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AppDelegate 、UIApplication 的用法

2024-10-23 04:12:01   208人阅读

转载自  http://blog.chinaunix.net/uid-26768267-id-3300042.html

  1. //AppDelegate.h 头文件
  3. #import <UIKit/UIKit.h>
  6. @class SwitchViewController;
  8. @interface AppDelegate : UIResponder <UIApplicationDelegate>
  9. {
  10.     UIApplication *mApp; //新建一个UIApplication对象
  11. }
  13. @property (strong, nonatomic) UIWindow *window;
  16. @property (nonatomic, retain) SwitchViewController *switchViewController; //为窗口转换的类
  19. @end
  20.  
  22. #import "AppDelegate.h"
  24. #import "SwitchViewController.h"
  26. @implementation AppDelegate
  28. @synthesize window = _window;
  29. @synthesize switchViewController;
  31. - (void)dealloc
  32. {
  33.     [_window release];
  34.     [switchViewController release];
  35.     mApp.idleTimerDisabled = NO;
  36.     [super dealloc];
  37. }
  39. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  40. {
  41.     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
  42.     //初始化
  43.     switchViewController = [[SwitchViewController alloc]init];
  44.     
  45.     //这两句话效果一样
  46.     //[[self window]setRootViewController:switchViewController];
  47.     self.window.rootViewController = self.switchViewController;
  48.     
  49.     [switchViewController release];
  50.     mApp = application;
  51.     application.idleTimerDisabled = YES;
  52.     [[self window]makeKeyAndVisible]; //或[self.window makeKeyAndVisible];
  53.     
  54.     return YES;
  55.    
  56. }
  57. @end
  61.  
  63. //SwitchViewController 类头文件。集中实现窗口跳转
  65. #import <UIKit/UIKit.h>
  66. #import "ViewTestone.h"
  67. #import "ViewController.h"
  68. @class ViewTestone; //View
  69. @class ViewController; //View
  72. typedef int RequestId;
  74. enum REQUESTVIEW
  75. {
  76.     REQUEST_TESTONEVIEW,
  77. };
  79. @interface SwitchViewController :UIViewController
  80. {
  81.     
  82. }
  83. @property (nonatomic, retain)ViewTestone *viewTestone;
  84. @property (nonatomic, retain) UIViewController *previousViewController;
  85. @property (nonatomic, retain)ViewController *viewController;
  87. -(void)switchToView:(RequestId)requestId;
  89. -(void)gotoTestoneView; //跳转到TestoneView
  91. @end
  92.  
  94. //SwitchViewController.m 文件
  95. #import "SwitchViewController.h"
  97. @implementation SwitchViewController
  98. {
  99.     
  100. }
  101. @synthesize viewTestone;
  102. @synthesize previousViewController;
  103. @synthesize viewController;
  105. //当程序加载完AppDelegate里的 didFinishLaunchingWithOptions 方法后就会跳到这里 .下面可把ViewController实现为默认的View加载
  106. -(void)viewDidLoad
  107. {
  108.     NSLog(@"----------");
  109.     if(self.viewController ==nil)
  110.     {
  111.         //新建VIEWCONTRollerr 的一个对象
  112.         ViewController *viewcontroll = [[ViewController alloc]initWithNibName:@"ViewConTroller" bundle:nil];
  113.         self.viewController = viewcontroll;
  114.         [viewcontroll release];
  115.     }
  116.     [self.view insertSubview:viewController.view atIndex:0];
  117.     self.previousViewController = self.viewController;
  118. }
  120. -(void)viewDidUnload
  121. {
  122.     self.viewController = nil;
  123.     self.viewTestone = nil;
  124.     [super viewDidLoad];
  125. }
  127. -(void)dealloc
  128. {
  129.     [viewTestone release];
  130.     [viewController release];
  131.     [super dealloc];
  132. }
  134. //下面具体实现view之间的跳转。一般的程序都会有很多个这样的窗口跳转。所以把它们集中在一个公共的类里面这样会拿的代码看上去很简洁。明了，
  135. -(void)switchToView:(RequestId)requestId
  136. {
  137.     switch (requestId) {
  138.         case REQUEST_TESTONEVIEW:
  139.             [self gotoTestoneView];
  140.             break;
  141.          //....................
  142.         default:
  143.             break;
  144.     }
  145. }
  147. //这就到了具体到某一个窗口之间的跳转了。
  148. -(void)gotoTestoneView
  149. {
  150.     NSLog(@"test ok~");
  151.     if(self.viewTestone ==nil)
  152.     {
  153.         ViewTestone *testOneView = [[ViewTestone alloc]initWithNibName:@"ViewTestone" bundle:nil];
  154.         self.viewTestone = testOneView;
  155.         [testOneView release];
  156.     }
  157.     if(self.previousViewController.view.superview !=nil)
  158.     {
  159.         [previousViewController.view removeFromSuperview];
  160.     }
  161.     [self.view insertSubview:viewTestone.view atIndex:0];
  162.     self.previousViewController = [self viewTestone];
  163. }
  165. @end
  166.  
  168.  
  170. //具体的实现方法。。应用～
  172. -(void)addButtonToNewView
  173. {
  174.     //新建一个按键
  175.     UIButton *toviewBtn = [UIButton buttonWithType:UIButtonTypeCustom];
  176.     //设置按钮的背景颜色 UIControlStateNormal按钮按之前的颜色 UIControlStateHighlighted反之
  177.     [toviewBtn setImage:[UIImage imageNamed:@"v_exit.png"]forState:UIControlStateNormal ] ;
  178.     //CGRect r;
  179.     //r = CGRectMake(120, 300, 100, 30);
  180.     //设置按钮的大小
  181.     toviewBtn.frame = CGRectMake(120, 300, 100, 30);;
  182.     //为按钮添加事件
  183.     [toviewBtn addTarget:self action:@selector(toOntViewPress:) forControlEvents:UIControlEventTouchUpInside];
  184.     //加载到当前的view
  185.     [self.view addSubview:toviewBtn];
  186. }
  188. -(void)toOntViewPress:(id)sender
  189. {
  190.     NSLog(@"successfull");
  191.     //前面长长的AppDelegate SwitchViewController 都是为了下面这两句话。两句话就可以轻松的跳转到你想要去的页面。这样就显得很方便。
  192.     AppDelegate *app = [[UIApplication sharedApplication]delegate];
  193.     [app.switchViewController switchToView:0];
  194. }

AppDelegate 、UIApplication 的用法


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