HTTP的网址的验证

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    NSLog(@"---isUrl--%i--",[self isUrl:@"http://www.itjhwd.com/iosgyzz/"]);
    
}

//用正则表达式
- (BOOL)isUrl:(NSString *)url
{
    NSString *      regex = @"http(s)?:\\/\\/([\\w-]+\\.)+[\\w-]+(\\/[\\w- .\\/?%&=]*)?";
    NSPredicate *   pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    
    return [pred evaluateWithObject:url];
}