tableview单元格中的Textfield在iOS7上崩溃

Question

我的代码在iOS 6上工作正常但在iOS 7中崩溃。

我将文本字段与表格视图单元格文本字段进行比较。

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{

    DLog(@"-> %@", textField.text);

    PhotoViewCustomCell *cell = (PhotoViewCustomCell*)[[textField superview] superview];
    NSIndexPath *indexPath = [tblPhotoDetail indexPathForCell:cell];

    //PhotoViewCustomCell *cell = (PhotoViewCustomCell *)[tblPhotoDetail cellForRowAtIndexPath:indexPath];

    PhotoInformation *objPhotoInfo = [selectedPhotos objectAtIndex:indexPath.row];

    if ([textField isEqual:cell.mytextfield]) 
    { =========>crashing in this line

       do something
    }
    else 
    {
      do something
    }
}

错误：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITableViewCellScrollView mytextfield]: unrecognized selector sent to instance 0xdc119a0'

Answer 1

添加额外的超级视图调用以获取您的单元格。看起来你正在隐藏UITableViewCellScrollView，它位于contentView

之上的层次结构中

 PhotoViewCustomCell *cell = (PhotoViewCustomCell*)[[[textField superview] superview] superview];

Answer 2

接受答案中的代码不是更安全的代码，也不能用于iOS 6。我宁愿建议你使用这段代码。 ：

UIView *view = [textField superview];
while (![view isKindOfClass:[PhotoViewCustomCell class]]) {
    view = [view superview];
}
PhotoViewCustomCell *cell = (PhotoViewCustomCell *)view;