自定义UILabel，接受触摸事件

#import <UIKit/UIKit.h>

@interface myLabel : UILabel

@end

#import "myLabel.h"

@implementation myLabel

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"myLabel touch");
}

@end

#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor greenColor]];
    
    myLabel *label = [[myLabel alloc] init];
    label.frame = CGRectMake(60, 100, 200, 50);
    label.text = @"Hello world";
    label.backgroundColor = [UIColor blueColor];
    
    label.userInteractionEnabled = YES;
    
    [self.view addSubview:label];
}

　19  - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

  20  　　NSLog(@"viewController touch");

  21 }

如果label.userInteractionEnabled = NO; (默认值)，当用户点击label时将显示“viewController touch”。

如果在myLabe中加入：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"myLabel touch");
    [self.nextResponder touchesBegan:touches withEvent:event];  // 接受到事件后继续向上传递事件
}