (UIView*)getViewForFooterForSection
{
    CustomFooter *sectionFooterView = [[CustomFooter alloc] initWithFrame:CGRectMake(0, 0, 100, 20)];
    return sectionFooterView;
}

在表格页脚视图中添加自定义视图

tbl.tableFooterView = [self getViewForTableView];

- (UIView*)getViewForTableView
{
    UIView *tableFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 20)];
    tableFooterView.backgroundColor = [UIColor greenColor];
    return tableFooterView;
}

Answer 3

你不能设置那样的按钮图像。

clickBtn.imageView.image = [UIImage imageNamed：@“carat-open.png”];

imageView属性是readonly。

使用这个

（void）setImage :( nullable UIImage *）image forState：（UIControlState）state;

在自定义UITableViewHeaderFooterView

3 个答案: