How to get frame of image when using MKNetworkKit setImageFromURL? - iphone

Question

I am trying to get the size of an image after it is downloaded using setImageFromURL:
UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
[UIImageView setDefaultEngine:appDelegate.imageCache];
[img setImageFromURL:[NSURL URLWithString:#"http://testurl.com/testimg.jpg"]];
//img.frame = CGRectMake (0, 0, img.image.size.width, img.image.size.height);
[self.view addSubview:img];
I'm using MKNetworkKit -- is there a way to add a completion handler to the setImageFromURL method?

Answer 1

You can apply your own completion block
Few comments, please use Grand Central Dispatch to improve code efficiency and multi-core utilization for this kind of situations.
Example:
- (void) setImageFromUrl:(NSString*)urlString {
[self setImageFromUrl:urlString completion:NULL];
}
- (void) setImageFromUrl:(NSString*)urlString
completion:(void (^)(void))completion {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSLog(#"Starting: %#", urlString);
UIImage *avatarImage = nil;
NSURL *url = [NSURL URLWithString:urlString];
NSData *responseData = [NSData dataWithContentsOfURL:url];
avatarImage = [UIImage imageWithData:responseData];
NSLog(#"Finishing: %#", urlString);
if (avatarImage) {
dispatch_async(dispatch_get_main_queue(), ^{
self.image = avatarImage;
//Assign the image to ur ImageView.
//get the image frame from ur ImageView.frame
});
dispatch_async(dispatch_get_main_queue(), completion);
}
else {
NSLog(#"-- impossible download: %#", urlString);
}
});
}
For more details , please visit iOS GCD magic

Answer 2

I was able to do it by adding this line:
self.frame = CGRectMake(0, 0, fetchedImage.size.width, fetchedImage.size.height);
to UIImageView+MKNetworkKitAdditions.m:
if(imageCacheEngine) {
self.imageFetchOperation = [imageCacheEngine imageAtURL:url
size:self.frame.size
completionHandler:^(UIImage *fetchedImage, NSURL *url, BOOL isInCache) {
self.frame = CGRectMake(0, 0, fetchedImage.size.width, fetchedImage.size.height);
[UIView transitionWithView:self.superview
duration:isInCache?kFromCacheAnimationDuration:kFreshLoadAnimationDuration
options:UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionAllowUserInteraction
animations:^{
self.image = fetchedImage;
} completion:nil];
//[[NSNotificationCenter defaultCenter] postNotificationName:KW_IMAGE_LOADED object:nil];
} errorHandler:^(MKNetworkOperation *completedOperation, NSError *error) {
DLog(#"%#", error);
}];
} else {
DLog(#"No default engine found and imageCacheEngine parameter is null")
}