使用塊返回和AFNetworking需要一個參數

Question

因此，有一個函數如下：

+ (AFImageRequestOperation *)imageRequestOperationWithRequest:(NSURLRequest *)urlRequest 
             imageProcessingBlock:(UIImage *(^)(UIImage *))imageProcessingBlock 
                cacheName:(NSString *)cacheNameOrNil 
                 success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image))success 
                 failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure 
{ 

我想使用它，如下所示：

[AFImageRequestOperation imageRequestOperationWithRequest:nil imageProcessingBlock:^UIImage * (UIImage *) { 

     }cacheName:@"nsurl" success:^(NSURLRequest *request, NSHTTPURLResponse * response, UIImage * image){ 

     }failure:^(NSURLRequest *request, NSHTTPURLResponse * response, NSError * error){ 

     }]; 

但是似乎它不在UIImage部分是正確的..任何想法？

Answer 1

你就要成功了 - 你的代碼在第一個塊中的圖像是缺少一個參數名：

[AFImageRequestOperation imageRequestOperationWithRequest:nil imageProcessingBlock:^UIImage * (UIImage *image) { // <<== HERE 

} cacheName:@"nsurl" success:^(NSURLRequest *request, NSHTTPURLResponse * response, UIImage * image){ 

}failure:^(NSURLRequest *request, NSHTTPURLResponse * response, NSError * error){ 

}]; 

我覺得這是在Xcode中的錯誤，因爲它擴大了簽名爲您發佈正是，沒有參數名稱。