試圖做一個函數來處理AFNetworking

Question

我想做一個函數，我會調用來處理AFNetworking JSON解析。

這裏是我的代碼：

- (int)startParseWithParameters:(NSDictionary*)incomingParameters andUrlAdress:(NSString*)urlAdress; 
{ 
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; 
    manager.responseSerializer = [AFJSONResponseSerializer serializer]; 

    NSDictionary *parameters = incomingParameters; 
    [manager POST:urlAdress parameters:parameters success:^ 

    (AFHTTPRequestOperation *operation, id responseObject) 
    { 
     NSString *recivedErr = responseObject[@"error"]; 
     _errValue = [recivedErr intValue]; 

     NSLog(@"JSON: %d", _errValue); 
    } 

    failure:^(AFHTTPRequestOperation *operation, NSError *error) 
    { 
     NSLog(@"Error: %@", error); 
    }]; 

    return _errValue; 
} 

我希望函數返回0或1，那麼我就會知道，如果有錯誤或沒有。 現在它總是返回0.

當我嘗試返回成功塊時，出現編譯器錯誤。

什麼可能導致此問題？

Answer 1

的更迭塊異步，所以你應該只調用塊中的方法來處理：

- (void)startParseWithParameters:(NSDictionary*)incomingParameters andUrlAdress:(NSString*)urlAdress { 
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; 
    manager.responseSerializer = [AFJSONResponseSerializer serializer]; 

    NSDictionary *parameters = incomingParameters; 
    __weak typeof(self) weakSelf = self; 
    [manager POST:urlAdress parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) { 


     NSString *recivedErr = responseObject[@"error"]; 
     [weakSelf didReceiveResponse:[recivedErr integerValue]; 
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
     NSLog(@"Error: %@", error); 
    }]; 
} 

-(void)didReceiveResponse:(NSInteger)status { 
}