UI3

// // ViewController.m // UI3_视图切换 // // Created by zhangxueming on 15/7/3. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import "ViewController.h" #import "SecondViewController.h" #import "ThirdViewController.h" #import "FourthViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.view.backgroundColor = [UIColor redColor]; SecondViewController *secondVC = [[SecondViewController alloc] init]; ThirdViewController *thirdVC = [[ThirdViewController alloc] init]; FourthViewController *fouthVC = [[FourthViewController alloc] init]; [self addChildViewController:secondVC]; [self addChildViewController:thirdVC]; [self addChildViewController:fouthVC]; NSLog(@"count = %li", self.childViewControllers.count); UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeSystem]; btn1.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50); btn1.backgroundColor = [UIColor whiteColor]; [btn1 setTitle:@"按钮1" forState:UIControlStateNormal]; [btn1 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside]; btn1.tag = 100; [self.view addSubview:btn1]; UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeSystem]; btn2.frame = CGRectMake(20, 200, self.view.frame.size.width-40, 50); btn2.backgroundColor = [UIColor whiteColor]; [btn2 setTitle:@"按钮2" forState:UIControlStateNormal]; [btn2 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside]; btn2.tag = 101; [self.view addSubview:btn2]; UIButton *btn3 = [UIButton buttonWithType:UIButtonTypeSystem]; btn3.frame = CGRectMake(20, 300, self.view.frame.size.width-40, 50); btn3.backgroundColor = [UIColor whiteColor]; [btn3 setTitle:@"按钮3" forState:UIControlStateNormal]; [btn3 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside]; btn3.tag = 102; [self.view addSubview:btn3]; } - (void)btnClicked:(UIButton *)btn { //self.childViewControllers if (btn.tag==100) { [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:0]).view]; } else if(btn.tag ==101) { [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:1]).view]; } else if(btn.tag ==102) { [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:2]).view]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end

 

// // FourthViewController.m // UI3_视图切换 // // Created by zhangxueming on 15/7/3. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import "FourthViewController.h" @interface FourthViewController () @end @implementation FourthViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor yellowColor]; UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50); btn.backgroundColor = [UIColor whiteColor]; [btn setTitle:@"按钮" forState:UIControlStateNormal]; [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; } - (void)btnClicked { if (self.view.superview) { //移除子视图 [self.view removeFromSuperview]; } } - (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

 

// // ThirdViewController.m // UI3_视图切换 // // Created by zhangxueming on 15/7/3. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import "ThirdViewController.h" @interface ThirdViewController () @end @implementation ThirdViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor greenColor]; UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50); btn.backgroundColor = [UIColor whiteColor]; [btn setTitle:@"按钮" forState:UIControlStateNormal]; [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; } - (void)btnClicked { if (self.view.superview) { //移除子视图 [self.view removeFromSuperview]; } } - (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

 

// // SecondViewController.m // UI3_视图切换 // // Created by zhangxueming on 15/7/3. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import "SecondViewController.h" @interface SecondViewController () @end @implementation SecondViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor blueColor]; UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50); btn.backgroundColor = [UIColor whiteColor]; [btn setTitle:@"按钮" forState:UIControlStateNormal]; [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; } - (void)btnClicked { if (self.view.superview) { //移除子视图 [self.view removeFromSuperview]; } } - (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

 

转载于:https://www.cnblogs.com/0515offer/p/4638609.html