Question

输入接口URL能得到值，POST请求返回的值为空

Answer 1

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self CellTaxiTextForStarting:@"beijing" andDestination:@"Bibb" andUid:131];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)CellTaxiTextForStarting:(NSString *)theStarting andDestination:(NSString *)theDestination andUid:(int)theUid{
    NSString
 *URLString=[NSString 
stringWithFormat:@"http://1.82.230.175/2014/20140409_dd/api.php/Index/jcBySkInputAddress/fromAddress/%@/address/%@/uid/%d",theStarting,theDestination,theUid];

    NSError *error = nil;
    NSData *rest=[self synHttpPost:URLString ParamName:@"" ParamValue:nil];
    NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:rest options:NSJSONReadingMutableLeaves error:&error];
    
    NSLog(@"%@",jsonData);
    int YesOrNo=[jsonData[@"YesOrNo"] intValue];
    NSString *a=jsonData[@"info"];
    NSLog(@"%d:%@",YesOrNo,a);
}
//同步post请求
- (id)synHttpPost:(NSString *)urlAsString ParamName:(NSString *)bodyParam1 ParamValue:(NSString *)bodyValue1{
    NSURL *url = [NSURL URLWithString:urlAsString];
    __block NSString *resault=@"";
    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
    [urlRequest setTimeoutInterval:30];
    [urlRequest setHTTPMethod:@"GET"];
//    NSString *body =bodyParam1;
//    body = [body stringByAppendingString:@"="];
//    body= [body stringByAppendingString:[NSString stringWithFormat:@"%@",bodyValue1]];
//    [urlRequest setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
    NSURLResponse *response = nil;
    NSError *error = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:urlRequest
                                         returningResponse:&response
                                                     error:&error];
    if ([data length] > 0 &&
        error == nil){
        resault = [[NSString alloc] initWithData:data
                                        encoding:NSUTF8StringEncoding];
    }
    else if ([data length] == 0 &&
             error == nil){
        resault=nil;
    }
    else if (error != nil){
        resault=nil;
    }
    return data;
}