Bha*_*rat 5 memory-management objective-c ios sdwebimage
我SDWebImage用来从服务器上异步下载图像。服务器上的某些图像大小约为1.5至2 MB。我正在上显示这些图像UICollectionView。多次运行后,我收到内存警告并且应用程序崩溃。有时是在第一次下载图像时发生的,有时是在我上下滚动集合视图时发生的。这是我的代码-
-(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;
}];
}
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并在AppDelegate-
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application
{
[[SDImageCache sharedImageCache] clearMemory];
[[SDImageCache sharedImageCache] cleanDisk];
[[SDImageCache sharedImageCache] clearDisk];
[[SDImageCache sharedImageCache] setValue:nil forKey:@"memCache"];
}
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请不要使用高分辨率(超过3000像素宽度)的图像,例如其中一个图像大小为4256 * 2832,大小为979KB的图像会发出内存警告,请提供任何帮助或建议。 编辑:-我的应用程序由于内存压力而被杀死,但仅在iPhone 4s和更低版本上(在iPhone5及更高版本上可以正常工作)。当下载大图像(或完整下载)时,我突然出现内存峰值(它从〜25mb变为〜90mb),应用崩溃了。有什么建议可做吗?
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