RestKit iOS - 第二次失败

Question

我正在使用RestKit进行返回JSON数据的简单请求。我已经实现了这段代码，它仅在第一次调用 viewDidLoad 时有效，第二次不执行请求时有效。为什么？？

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self planOtpTrip];
}
-(void) planOtpTrip{
        NSLog(@"[INFO] planoOtpTrip");
        client = [RKClient clientWithBaseURLString:@"http://myserver/opentripplanner-api-webapp/ws"];
        [client setValue:@"application/json" forHTTPHeaderField:@"Accept"]; 
        NSDictionary *queryParameters = [NSDictionary dictionaryWithObjectsAndKeys:@"45.028952,7.624598",@"fromPlace",@"45.06123,7.65981", @"toPlace",@"TRANSIT,WALK" ,@"mode", nil];

        // Imposto il nome della API da richiamare
        NSString *getResourcePath = RKPathAppendQueryParams(@"/plan", queryParameters);
        [client get:getResourcePath delegate:self];
    }
    - (void)request:(RKRequest*)request didLoadResponse:(RKResponse*)response {
        // where you handle response object
        NSLog(@"Risposta ricevuta: %@", response.URL);  
        NSLog(@"Response Body: %@", response.bodyAsString);
        id jsonParser = [[RKParserRegistry sharedRegistry] parserForMIMEType:RKMIMETypeJSON];
        NSError *error = nil;
        NSDictionary* parsedResponse = [jsonParser objectFromString:[response bodyAsString] error:&error];
        if (error == nil)
        {
            NSLog(@"GET returned with HTTP Code %d and parsedContent: %@", [response statusCode], parsedResponse);
        }
        else
        {
            NSLog(@"Error: %@", error);
        }

        return [self renderResponse:parsedResponse];

    }

Answer 1

我也遇到了这个问题，但我找到了解决方案。在 .h 文件中定义 RKClient，如下所示：

@property (retain) RKClient *downloadClient;

然后在您的 .m 文件中合成下载客户端，如下所示：

@synthesize downloadClient;

然后在您的didLoadResponse方法中，当您完成下载客户端时，您可以释放它，如下所示：

- (void)request:(RKRequest*)request didLoadResponse:(RKResponse*)response
{
//do something with your response
[downloadClient release];
}