如何響應其他然後狀態代碼200或錯誤（一段時間）

Question

如何再次調用相同的API我在iPhone（目標C）應用程序中使用API​​調用。我的APIS呼叫返回狀態碼200，但有一段時間它返回405響應。當我重新啓動我的應用程序時，我得到了正確的迴應 如何回調相同的API，當我得到其他然後200響應或者如果我得到錯誤...所以我不必重新啓動應用程序。

[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; 

      NSString *authValue = [NSString stringWithFormat:@"Bearer %@", 
      [arrTokenData valueForKey:@"Token"]]; 

      //Configure session with common header fields 
      NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration]; 
     sessionConfiguration.HTTPAdditionalHeaders = @{@"Authorization": authValue}; 

      NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration]; 

      NSString *url = @"http://test.myserver.am/api/mobile/LookUps/getuserdata"; 
      NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; 

      NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
       [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; 
       if (!error) { 
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response; 
        if (httpResponse.statusCode == 200) 
        { 
         //Process the data 
        } 
        else if 
        { 
        // how to call back same API 
        } 
       } 
       else 
       { 
        // how to call back same API 
       } 

      }]; 
      [task resume]; 

在此先感謝

Answer 1

創建一個方法，該方法中編寫代碼，並調用同樣的方法上錯誤，如下面

- (void)callService { 
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; 

    NSString *authValue = [NSString stringWithFormat:@"Bearer %@", 
          [arrTokenData valueForKey:@"Token"]]; 

    //Configure session with common header fields 
    NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration]; 
    sessionConfiguration.HTTPAdditionalHeaders = @{@"Authorization": authValue}; 

    NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration]; 

    NSString *url = @"http://test.myserver.am/api/mobile/LookUps/getuserdata"; 
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; 

    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
     [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; 
     if (!error) { 
      NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response; 
      if (httpResponse.statusCode == 200) 
      { 
       //Process the data 
      } 
      else 
      { 
       // how to call back same API 
       [self callService]; 
      } 
     } 
     else 
     { 
      // how to call back same API 
      [self callService]; 
     } 

    }]; 
    [task resume]; 
} 

Answer 2

我認爲是你創建的網絡電話的一般方法。如果你會得到一個錯誤或200以外的答覆。只需從您的請求中獲取請求詳細信息，然後使用該請求（URL）調用該通用方法即可。

示例代碼：

NSURLSessionDataTask *DataTask = [session dataTaskWithRequest:theRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error){ 
    NSHTTPURLResponse *serverResponse = (NSHTTPURLResponse*)response; 
    if (error == nil) { 
     if (serverResponse.statusCode == 200) { 
      NSString *theXML = [[NSString alloc] initWithBytes: 
           [data bytes] length:[data length] encoding:NSUTF8StringEncoding]; 
      NSLog(@"%@", theXML); 
     } else { 
      NSLog(@"%@, %@", serverResponse.URL, serverResponse.allHTTPHeaderFields); 
      //Call the generic network call method with the above details again 
     } 
    } else { 
     NSLog(@"%@", error. localizedDescription); 
     NSLog(@"%@, %@", serverResponse.URL, serverResponse.allHTTPHeaderFields); 
     //Call the generic network call method with the above details again 
    } 


}]; 
[DataTask resume]; 

創建新的線程，執行失敗的請求。