建三个UIViewController 的子控制器,其中一个为根控制器,另外两个控制器的视图作为切换对象
AppDelegate中代码
//AppDelegate.h中代码 #import <UIKit/UIKit.h> @interface AppDelegate : UIResponder <UIApplicationDelegate> @property (retain, nonatomic) UIWindow *window; @end //AppDelegate.m中代码
根视图控制器RootViewController中代码
//RootViewController.h中代码 #import <UIKit/UIKit.h> @interface RootViewController : UIViewController @end //RootViewController.m中代码 #import "RootViewController.h" #import "BlueViewController.h" #import "RedViewController.h" @interface RootViewController () { BlueViewController *_blueview; RedViewController *_redview; } @end @implementation RootViewController -(void)dealloc { [_blueview release]; [_redview release]; [super dealloc]; } - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)change:(UIButton *)button { if (_blueview.view.superview !=nil) { [_blueview.view removeFromSuperview]; [self.view addSubview:_redview.view]; }else{ [_redview.view removeFromSuperview]; [self.view addSubview:_blueview.view]; } } - (void)viewDidLoad { [super viewDidLoad]; //蓝色视图控制器的创建 _blueview = [[BlueViewController alloc] init]; _blueview.view.frame = CGRectMake(0, 0, 320, 440); //添加到根控制器 [self.view addSubview:_blueview.view]; //红色视图控制器创建 _redview = [[RedViewController alloc] init]; _redview.view.frame = CGRectMake(0, 0, 320, 440); //添加到根控制器 [self.view addSubview:_redview.view]; //在根控制器上创建带触发交换事件的按钮 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem]; button.frame = CGRectMake(100, 440, 120, 40); [button setTitle:@"交换" forState:UIControlStateNormal]; button.backgroundColor = [UIColor blackColor]; [button addTarget:self action:@selector(change:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button]; // Do any additional setup after loading the view. } - (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
BlueViewController中代码
//BlueViewController.h中代码 #import <UIKit/UIKit.h> @interface BlueViewController : UIViewController @end //BlueViewController.m中代码 #import "BlueViewController.h" @interface BlueViewController () @end @implementation BlueViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor blueColor]; // Do any additional setup after loading the view. } - (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
RedViewController
//RedViewController.h中代码 #import <UIKit/UIKit.h> @interface RedViewController : UIViewController @end //RedViewController.m中代码 #import "RedViewController.h" @interface RedViewController () @end @implementation RedViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor redColor]; // Do any additional setup after loading the view. } - (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