在iOS 7中使用superview获取UITableViewCell

Question

我得到的UITutView属于UIButton属于这样:

-(void)buttonHandler:(UIButton *)button {

    OrderCell *cell = [[button superview] superview];
    NSLog(@"cell.item = %@", cell.item.text);

在iOS 7之前它可以正常工作.但是给了我:

[UITableViewCellScrollView item]:无法识别的选择器发送到实例0x17ae2cf0

如果我在iOS 7中运行该应用程序.但如果我这样做:

-(void)buttonHandler:(UIButton *)button {

    OrderCell *cell = [[[button superview] superview] superview];
    NSLog(@"cell.item = %@", cell.item.text);

然后它可以在iOS 7中运行,但不是更早？？？!？!

我这样做是在绕过这个问题:

OrderCell *cell;
if([[[UIDevice currentDevice] systemVersion] isEqualToString:@"7.0"])
    cell = [[[button superview] superview] superview];
else
    cell = [[button superview] superview];

NSLog(@"cell.item = %@", cell.item.text);

但是WTF还在继续!？有谁知道为什么会这样？

谢谢!

Answer 1

更好的解决方案是为UIView(SuperView)添加一个类别,并通过以下方式调用它:

UITableViewCell *cell = [button findSuperViewWithClass:[UITableViewCell class]]

这样,您的代码适用于所有未来和过去的iOS版本

@interface UIView (SuperView)

- (UIView *)findSuperViewWithClass:(Class)superViewClass;

@end


@implementation UIView (SuperView)

- (UIView *)findSuperViewWithClass:(Class)superViewClass {

    UIView *superView = self.superview;
    UIView *foundSuperView = nil;

    while (nil != superView && nil == foundSuperView) {
        if ([superView isKindOfClass:superViewClass]) {
            foundSuperView = superView;
        } else {
            superView = superView.superview;
        }
    }
    return foundSuperView;
}
@end

Answer 2

最好的方法是:

CGPoint buttonPosition = [sender convertPoint:CGPointZero toView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:buttonPosition];
UITableViewCell *cell = (UITableViewCell*)[self.tableView cellForRowAtIndexPath:indexPath];