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这可能是一个显而易见的问题,但我无法找出解决这个问题的正确方法。我有一个自定义的 segue 类,它的工作原理是它成功地转换到目标控制器。在目标控制器中,我需要获取一些子视图的位置并将它们保存以备后用。我正在 ViewDidAppear 中执行此操作。此代码在使用标准 segue 时有效,但在使用我的自定义 segue 时位置解析为 {0, 0}。但是,我可以对子视图做其他事情,比如画一个边框。

目标视图的代码:

-(void)viewDidAppear:(BOOL)animated
{
   [super viewDidAppear:animated];

   for (UIView * view in self.videos) {
       [self.origCenter setObject:[NSValue valueWithCGPoint:[view.superview convertPoint:view.center toView:view.superview]]
                        forKey:[NSValue valueWithNonretainedObject:view]];
    view.layer.borderColor = [UIColor redColor].CGColor;
    view.layer.borderWidth = 3.0f;
   }
}

自定义segue的代码:

-(void)perform {

    UIViewController *sourceViewController = (UIViewController*)[self sourceViewController];
    UIViewController *destinationController = (UIViewController*)[self destinationViewController];
    [sourceViewController.view addSubview:destinationController.view];

    CATransition* transition = [CATransition animation];
    transition.duration = .25;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush; 
    transition.subtype = kCATransitionFromRight; 

    [sourceViewController.navigationController.view.layer addAnimation:transition forKey:kCATransition];

    [[self sourceViewController] presentModalViewController:[self destinationViewController] animated:NO];

}
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