UIStoryBoardSegue過渡 - 狀態欄問題

Question

我想創建一個使用UIStoryboardSegue子類的新視圖控制器的自定義過渡，但我遇到了一些問題。我有一個後退按鈕，使用AutoLayout將其設置爲距離頂部佈局指南（距離視圖頂部25個像素）爲5個像素。但是，當我正在過渡時，我的視圖不考慮狀態欄的存在，並使按鈕距離視圖頂部5個像素，而不是距離視圖頂部25個像素（status-bar.height = = 20px）。所以當轉換完成後，當我調用[[self sourceViewController] presentModalViewController：[self destinationViewController] animated：NO]時突然反彈;因爲那時按鈕實際上會正確分層。有沒有人有任何想法，我可以告訴我的觀點，它應該佈局，假設頂部佈局指南開始在20px而不是0？

編輯：這個問題似乎與topLayoutGuide直接相關。當我檢查topLayoutGuide的值時，它是0，當我在轉換中添加視圖時，但是當我在目標視圖控制器的viewDidAppear中檢查它時，它是20像它應該是。

- (void)perform { 
UIWindow *window = [[[UIApplication sharedApplication] windows] objectAtIndex:0]; 
UIViewController *sourceViewController = (UIViewController*)self.sourceViewController; 
UIViewController *destinationViewController = (UIViewController*)self.destinationViewController; 

[destinationViewController.view setCenter:CGPointMake(window.frame.size.width * 1.5, sourceViewController.view.center.y)]; 
[[sourceViewController.view superview] addSubview:destinationViewController.view]; 
[destinationViewController.view setBackgroundColor:[UIColor redColor]]; 

POPSpringAnimation *positionAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionX]; 
positionAnimation.toValue = @(window.center.x); 
positionAnimation.springBounciness = 10; 


POPSpringAnimation *fromPositionAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionX]; 
double offScreenX = -sourceViewController.view.frame.size.width; 
fromPositionAnimation.toValue = @(offScreenX); 
fromPositionAnimation.springBounciness = 10; 
[fromPositionAnimation setCompletionBlock:^(POPAnimation *anim, BOOL finished) { 
}]; 

POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY]; 
scaleAnimation.springBounciness = 20; 
scaleAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(1.0, 1.1)]; 
[scaleAnimation setCompletionBlock:^(POPAnimation *anim, BOOL finished) { 
    [[self sourceViewController] presentModalViewController:[self destinationViewController] animated:NO]; 
}]; 

[sourceViewController.view.layer pop_addAnimation:fromPositionAnimation forKey:@"positionAnimation"]; 
[destinationViewController.view.layer pop_addAnimation:positionAnimation forKey:@"positionAnimation"]; 
[destinationViewController.view.layer pop_addAnimation:scaleAnimation forKey:@"scaleAnimation"]; 

}

Answer 1

我建議叫setNeedLayout上viewWillAppear中。它應該調整視圖子視圖的佈局。