子視圖淡入和淡出幫助

Question

我有一個問題淡出我的子視圖。我沒有任何麻煩，只能淡化視野。

-(void)flipToReview { 
ReviewViewController *reviewVariable = [[ReviewViewController alloc] initWithNibName:@"ReviewViewController" bundle:nil]; 
[self setReviewViewController:reviewVariable]; 
self.ReviewViewController.view.alpha =0; 
[UIView beginAnimations:@"flipview" context:nil]; 
[UIView setAnimationDuration:0.3]; 
[UIView setAnimationCurve:UIViewAnimationCurveLinear]; 
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:YES]; 
[reviewVariable release];  
[self.window addSubview:self.ReviewViewController.view]; 
self.ReviewViewController.view.alpha =1; 

[UIView commitAnimations]; 
} 


-(void)flipBackFromReview { 
// self.ReviewViewController.view.alpha = 1; 

[UIView beginAnimations:@"trip" context:nil]; 
[UIView setAnimationDuration:0.3]; 
[UIView setAnimationCurve:UIViewAnimationCurveLinear]; 

[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:NO]; 
self.ReviewViewController.view.alpha = 0; 
[self.ReviewViewController.view removeFromSuperview]; 
[UIView commitAnimations]; 
self.window.rootViewController = self.tabBarController; 
[self.window makeKeyAndVisible]; 
[self.ReviewViewController.view setHidden:1]; 
NSLog(@"remove subview"); 
} 

Answer 1

您需要移動：

[self.ReviewViewController.view removeFromSuperview]; 

不能在動畫完成 「隨着時間的推移」。你想要做的是將其移動到選擇器並使用setAnimationDelegate和setAnimationDidStopSelector。把你的動畫塊如下：

[UIView setAnimationDelegate:self]; 
[UIView setAnimationDidStopSelector:@selector(finshedFadeOut)]; 

然後進行以下方法：

- (void)finshedFadeOut { 
    [self.ReviewViewController.view removeFromSuperview]; 
} 

Answer 2

我有這個問題，也是，我周圍的方式，它正在改變阿爾法爲0，而不是隻是刪除視圖。這可以是動畫。

Answer 3

嘗試以下操作：

[UIView animateWithDuration:3.0 delay:0.0 
        options:UIViewAnimationOptionAllowUserInteraction 
       animations:^{ ReviewViewController.view.alpha = 0.0;} 
       completion:^(BOOL fin) { 
       if (fin) [ReviewViewController.view removeFromSuperview]; 
       }];