three20的TTURLRequest可以在发请求前获取到时候cache了的状态吗?
在请求完成的时候,request里有一个 respondedFromCache 的属性,bool型的。
定义如下:
/**
* Whether or not the request was loaded from the cache.
*
* This is only valid after the request has completed.
*/
@property (nonatomic) BOOL respondedFromCache;
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