setFrame可在iOS7上运行，但在iOS6上不再可用

Spearfisher 发表于 Dev

鱼叉鱼

我刚刚切换到iOS7 SDK。在此之前，我的应用在iOS6上运行良好，但现在不再运行，但现在在iOS7上运行良好。

我有一个带有页面控件的scrollView，以显示具有以下设置的3个不同的选项卡：

self.scrollView.pagingEnabled = YES;
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * 3, self.scrollView.frame.size.height);
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
self.scrollView.scrollsToTop = NO;
self.scrollView.delegate = self;

我在此scrollView上添加了我从3个不同的故事板上加载的3个视图：

    UIStoryboard *timelineStoryboard=[UIStoryboard storyboardWithName:@"timelineStoryboard" bundle:nil];
TabBarViewController *mainVC=[timelineStoryboard instantiateInitialViewController];
self.currentViewController =mainVC;
[mainVC.view setFrame:CGRectMake(320, 20, mainVC.view.frame.size.width, mainVC.view.frame.size.height)];
[self.scrollView addSubview:mainVC.view];
[self addChildViewController:mainVC]; 

UIStoryboard *expenseStoryboard=[UIStoryboard storyboardWithName:@"expenseStoryboard" bundle:nil];
TabBarViewController *leftVC=[expenseStoryboard instantiateInitialViewController];
self.leftViewController =leftVC;
[leftVC.view setFrame:CGRectMake(0, 20, leftVC.view.frame.size.width, leftVC.view.frame.size.height)];
[self.leftViewController.view setFrame:CGRectMake(0, 20, leftVC.view.frame.size.width, leftVC.view.frame.size.height)];
[self.scrollView addSubview:leftVC.view];
[self addChildViewController:leftVC];


UIStoryboard *dashboardStoryboard=[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
TabBarViewController *rightVC=[dashboardStoryboard instantiateViewControllerWithIdentifier:@"dashboardVC"];
self.leftViewController =rightVC;
[rightVC.view setFrame:CGRectMake(640, 20, rightVC.view.frame.size.width, rightVC.view.frame.size.height)];
[self.scrollView addSubview:rightVC.view];
[self addChildViewController:rightVC];

在iOS6上，这三个视图可以彼此重叠显示，而在iOS7上，它们可以正确显示（横坐标为0，一个为x = 320，另一个为x = 640）。有谁知道如何解决这个问题？

非常感谢

鱼叉鱼

我找到了答案。我使用了中间变量，并且有效。不要为什么。如果有人有答案，我会很高兴听到。

无论如何，有效的代码在这里：

UIStoryboard *dashboardStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
TabBarViewController  *rightVC = [dashboardStoryboard instantiateViewControllerWithIdentifier:@"dashboardVC"];

UIView *dashboardView = rightVC.view;
[dashboardView setFrame:CGRectMake(640,
                                   20,
                                   320,
                                   screenHeight+20)];

[self.scrollView addSubview:dashboardView];
[self addChildViewController:rightVC];

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