我刚从 ASIHTTP 转移到 AFNetworking 库。我还在使用 Olivier Poitrey 和 Peter Steinberg 的 SDURLCache 库。我想缓存我将在我的应用程序中使用的所有图像。对于这些，我尝试了这个：
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
for(NSURLRequest *imageRequest in imageRequestArray){
AFURLConnectionOperation *operation2 = [[[AFURLConnectionOperation alloc] initWithRequest:imageRequest] autorelease];
[queue addOperation: operation2];
[operation2 waitUntilFinished];
}
当我需要显示图像时，我对每张图像都这样做：
NSURL *url = [NSURL URLWithString:[cat imagePath]];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:30.0];
AFImageRequestOperation *operation = [AFImageRequestOperation imageRequestOperationWithRequest:imageRequest
imageProcessingBlock:nil
cacheName:@"nscache"
success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image){
//NSData *responseData = [request responseData];
imageView.alpha = 0.0;
[imageView setImage:image forState:UIControlStateNormal];
[UIView beginAnimations:@"ToggleViews" context:nil];
[UIView setAnimationDuration:1.0];
imageView.alpha = 1.0;
[UIView commitAnimations];
}
failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error){}
];
[operation start];
一段时间后，应用程序发出内存警告，然后关闭。为此，我做了以下事情：
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
[[NSURLCache sharedURLCache] removeAllCachedResponses];
NSLog(@"Memory Warning...");
}
它清除了缓存（我没有什么），但过了一会儿，应用程序再次关闭。
我该怎么做？