IPhone多视图切换

处理IPhone多个view切换是我们常遇到的问题，接下来有个比较实用的方法：

而且还附有创建空项目,内存告急处理和动画效果的实现！

具体步骤：

1.创建一个空的项目，然后添加一个ViewController，勾选上with xib文件，点击到xib文件看看File's Owner属性是否是当前的ViewController,如果不是，手动填写一下，并将他的view属性拖向当前的view，view如果改成UIController，那么该view就具备事件

2.修改AppDelegate.h

@class DXWViewController;

@property (strong, nonatomic) DXWViewController *viewController;

3.修改AppDelegate.m

首先在dealloc中添加

[_viewController release];

接着是添加

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

    self.viewController = [[[DXWViewController alloc] initWithNibName:@"DXWViewController" bundle:nil] autorelease];

    self.window.rootViewController = self.viewController;

    [self.window makeKeyAndVisible];

    return YES;

}

上面是讲从0开始创建一个启动项目，下面是做一个多视图切换的功能

4.截下来是创建三个ViewController，分别是RedViewController(主view)，YellowViewController，BlueViewController

主view下面是一个toolbar控件，其他两个view下面是在属性ButtonBar选择ToolBar实现

5.在主view中编码实现

ViewController.h:

#import <UIKit/UIKit.h> #import "BlueViewController.h" #import "YellowViewController.h" @interface DXWViewController : UIViewController @property(retain,nonatomic) BlueViewController *blueViewController; @property(retain,nonatomic)YellowViewController *yellowViewController; - (IBAction)blueClick:(id)sender; - (IBAction)yellowClick:(id)sender; - (IBAction)redClick:(id)sender; - (IBAction)click:(id)sender;  @end 

ViewController.m:

#import "DXWViewController.h"  @interface DXWViewController ()  @end  @implementation DXWViewController  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];     if (self) {         // Custom initialization     }     return self; }  - (void)viewDidLoad {     [super viewDidLoad];      } //如果内存警告，则调用这个方法，可以让你自己清掉一些不需要用的内存 - (void)didReceiveMemoryWarning {     [super didReceiveMemoryWarning];     NSLog(@"内存告急");     //如果内存警告则释放无用资源     if (self.blueViewController.view.superview != nil) {         [self.yellowViewController.view removeFromSuperview];     }     else if(self.yellowViewController.view.superview != nil){         [self.blueViewController.view removeFromSuperview];     } } - (IBAction)click:(id)sender {    // NSLog(@"hello");     [UIView beginAnimations:@"anim" context:nil];     //一个动画的持续时间     [UIView setAnimationDuration:1.5f];     //一个动画的运动随时间快慢曲线     [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];     //动画方式     [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:YES];     //如果当前view的父view存在     if (self.blueViewController.view.superview != nil) {         //如果没创建则创建         if (self.yellowViewController == nil) {             self.yellowViewController = [[[YellowViewController alloc] initWithNibName:@"YellowViewController" bundle:nil] autorelease];         }         [self.blueViewController.view removeFromSuperview];         [self.view insertSubview:self.yellowViewController.view atIndex:10];     }          else if (self.yellowViewController.view.superview != nil) {         [UIView beginAnimations:@"anim" context:nil];         //一个动画的持续时间         [UIView setAnimationDuration:2.5f];         //一个动画的运动随时间快慢曲线         [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];         //动画方式         [UIView setAnimationTransition:UIViewAnimationOptionTransitionCurlUp forView:self.view cache:YES];         //如果没创建则创建         if (self.blueViewController == nil) {             self.blueViewController = [[[BlueViewController alloc] initWithNibName:@"BlueViewController" bundle:nil] autorelease];         }         [self.yellowViewController.view removeFromSuperview];         [self.view insertSubview:self.blueViewController.view atIndex:10];         [UIView commitAnimations];     }     //动画效果启动     [UIView commitAnimations]; } - (IBAction)blueClick:(id)sender {     NSLog(@"blue");     //[self.blueViewController.view removeFromSuperview];     self.blueViewController = [[[BlueViewController alloc] initWithNibName:@"BlueViewController" bundle:nil] autorelease];     [self.view insertSubview:self.blueViewController.view atIndex:10]; }  - (IBAction)yellowClick:(id)sender {     NSLog(@"yellow");    //加上这句就可以红黄蓝任意点击    //[self.yellowViewController.view removeFromSuperview];     self.yellowViewController = [[[BlueViewController alloc] initWithNibName:@"YellowViewController" bundle:nil] autorelease];     [self.view insertSubview:self.yellowViewController.view atIndex:10]; } //主视图控制器 - (IBAction)redClick:(id)sender {     NSLog(@"red");     [self.yellowViewController.view removeFromSuperview];     [self.blueViewController.view removeFromSuperview]; }  @end

旋转效果