9

我有一个UIViewController介绍另一个UIViewController。两个视图控制器都使用topLayoutGuide自动bottomLayoutGuide布局。

一切都很好，有和没有通话栏。或者有或没有自定义过渡......

但是，当有一个通话栏和一个自定义转换时，我呈现的视图控制器的子视图错位了 20 像素（导致底部的剪辑视图）。

我查了一下，是那个topLayoutGuide和bottomLayoutGuide哪个放错了……

这是转换的代码：

#pragma mark - GETTER
- (CGFloat)presentationTopProgressValue {
    return __fromViewControllerView.y / __containerView.height;
}

#pragma mark - SETTER
- (void)set_context:(id<UIViewControllerContextTransitioning>)_context {
    __context = _context;
    __containerView = [__context containerView];

    __fromViewController = [__context viewControllerForKey:UITransitionContextFromViewControllerKey];
    __fromViewControllerView = [__fromViewController view];
    __toViewController = [__context viewControllerForKey:UITransitionContextToViewControllerKey];
    __toViewControllerView = [__toViewController view];
}

#pragma mark - TRANSITION
- (id<UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
    return self;
}

#pragma mark - ANIMATING
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
    self._context = transitionContext;

    UIDynamicAnimator *animator = [[UIDynamicAnimator alloc] initWithReferenceView:__containerView];

    UIGravityBehavior *gravityBehavior = [[UIGravityBehavior alloc] initWithItems:@[__fromViewControllerView]];
    gravityBehavior.gravityDirection = CGVectorMake(0, 5.0f);

    __weak typeof(self) weakSelf = self;
    gravityBehavior.action = ^{
        typeof(self) strongSelf = weakSelf;

        if ([strongSelf presentationTopProgressValue] > 1.0) {
            [animator removeAllBehaviors];

            [strongSelf._context completeTransition:YES];
            strongSelf._context = nil;
        }
    };

    [__containerView addSubview:__toViewControllerView];
    [__containerView addSubview:__fromViewControllerView];

    [animator addBehavior:gravityBehavior];
}

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {
    return 0.2f;
}

这是演示的代码：

MPProfileViewController *next = [MPProfileViewController new];
MPNavigationController *nav = [[MPNavigationController alloc] initWithRootViewController:next];
#warning - The transition delegate create a wrong margin layout when in-call bar is active
nav.modalPresentationStyle = UIModalPresentationFullScreen;
nav.transitioningDelegate = __dragToDismiss;
[self.navigationController presentViewController:nav animated:YES completion:nil];
4

1 回答 1

0

在为视图层次结构创建视图时，您应该始终设置视图的自动调整大小属性。当视图控制器显示在屏幕上时，它的根视图通常会调整大小以适应可用空间，这可能会根据窗口的当前方向和其他界面元素（例如状态栏）的存在而有所不同。您可以使用检查器窗口或以编程方式通过修改每个视图的 autoresizesSubviews 和 autoresizingMask 属性来配置 Interface Builder 中的自动调整大小属性。如果您的视图控制器同时支持纵向和横向方向，那么设置这些属性也很重要。在方向更改期间，系统使用这些属性自动重新定位和调整视图大小以匹配新方向。

于 2015-05-14T17:24:31.977 回答