在下载图像时，iPhone4s中的应用程序崩溃

Question

我使用SDWebImage从服务器下载异步下载图像。我已经用iOS 8.1测试了iPhone 5和5s中的应用程序并且工作正常，没有内存警告。但是我给客户端编译（使用iPhone 4s）并且在加载图像时他面临一些崩溃，不幸的是我没有iPhone 4，所以无法解决问题。我在使用iPhone5的乐器中进行了测试，这是几次运行后的屏幕截图。 这是我的下载图像代码

-(void)setImageWithUrl:(NSURL*)imgurl onImageView:(UIImageView*)image prograssive:(BOOL)progressive
{

    __block UIActivityIndicatorView *activityIndicator;

    __weak UIImageView *weakImageView = image;

    SDWebImageOptions opt;
    if (progressive) {

        opt = SDWebImageProgressiveDownload;
    }
    else
        opt = SDWebImageRetryFailed;

    [image sd_setImageWithURL:imgurl placeholderImage:[UIImage imageNamed:@"default_image"] options:opt progress:^(NSInteger receivedSize, NSInteger expectedSize)
     {
         if (!activityIndicator)
         {
             [weakImageView addSubview:activityIndicator = [UIActivityIndicatorView.alloc initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]];
             activityIndicator.center = CGPointMake(weakImageView.frame.size.width /2, weakImageView.frame.size.height/2);
             // activityIndicator.center = weakImageView.center;
             [activityIndicator setBackgroundColor:[UIColor clearColor]];
             [activityIndicator startAnimating];

         }
     }
                    completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL)
     {

         [activityIndicator removeFromSuperview];
         activityIndicator = nil;
     }];
}

我在didRecdeiveMemoryWarnig方法

中清除了内存

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    NSLog(@"memory warning received in voucher");
    [[SDImageCache sharedImageCache] clearMemory];
    [[SDImageCache sharedImageCache] cleanDisk];
    [[SDImageCache sharedImageCache] setValue:nil forKey:@"memCache"];
}

但它仍然在iPhone 4中崩溃。任何人都可以指导我做什么？

Answer 1

听起来你的应用程序因内存压力而被杀死。也许尝试使用Autorelease Pool来缓解任何内存峰值，因为我认为你在 didReceiveMemoryWarning 中所做的事情在这些情况下并没有真正帮助。