- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    //直接传是没反应的，去掉其中的空格

    NSString *url=[[NSString stringWithFormat:@"http://baidu.com"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSLog(@"--url--%@",url);

}

2015-10-23 13:28:29.927 get请求去掉url中的空格[8241:214463] --url--http://baidu.com