UIImageView 动画启动并出现内存不足警告答案

【问题标题】：UIImageView animation starts and low memory warning occursUIImageView 动画启动并出现内存不足警告
【发布时间】：2013-02-25 12:16:45
【问题描述】：

我的 ImageView 动画有问题。在我看来，有超过 10 个视图，每个视图都从它的标签值中识别出来，我有 UIImageView 和 UIButton。当点击按钮时，必须为视图的特定图像设置动画。如果任何其他图像被动画化，则必须停止。这是我的代码：

-(void)makeAnimation:(UIButton *)sender {

UIView *tagView=(UIView *)[self.view viewWithTag:sender.tag];
UIView *next=nil;
UIView *previous=nil;


NSLog(@"%d",sender.tag);
for (UIImageView * imageview in [tagView subviews]) {
     if ([imageview isKindOfClass:[UIImageView class]]) {

        if ([imageview isAnimating]) {
            NSLog(@"Animation Happens");

        }

        else{

            imageview.animationDuration=2.0;

            imageview.animationImages=[animationArray objectAtIndex:sender.tag-1];
            imageview.animationRepeatCount=2;
            imageview.tag=sender.tag;
            [imageview startAnimating];
        }
    }

}
   next=(UIView*)[self.view viewWithTag:sender.tag+1];
    previous=(UIView*)[self.view viewWithTag:sender.tag-1];
    NSLog(@"NOT IDEA");

    [self previousview:previous nextview:next];
 }

-(void)previousview:(UIView *)previous nextview:(UIView*)next
{
for (UIImageView * imageview in [previous subviews]) {

    if ([imageview isKindOfClass:[UIImageView class]]) {

        [imageview stopAnimating];
        NSLog(@"PRREVIOUS");

              }

}

for (UIImageView * imageview in [next subviews]) {

    if ([imageview isKindOfClass:[UIImageView class]]) {

        [imageview stopAnimating];
        NSLog(@"NEXT");

     }
   }
}

现在我的问题是当我一个接一个地选择超过 4 个按钮时，我的应用程序因内存警告而崩溃。

【问题讨论】：

您的应用程序是否启用了 ARC？

标签： ios objective-c xcode uiimageview uianimation

【解决方案1】：

在运行时使用配置文件找到泄漏的确切位置并使用@autorelease{}手动处理内存像这样..

-(void)makeAnimation:(UIButton *)sender {
@autorelease{
UIView *tagView=(UIView *)[self.view viewWithTag:sender.tag];
UIView *next=nil;
UIView *previous=nil;


NSLog(@"%d",sender.tag);
for (UIImageView * imageview in [tagView subviews]) {
     if ([imageview isKindOfClass:[UIImageView class]]) {

        if ([imageview isAnimating]) {
            NSLog(@"Animation Happens");

        }

        else{

            imageview.animationDuration=2.0;

            imageview.animationImages=[animationArray objectAtIndex:sender.tag-1];
            imageview.animationRepeatCount=2;
            imageview.tag=sender.tag;
            [imageview startAnimating];
        }
    }

}
   next=(UIView*)[self.view viewWithTag:sender.tag+1];
    previous=(UIView*)[self.view viewWithTag:sender.tag-1];
    NSLog(@"NOT IDEA");

    [self previousview:previous nextview:next];
}
 }

【讨论】：