ios UIButton的点击与松开事件处理

    #import "ViewController.h"

    @interface ViewController ()

    @property (nonatomic, strong) UIButton *testbtn;

    @end

    @implementation ViewController
    @synthesize testbtn;

    - (void)viewDidLoad
    {
        [super viewDidLoad];
   self.testbtn.frame = CGRectMake(10, 10, 50, 50);
        self.testbtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

        [self.testbtn setTitle:@"点击" forState:UIControlStateNormal];
        [self.testbtn setTitle:@"松开" forState:UIControlEventTouchDown];
   //处理按钮点击事件
        [self.testbtn addTarget:self action:@selector(TouchDown)forControlEvents: UIControlEventTouchDownInside];
   //处理按钮松开状态
        [self.testbtn addTarget:self action:@selector(TouchUp)forControlEvents: UIControlEventTouchUpInside | UIControlEventTouchUpOutside];

        [self.view addSubview:self.testbtn];
    }


    - (void)TouchDown
    {
   //这里可以处理其他点击事件
        NSLog(@"按钮点击了");
    }

    - (void)TouchUp
    {
   //这里可以处理其他松开事件
        NSlog(@"按钮松开了");
    }

    @end