iOS UI04_Target-Action

////  MyButton.h//  UI04_Target-Action////  Created by dllo on 15/8/3.//  Copyright (c) 2015年 zhozhicheng. All rights reserved.//#import <UIKit/UIKit.h>@interface MyButton : UIView//通过MyButton实现button的点击效果//1.通过自定义的方法,把目标和动作传到类的内部-(void)addTarget:(id)target Action:(SEL)action;//target:目标,button执行哪一个类的方法,对应的目标就是那个类的对象//action:动作,让button具体做什么事,执行的方法就是对应的动作//2.通过两条属性,把对应的目标和动作保存起来@property(nonatomic,assign)id target;@property(nonatomic,assign)SEL action;@end

////  MyButton.m//  UI04_Target-Action////  Created by dllo on 15/8/3.//  Copyright (c) 2015年 zhozhicheng. All rights reserved.//#import "MyButton.h"@implementation MyButton-(void)addTarget:(id)target Action:(SEL)action{    //3.实现对应的自定义方法,并且让两个属性来保存对应的目标和动作    self.action=action;    self.target=target;}//4.给Button一个触发的条件,重写触摸方法,只要一触碰touchBegan方法,就会让button执行相应点击方法-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    //5.类把他的方法交给MyButton来完成    [self.target performSelector:self.action withObject:self];}@end

////  MainViewController.m//  UI04_Target-Action////  Created by dllo on 15/8/3.//  Copyright (c) 2015年 zhozhicheng. All rights reserved.//#import "MainViewController.h"#import "MyButton.h"@interface MainViewController ()@end@implementation MainViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.    // 通过UIView来模拟一个Button点击    MyButton *myButton=[[MyButton alloc] initWithFrame:CGRectMake(100, 100, 150, 40)];    myButton.backgroundColor=[UIColor yellowColor];    myButton.layer.borderWidth=1;    myButton.layer.cornerRadius=10;    [self.view addSubview:myButton];    [myButton release];    //6.使用自定义的方法    [myButton addTarget:self Action:@selector(click:)];}-(void)click:(UIButton *)button{    NSLog(@"实现点击效果");}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end