滑動子視圖關閉屏幕

Question

我有一個圖像視圖作爲子視圖，我試圖實現向上滑動屏幕的手勢。滑動工作，但它不動畫。

這是我如何添加子視圖：

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
    [collectionView deselectItemAtIndexPath:indexPath animated:YES]; 

    InstagramMedia *media = mediaArray[indexPath.row]; 

    for (int i = 0; i < mediaArray.count; i++) 
    { 
     InstagramMedia *instagramMedia = [mediaArray objectAtIndex:i]; 
     [imageArray addObject:instagramMedia.standardResolutionImageURL]; 
    } 

    largeImageArray = imageArray; 
    imageIndex = indexPath.row; 

    UICollectionViewLayoutAttributes *attributes = [self.collectionView layoutAttributesForItemAtIndexPath:indexPath]; 
    CGRect cellRect = attributes.frame; 

    blurredView = [[UIToolbar alloc]initWithFrame:self.view.bounds]; 
    [blurredView setBarStyle:UIBarStyleBlackOpaque]; 
    [self.view addSubview:blurredView]; 

    imageView = [[UIImageView alloc]initWithFrame:cellRect]; 
    imageView.contentMode = UIViewContentModeScaleAspectFit; 
    imageView.userInteractionEnabled = YES; 
    [imageView setImageWithURL:media.standardResolutionImageURL placeholderImage:[UIImage imageNamed:@"placeholder"]]; 
    [self.view addSubview:imageView]; 
    CGRect finalFrame = CGRectMake(0, 50, 320, 301); 
    [UIView animateWithDuration:0.5 animations:^{ 
     imageView.frame = finalFrame; 
    }]; 

    UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeLeft:)]; 
    swipeRecognizer.direction = UISwipeGestureRecognizerDirectionLeft; 
    [self.view addGestureRecognizer:swipeRecognizer]; 

    UISwipeGestureRecognizer *swipeRightRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeRight:)]; 
    swipeRightRecognizer.direction = UISwipeGestureRecognizerDirectionRight; 
    [self.view addGestureRecognizer:swipeRightRecognizer]; 

    swipeUpRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeUp:)]; 
    swipeUpRecognizer.direction = UISwipeGestureRecognizerDirectionUp; 
    [self.view addGestureRecognizer:swipeUpRecognizer]; 
} 

這就是我想要做的事：

- (IBAction)swipeUp:(id)sender 
{ 
    CGRect finalFrame = CGRectMake(0, -100, 320, 301); 
    [UIView animateWithDuration:0.5 animations:^{ 
     imageView.frame = finalFrame; 
     [imageView removeFromSuperview]; 
     [blurredView removeFromSuperview]; 
     [self.view removeGestureRecognizer:swipeUpRecognizer]; 
    }]; 
} 

Answer 1

- (IBAction)swipeUp:(id)sender 
    { 
     CGRect finalFrame = CGRectMake(0, -100, 320, 301); 
     [UIView animateWithDuration:0.5 animations:^{ 
      imageView.frame = finalFrame; 

     } completion:^(BOOL finished) { 
[imageView removeFromSuperview]; 
      [blurredView removeFromSuperview]; 
      [self.view removeGestureRecognizer:swipeUpRecognizer]; 
}]; 
    } 

您的動畫結束之前，移除視圖...這就是它發生的原因。