UILabel添加點擊事件

爲UILable添加點擊事件，首先必須設置UILabel的userInteractionEnabled = YES，添加的點擊事件纔會有效，否則無效。
首先設置label1和label2兩個屬性，這裏label1的點擊原理是判斷點擊的座標是否在label1的範圍內，如果在範圍內的話就變藍色，否則變紅色，label1的代碼被註釋了，爲了測試label2。
label2是直接給label2添加單擊事件
具體代碼如下：

@implementation ViewController

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

//    UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap1:)];
//    [self.view addGestureRecognizer:tap1];

    UITapGestureRecognizer *uiTap2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap2:)];
    self.label2.userInteractionEnabled = YES;
    [self.label2 addGestureRecognizer:uiTap2];
}

- (void)tap1:(UITapGestureRecognizer *)param{
    NSLog(@"--------");
    CGPoint point = [param locationInView:self.view];
    if(CGRectContainsPoint(_label1.frame, point)){//如果單擊的座標在label範圍之內，則變藍色，否則變紅色
        _label1.backgroundColor = [UIColor blueColor];
    } else {
        _label1.backgroundColor = [UIColor redColor];
    }
}

- (void)tap2:(UITapGestureRecognizer *)param{
    NSLog(@"=========");
}

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

@end