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Support using NSCache delegate with SDMemoryCache default implementation

This commit is contained in:
Ben Cherry 2019-11-26 10:22:35 -08:00
parent 74526bdde4
commit dd2c5263c8
2 changed files with 9 additions and 7 deletions
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9
SDWebImage/Core/SDMemoryCache.h
View File

@ -15,6 +15,7 @@
@protocol SDMemoryCache <NSObject>
@required
/**
Create a new memory cache instance with the specify cache config. You can check `maxMemoryCost` and `maxMemoryCount` used for memory cache.
@ -25,7 +26,7 @@
/**
Returns the value associated with a given key.
@param key An object identifying the value. If nil, just return nil.
@return The value associated with key, or nil if no value is associated with key.
*/
@ -33,7 +34,7 @@
/**
Sets the value of the specified key in the cache (0 cost).
@param object The object to be stored in the cache. If nil, it calls `removeObjectForKey:`.
@param key The key with which to associate the value. If nil, this method has no effect.
@discussion Unlike an NSMutableDictionary object, a cache does not copy the key
@ -44,7 +45,7 @@
/**
Sets the value of the specified key in the cache, and associates the key-value
pair with the specified cost.
@param object The object to store in the cache. If nil, it calls `removeObjectForKey`.
@param key The key with which to associate the value. If nil, this method has no effect.
@param cost The cost with which to associate the key-value pair.
@ -55,7 +56,7 @@
/**
Removes the value of the specified key in the cache.
@param key The key identifying the value to be removed. If nil, this method has no effect.
*/
- (void)removeObjectForKey:(nonnull id)key;

7
SDWebImage/Core/SDMemoryCache.m
View File

@ -30,6 +30,7 @@ static void * SDMemoryCacheContext = &SDMemoryCacheContext;
#if SD_UIKIT
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidReceiveMemoryWarningNotification object:nil];
#endif
self.delegate = nil;
}
- (instancetype)init {
@ -54,14 +55,14 @@ static void * SDMemoryCacheContext = &SDMemoryCacheContext;
SDImageCacheConfig *config = self.config;
self.totalCostLimit = config.maxMemoryCost;
self.countLimit = config.maxMemoryCount;
[config addObserver:self forKeyPath:NSStringFromSelector(@selector(maxMemoryCost)) options:0 context:SDMemoryCacheContext];
[config addObserver:self forKeyPath:NSStringFromSelector(@selector(maxMemoryCount)) options:0 context:SDMemoryCacheContext];
#if SD_UIKIT
self.weakCache = [[NSMapTable alloc] initWithKeyOptions:NSPointerFunctionsStrongMemory valueOptions:NSPointerFunctionsWeakMemory capacity:0];
self.weakCacheLock = dispatch_semaphore_create(1);
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(didReceiveMemoryWarning:)
name:UIApplicationDidReceiveMemoryWarningNotification