NSURLCache
- Framework
- Foundation
- SDKs
- iOS 8.0+
- macOS 10.10+
- tvOS 9.0+
- watchOS 2.0+
It provides a composite in-memory and on-disk cache, and lets you manipulate the sizes of both the in-memory and on-disk portions. You can also control the path where cache data is stored persistently.
提供内存和磁盘缓存，操纵和分配在内存和磁盘的存储大小，你也可以控制存储的路径
在iOS中，当设备的磁盘空间不足时，在磁盘存储的数据将会被清理
线程安全
在iOS8+,macOS10.10+ NSURLCache是线程安全的。
@property(class, strong) NSURLCache *sharedURLCache;
返回NSURLCache实例
- (instancetype)initWithMemoryCapacity:(NSUInteger)memoryCapacity diskCapacity:(NSUInteger)diskCapacity diskPath:(NSString *)path;
初始化NSURLCache指定值,MemoryCapacity与memoryCapacity指定了缓存大小（bytes）diskPath指定磁盘位置
- (NSCachedURLResponse *)cachedResponseForRequest:(NSURLRequest *)request;
返回一个被缓存过的响应请求
- (void)storeCachedResponse:(NSCachedURLResponse *)cachedResponse forRequest:(NSURLRequest *)request;
存储缓存的URL响应的请求。
- (void)getCachedResponseForDataTask:(NSURLSessionDataTask *)dataTask completionHandler:(void (^)(NSCachedURLResponse *cachedResponse))completionHandler;
No overview available.
- (void)storeCachedResponse:(NSCachedURLResponse *)cachedResponse forDataTask:(NSURLSessionDataTask *)dataTask;
No overview available.
- (void)removeCachedResponseForRequest:(NSURLRequest *)request;
清除缓存
- (void)removeCachedResponseForDataTask:(NSURLSessionDataTask *)dataTask;
No overview available.
- (void)removeCachedResponsesSinceDate:(NSDate *)date;
No overview available. 从什么时间开始清除缓存
- (void)removeAllCachedResponses;
No overview available. 移除所有缓存请求
@property(readonly) NSUInteger currentDiskUsage;
当前存储在磁盘中的存储大小，bytes字段
@property NSUInteger diskCapacity;
磁盘存储容量
@property(readonly) NSUInteger currentMemoryUsage;
当前存储在内存中的存储大小，bytes字段
@property NSUInteger memoryCapacity;
内存中存储容量
