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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 <Foundation/Foundation.h>
#import <objc/runtime.h>
#if __IPHONE_OS_VERSION_MIN_REQUIRED
#import "UIImageView+AFNetworking.h"
@interface AFImageCache : NSCache
- (UIImage *)cachedImageForRequest:(NSURLRequest *)request;
- (void)cacheImage:(UIImage *)image
forRequest:(NSURLRequest *)request;
@end
#pragma mark -
static char kAFImageRequestOperationObjectKey;
@interface UIImageView (_AFNetworking)
@property (readwrite, nonatomic, retain, setter = af_setImageRequestOperation:) AFImageRequestOperation *af_imageRequestOperation;
@end
@implementation UIImageView (_AFNetworking)
@dynamic af_imageRequestOperation;
@end
#pragma mark -
@implementation UIImageView (AFNetworking)
- (AFHTTPRequestOperation *)af_imageRequestOperation {
return (AFHTTPRequestOperation *)objc_getAssociatedObject(self, &kAFImageRequestOperationObjectKey);
}
- (void)af_setImageRequestOperation:(AFImageRequestOperation *)imageRequestOperation {
objc_setAssociatedObject(self, &kAFImageRequestOperationObjectKey, imageRequestOperation, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
+ (NSOperationQueue *)af_sharedImageRequestOperationQueue {
static NSOperationQueue *_af_imageRequestOperationQueue = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_af_imageRequestOperationQueue = [[NSOperationQueue alloc] init];
[_af_imageRequestOperationQueue setMaxConcurrentOperationCount:NSOperationQueueDefaultMaxConcurrentOperationCount];
});
return _af_imageRequestOperationQueue;
}
+ (AFImageCache *)af_sharedImageCache {
static AFImageCache *_af_imageCache = nil;
static dispatch_once_t oncePredicate;
dispatch_once(&oncePredicate, ^{
_af_imageCache = [[AFImageCache alloc] init];
});
return _af_imageCache;
}
#pragma mark -
- (void)setImageWithURL:(NSURL *)url {
[self setImageWithURL:url placeholderImage:nil];
}
- (void)setImageWithURL:(NSURL *)url
placeholderImage:(UIImage *)placeholderImage
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPShouldHandleCookies:NO];
[request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
[self setImageWithURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
}
- (void)setImageWithURLRequest:(NSURLRequest *)urlRequest
placeholderImage:(UIImage *)placeholderImage
success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image))success
failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure
{
[self cancelImageRequestOperation];
UIImage *cachedImage = [[[self class] af_sharedImageCache] cachedImageForRequest:urlRequest];
if (cachedImage) {
self.image = cachedImage;
self.af_imageRequestOperation = nil;
if (success) {
success(nil, nil, cachedImage);
}
} else {
self.image = placeholderImage;
AFImageRequestOperation *requestOperation = [[AFImageRequestOperation alloc] initWithRequest:urlRequest];
[requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
if ([[urlRequest URL] isEqual:[[self.af_imageRequestOperation request] URL]]) {
self.image = responseObject;
self.af_imageRequestOperation = nil;
}
if (success) {
success(operation.request, operation.response, responseObject);
}
[[[self class] af_sharedImageCache] cacheImage:responseObject forRequest:urlRequest];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
if ([[urlRequest URL] isEqual:[[self.af_imageRequestOperation request] URL]]) {
self.af_imageRequestOperation = nil;
}
if (failure) {
failure(operation.request, operation.response, error);
}
}];
self.af_imageRequestOperation = requestOperation;
[[[self class] af_sharedImageRequestOperationQueue] addOperation:self.af_imageRequestOperation];
}
}
- (void)cancelImageRequestOperation {
[self.af_imageRequestOperation cancel];
self.af_imageRequestOperation = nil;
}
@end
#pragma mark -
static inline NSString * AFImageCacheKeyFromURLRequest(NSURLRequest *request) {
return [[request URL] absoluteString];
}
@implementation AFImageCache
- (UIImage *)cachedImageForRequest:(NSURLRequest *)request {
switch ([request cachePolicy]) {
case NSURLRequestReloadIgnoringCacheData:
case NSURLRequestReloadIgnoringLocalAndRemoteCacheData:
return nil;
default:
break;
}
return [self objectForKey:AFImageCacheKeyFromURLRequest(request)];
}
- (void)cacheImage:(UIImage *)image
forRequest:(NSURLRequest *)request
{
if (image && request) {
[self setObject:image forKey:AFImageCacheKeyFromURLRequest(request)];
}
}
@end
#endif
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