在 iOS5 中，我在图库中切换图片的方法很糟糕

Posted 2023-03-12

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【中文标题】在 iOS5 中，我在图库中切换图片的方法很糟糕【英文标题】：in iOS5 my methods for switching pictures in gallery are bad 【发布时间】：2011-11-08 14:12:42 【问题描述】：

我有一些在画廊中观看图片的课程。在启用 ARC 后的这些类中，我收到 ARC 禁止隐式转换并且我无法运行应用程序的消息。

这些方法是：

- (void) curlToPrevious

    if (currentImageIndex == 0) return;



         if ([self.image2 superview] == NO) 

        self.image2.image = (UIImage*) [imageViews objectAtIndex:(currentImageIndex-1)];
     else 
        self.image1.image = (UIImage*) [imageViews objectAtIndex:(currentImageIndex-1)];
    

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:kTransitionDuration];

    currentImageIndex--;

    [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.containerView cache:YES];

    if ([self.image2 superview] == NO) 
        [self.image1 removeFromSuperview];
        [self.containerView addSubview:self.image2];
     else 
        [self.image2 removeFromSuperview];
        [self.containerView addSubview:self.image1];
    

    [UIView commitAnimations];
    [self updateCurrentImageCounter];


- (void) curlToNext

    if (currentImageIndex == ([self imageCount]-1)) return;

    if ([self.image2 superview] == NO) 
        self.image2.image = (UIImage*) [imageViews objectAtIndex:(currentImageIndex+1)];
     else 
        self.image1.image = (UIImage*) [imageViews objectAtIndex:(currentImageIndex+1)];
    
    currentImageIndex++;


    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:kTransitionDuration];

    [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.containerView cache:YES];

    if ([self.image2 superview] == NO) 
        [self.image1 removeFromSuperview];
        [self.containerView addSubview:self.image2];
     else 
        [self.image2 removeFromSuperview];
        [self.containerView addSubview:self.image1];
    

    [UIView commitAnimations];
    [self updateCurrentImageCounter];

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