我的UITableViewCell设置按钮

Question

我在向我添加按钮时遇到问题UITableViewCell,单元格有两个UILabels和两个UIImageViews,有时UIImageView会包含一个图像,有时会包含一个按钮:

在我的UITableViewCell子类中,我有:

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if ( self ) {
        // Initialization code

    firstLock = [[UILabel alloc]init];
    [firstLock setBackgroundColor:[UIColor clearColor]];
    firstLock.textAlignment = UITextAlignmentLeft;
    firstLock.font = [UIFont fontWithName:@"Arial-BoldMT" size:17];

    secondLock= [[UILabel alloc]init];
    [secondLock setBackgroundColor:[UIColor clearColor]];
    secondLock.textAlignment = UITextAlignmentRight;
    secondLock.font = [UIFont fontWithName:@"Arial-BoldMT" size:17];

    firstLockImage = [[UIImageView alloc]init];

    secondLockImage = [[UIImageView alloc] init];

    [self.contentView addSubview:firstLock];
    [self.contentView addSubview:secondLock];
    [self.contentView addSubview:firstLockImage];
    [self.contentView addSubview:secondLockImage];
    }
    return self;
}

当其中一个UIImageViews只是一个图像没问题,但是当我添加一个UIButton(成像)作为子视图时它会崩溃.

在UITableViewDataSource实施中:

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



UIImage *btnImage = [UIImage imageNamed:@"bike_ok.png"];

UIButton *button =[UIButton alloc];
[button setImage:btnImage forState:UIControlStateNormal];

[cell.secondLockImage addSubview:button];

添加按钮作为图像视图的子视图会崩溃:

 Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Requesting the window of a view (<UIButton: 0x7bac7d0; frame = (0 0; 0 0); transform = [0, 0, 0, 0, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = (null)>) with a nil layer. This view probably hasn't received initWithFrame: or initWithCoder:.'
*** First throw call stack:

我错过了什么？

谢谢!

加上吧!这条线非常重要

    [firstLockImage setUserInteractionEnabled:YES];
    [secondLockImage setUserInteractionEnabled:YES];

因为UIImageView默认为NO,没有它就没有按钮!

Answer 1

如果您阅读了崩溃错误,则很容易看出您的问题所在.您尚未初始化按钮.

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0,0,0,0)];

或者您可以使用initWithCoder.

希望这可以帮助

山姆