uilabel - Uilabel Tap 手势崩溃

Question

我有点击手势的问题，我有一个视图控制器，在视图控制器的顶部动态添加 UILABEL 并将点击手势添加到标签。当点击 Uilabel 时，它会崩溃。

[ViewController singleTap:]：发送到实例的无法识别的选择器：- 崩溃报告

下面是一段代码

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(30, 0, 150, 35)];
    label.userInteractionEnabled = YES;
    label.backgroundColor = [UIColor greenColor];
    label.text = @"label";
    label.textAlignment = NSTextAlignmentCenter;

    UITapGestureRecognizer * single = [[UITapGestureRecognizer alloc] initWithTarget:self     action:@selector(singleTap:)];
    [label addGestureRecognizer:single];
    single.numberOfTapsRequired = 1;
    [single release];

    [self.view addSubview:label];


}
-(void) singletap:(id)sender
{
    NSLog(@"single tap");
}

Answer 1

它应该是-(void) singleTap:(id)sender大写的T。