接收與AFHTTPClient錯誤響應呼籲

Question

我執行AFHTTPClient作爲一個單獨的類，如文檔建議，並呼籲與在後JSON數據，並接收返回JSON數據：

[[BMNetworkCalls sharedInstance] postPath:theURL parameters:theDict success:^(AFHTTPRequestOperation *operation, id responseObject) { 
    NSLog(@"my return is: %@", [responseObject valueForKeyPath:@"Result"]); 

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {    
    NSLog(@"error in network call: %@", [error localizedDescription]); 
}]; 

一切都很好，但如果我收到一個錯誤，（「HTTPRequestOperation中的錯誤：預期的狀態碼在（200-299），得到了400」），我實際上想要在這裏讀取響應對象（這是我使用的API告訴我我造成的錯誤類別）。

我能做到這一點使用AFJSONRequestOperation：

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) { 
    NSLog(@"my return is: %@", [JSON valueForKeyPath:@"Result"]); 

} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) { 
    NSLog(@"exception code: %@", [JSON valueForKeyPath:@"ExceptionCode"]); 
    NSLog(@"exception message: %@", [JSON valueForKeyPath:@"ExceptionMessage"]); 
}]; 
[operation start]; 

我怎麼能（？，可以我）不使用AFHTTPClient呢？

Answer 1

的operation：

- (void) myPostPath:(NSString *)path 
     parameters:(NSDictionary *)parameters 
      success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, id JSON))success 
      failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON))failure 
{ 
    NSURLRequest *request = [self requestWithMethod:@"POST" path:path parameters:parameters]; 
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:success failure:failure]; 
    [self enqueueHTTPRequestOperation:operation]; 
} 

我通過把它變量有你需要的一切：

[[BMNetworkCalls sharedInstance] postPath:theURL parameters:theDict success:^(AFHTTPRequestOperation *operation, id responseObject) { 
    // ... 
} failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
    if ([operation isKindOfClass:[AFJSONRequestOperation class]]) { 
     id JSON = [(AFJSONRequestOperation *)operation responseJSON]; 
     NSLog(@"JSON: %@", JSON) 
    } 
}]; 

Answer 2

所有功勞歸於@ phix23，他指出我的方向正確！

下面是自定義的方法我在子類AFHTTPClient寫道，讓我看到了JSON響應接收一個400錯誤後：

[[BMNetworkCalls sharedInstance] myPostPath:theURL parameters:theDict success:^(NSURLRequest *request, NSHTTPURLResponse *response, id responseObject) { 
    NSLog(@"my return is: %@", [responseObject valueForKeyPath:@"Result"]); 

} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {   
    NSLog(@"exception code: %@", [JSON valueForKeyPath:@"ExceptionCode"]); 
}];