| #import <AFNetworking.h> | |
| @interface UIImageView (AFNetworkingFadeInAdditions) | |
| - (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage fadeInWithDuration:(CGFloat)duration; | |
| @end |
| #import "UIImageView+AFNetworkingFadeInAdditions.h" | |
| @implementation UIImageView (AFNetworkingFadeInAdditions) | |
| - (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage fadeInWithDuration:(CGFloat)duration { | |
| NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; | |
| [request setHTTPShouldHandleCookies:NO]; | |
| [request addValue:@"image/*" forHTTPHeaderField:@"Accept"]; | |
| __weak typeof (self) weakSelf = self; | |
| [self setImageWithURLRequest:request placeholderImage:placeholderImage success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) { | |
| if (!request) // image was cached | |
| [weakSelf setImage:image]; | |
| else | |
| [UIView transitionWithView:weakSelf duration:duration options:UIViewAnimationOptionTransitionCrossDissolve animations:^{ | |
| [weakSelf setImage:image]; | |
| } completion:nil]; | |
| } failure:nil]; | |
| } | |
| @end |
Add AFNetworking to your project (eg. via cocoapods.org), copy these two files into your project, then
#import UIImageView+AFNetworkingFadeInAdditions.h
and use it like this:
[imageView setImageWithURL:myNSURL placeholderImage:someUIImageOrNil fadeInWithDuration:0.2f];
After tweaking your example, it seems to be that:
if (!request) // image was cachedshould be changed to:
if (!response) // image was cachedAFNetworking returns a nil response, not a nil request when retrieved from the cache.