Iphone 使用返回并获取参数的块

因此，在AFNetworking中，有如下功能：

+ (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
{

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

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

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

        }];

我尝试使用它如下：

+ (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
{

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

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

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

        }];

---

但是，在UIImage部分，它似乎并不正确。。有什么想法吗？

你差不多做到了-你的代码在第一个块中缺少图像的参数名：

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

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

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

}];

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