60 lines
2.2 KiB
Objective-C
60 lines
2.2 KiB
Objective-C
// AFImageCache.m
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//
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// Copyright (c) 2011 Gowalla (http://gowalla.com/)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#import "AFImageCache.h"
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static inline NSString * AFImageCacheKey(NSURLRequest *urlRequest, CGSize imageSize, AFImageRequestOptions options) {
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return [[[urlRequest URL] absoluteString] stringByAppendingFormat:@"#%fx%f:%d", imageSize.width, imageSize.height, options];
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}
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@implementation AFImageCache
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+ (id)sharedImageCache {
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static NSCache *_sharedImageCache = nil;
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if (!_sharedImageCache) {
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_sharedImageCache = [[self alloc] init];
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}
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return _sharedImageCache;
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}
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- (UIImage *)cachedImageForRequest:(NSURLRequest *)urlRequest
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imageSize:(CGSize)imageSize
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options:(AFImageRequestOptions)options
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{
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return [self objectForKey:AFImageCacheKey(urlRequest, imageSize, options)];
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}
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- (void)cacheImage:(UIImage *)image
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forRequest:(NSURLRequest *)urlRequest
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imageSize:(CGSize)imageSize
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options:(AFImageRequestOptions)options
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{
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if (!image) {
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return;
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}
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[self setObject:image forKey:AFImageCacheKey(urlRequest, imageSize, options)];
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}
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@end
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