iOS-NSURLProtocol的理解与应用

最新推荐文章于 2020-03-02 14:13:21 发布

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本文解析了NSURLProtocol官方文档，介绍了协议实现者必须实现的方法，如开始加载请求、停止加载等，并展示了初始化方法及属性如客户端、请求和缓存响应。

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NSURLProtocol官方文档的理解

官方提供的实例与方法如下:

- (instancetype)initWithRequest:(NSURLRequest *)request cachedResponse:(nullable NSCachedURLResponse *)cachedResponse client:(nullable id <NSURLProtocolClient>)client NS_DESIGNATED_INITIALIZER;

@property (nullable, readonly, retain) id <NSURLProtocolClient> client;

@property (readonly, copy) NSURLRequest *request;

@property (nullable, readonly, copy) NSCachedURLResponse *cachedResponse;

/*======================================================================
  Begin responsibilities for protocol implementors

  The methods between this set of begin-end markers must be
  implemented in order to create a working protocol.
  ======================================================================*/
+ (BOOL)canInitWithRequest:(NSURLRequest *)request;

+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request;

+ (BOOL)requestIsCacheEquivalent:(NSURLRequest *)a toRequest:(NSURLRequest *)b;

- (void)startLoading;

- (void)stopLoading;

/*======================================================================
  End responsibilities for protocol implementors
  ======================================================================*/

+ (nullable id)propertyForKey:(NSString *)key inRequest:(NSURLRequest *)request;

+ (void)setProperty:(id)value forKey:(NSString *)key inRequest:(NSMutableURLRequest *)request;

+ (void)removePropertyForKey:(NSString *)key inRequest:(NSMutableURLRequest *)request;

+ (BOOL)registerClass:(Class)protocolClass;

+ (void)unregisterClass:(Class)protocolClass;