在iOS 7中使用superview获取UITableViewCell [英] Getting UITableViewCell with superview in iOS 7

问题描述

我得到的UITutView属于这样的UITutViewCell：

I'm getting the UITableViewCell a UIButton belongs to like this:

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

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

在iOS 7之前的任何东西都能正常工作。但是给了我：

And it works fine in anything before iOS 7. But gives me:

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

[UITableViewCellScrollView item]: unrecognized selector sent to instance 0x17ae2cf0

如果我在iOS 7中运行应用程序。但是如果我这样做：

if I run the app in iOS 7. BUT if I do:

-(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？？？！？！

Then it works in iOS 7 but not earlier?!?!?!

我通过这样做来解决这个问题：

I'm circumventing the issue by doing this:

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？

but WTF is going on!? Does anyone know why this happens?

谢谢！

推荐答案

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：

A better solution is to add a category for UIView(SuperView), and calling it by:

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

这样，你的代码适用于所有未来和过去的iOS版本

This way, your code works for all future and past iOS versions

@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

这篇关于在iOS 7中使用superview获取UITableViewCell的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！