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I'm having problem were my views frames are completely wrong after return to the viewController by popping the current one.

My view hierarchy is as follows:

UITabbarController,
    UINavigationController
        HomeSwipeViewController (need as I cant put a UIPageViewController straight into a navController)
            UIPageViewController
                 HomeViewController

In the HomeSwipeViewController I have the pageViewController embedded in a containerView, the containerView has constraints and should be full to it's super (set in the storyboard): 

self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

[self.containerView addSubview:self.pageController.view];
[self addChildViewController:self.pageController];
[self.pageController didMoveToParentViewController:self];

[self.pageController.view addFullScreenConstraint]; // full to superView

Inside the homeViewController is a collectionView which you can tap and I push a ViewController on to the UINavigationController. This works fine but when I pop back to the HomeSwipeViewController, the frames are all incorrect.

Logs printed out in viewDidAppear of homeSwipeViewController:

First appears:

[12234:152630] containerView: <UIView: 0x7fea0046cdb0; frame = (0 0; 320 464); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x7fea0046c450>>
[12234:152630] pageController.view: <_UIPageViewControllerContentView: 0x7fea0290b690; frame = (0 0; 320 464); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x7fea02909f60>>
[12234:152630] self.view: <UIView: 0x7fea0285d2d0; frame = (0 64; 320 504); autoresize = W+H; layer = <CALayer: 0x7fea0285d1d0>>

After pop:

[12234:152630] containerView: <UIView: 0x7fea0046cdb0; frame = (0 0; 0 0); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x7fea0046c450>>
[12234:152630] pageController.view: <_UIPageViewControllerContentView: 0x7fea0290b690; frame = (0 0; 0 0); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x7fea02909f60>>
[12234:152630] self.view: <UIView: 0x7fea0285d2d0; frame = (0 64; 320 455); autoresize = W+H; layer = <CALayer: 0x7fea0285d1d0>>

I've tried calling setNeedsDisplay, setNeedsLayout and setNeedsUpdateConstraints in the viewDidAppear. Adding constraints all programmatically in viewDidLayoutSubViews.

No broken constraints are logged in the console.

I believe it has to to do with embedding the viewController because when I remove the UIPageViewController and add the homeViewContoller as the childViewController, the same results happen.

If I embed nothing there isn't a problem.

All views have translatesAutoresizingMaskIntoConstraints = NO

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1 回答 1

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我通过在 viewDidLayoutSubviews 中设置父视图控制器 (HomeSwipeViewController) 的约束来解决此问题。我只使用 self.view.translatesAutoresizingMaskIntoConstraints = YES;

我认为这是因为该项目同时使用了已现代化为自动布局的视图和基于框架（自动调整大小）的视图。它看起来像是用没有自动布局的视图推送 VC，从约束中删除 VC，或者它只是停用自动布局引擎。 

- (void)viewDidLayoutSubviews {

    if (self.view.superview) {

        self.view.translatesAutoresizingMaskIntoConstraints = NO;

        [self.view.superview addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[view]|" options:kNilOptions metrics:nil views:@{@"view": self.view}]];
        [self.view.superview addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-64-[view]|" options:kNilOptions metrics:nil views:@{@"view":self.view}]];

    }

    [super viewDidLayoutSubviews];
}

任何关于为什么这样做的见解都会很酷！

于 2015-01-26T10:05:17.133 回答