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UIImageView+AFNetworking.m
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UIImageView+AFNetworking.m
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// UIImageView+AFNetworking.m
//
// Copyright (c) 2011 Gowalla (http://gowalla.com/)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "UIImageView+AFNetworking.h"
#import "AFImageCache.h"
static NSString * const kUIImageViewImageRequestObjectKey = @"imageRequestOperation";
@interface UIImageView (_AFNetworking)
@property (readwrite, nonatomic, retain) AFImageRequestOperation *imageRequestOperation;
@end
@implementation UIImageView (_AFNetworking)
@dynamic imageRequestOperation;
@end
#pragma mark -
@implementation UIImageView (AFNetworking)
- (AFHTTPRequestOperation *)imageRequestOperation {
return objc_getAssociatedObject(self, kUIImageViewImageRequestObjectKey);
}
- (void)setImageRequestOperation:(AFImageRequestOperation *)imageRequestOperation {
objc_setAssociatedObject(self, kUIImageViewImageRequestObjectKey, imageRequestOperation, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
+ (NSOperationQueue *)sharedImageRequestOperationQueue {
static NSOperationQueue *_imageRequestOperationQueue = nil;
if (!_imageRequestOperationQueue) {
_imageRequestOperationQueue = [[NSOperationQueue alloc] init];
[_imageRequestOperationQueue setMaxConcurrentOperationCount:6];
}
return _imageRequestOperationQueue;
}
- (void)setImageWithURL:(NSURL *)url {
[self setImageWithURL:url placeholderImage:nil];
}
- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage {
[self setImageWithURL:url placeholderImage:placeholderImage imageSize:self.frame.size options:AFImageRequestDefaultOptions];
}
- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage imageSize:(CGSize)imageSize options:(AFImageRequestOptions)options {
if (!url) {
return;
}
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageAllowed timeoutInterval:30.0];
[request setHTTPShouldHandleCookies:NO];
[request setHTTPShouldUsePipelining:YES];
UIImage *cachedImage = [[AFImageCache sharedImageCache] cachedImageForRequest:request imageSize:imageSize options:options];
if (cachedImage) {
self.image = cachedImage;
} else {
self.image = placeholderImage;
self.imageRequestOperation = [AFImageRequestOperation operationWithRequest:request imageSize:imageSize options:options success:^(UIImage *image) {
if ([[request URL] isEqual:[[self.imageRequestOperation request] URL]]) {
self.image = image;
} else {
self.image = placeholderImage;
}
}];
[[[self class] sharedImageRequestOperationQueue] addOperation:self.imageRequestOperation];
}
}
@end