IOS开发 applicationDidBecomeActive 应用程序挂起、复原与终止

一、挂起

当有电话进来或者锁屏,这时你的应用程会挂起,在这时,UIApplicationDelegate委托会收到通知,调用 applicationWillResignActive 方法,你可以重写这个方法,做挂起前的工作,比如关闭网络,保存数据。

C代码  收藏代码

- (void)applicationWillResignActive:(UIApplication*)application{

}

当你的程序被挂起后他不会在后台运行。

二、复原

当程序复原时,另一个名为 applicationDidBecomeActive 委托方法会被调用,在此你可以通过之前挂起前保存的数据来恢复你的应用程序:

C代码  收藏代码

- (void)applicationDidBecomeActive:(UIApplication*)application{

}

注意:应用程序在启动时,在调用了 applicationDidFinishLaunching 方法之后也会调用 applicationDidBecomeActive 方法,所以你要确保你的代码能够分清复原与启动,避免出现逻辑上的bug。

三、终止

当用户按下按钮,或者关机,程序都会被终止。当一个程序将要正常终止时会调用 applicationWillTerminate 方法。但是如果长主按钮强制退出,则不会调用该方法。这个方法该执行剩下的清理工作,比如所有的连接都能正常关闭,并在程序退出前执行任何其他的必要的工作:

C代码  收藏代码

- (void)applicationWillTerminate:(UIApplication*)application{

}

来源: http://blog.csdn.NET/iukey/article/details/7311115

Java代码  程序开始 !"); return YES; } - (void)applicationWillResignActive:(UIApplication *)application { NSLog(@"\n ===> 程序暂行 !"); } - (void)applicationDidEnterBackground:(UIApplication *)application { NSLog(@"\n ===> 程序进入后台 !"); } - (void)applicationWillEnterForeground:(UIApplication *)application { NSLog(@"\n ===> 程序进入前台 !"); } - (void)applicationDidBecomeActive:(UIApplication *)application { NSLog(@"\n ===> 程序重新激活 !"); } - (void)applicationWillTerminate:(UIApplication *)application { NSLog(@"\n ===> 程序意外暂行 !"); UIDevice *device = [UIDevice currentDevice]; }" quality="high" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"> 收藏代码

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

{

// Override point for customization after application launch.

NSLog(@"\n ===> 程序开始 !");

return YES;

}

- (void)applicationWillResignActive:(UIApplication *)application

{

NSLog(@"\n ===> 程序暂行 !");

}

- (void)applicationDidEnterBackground:(UIApplication *)application

{

NSLog(@"\n ===> 程序进入后台 !");

}

- (void)applicationWillEnterForeground:(UIApplication *)application

{

NSLog(@"\n ===> 程序进入前台 !");

}

- (void)applicationDidBecomeActive:(UIApplication *)application

{

NSLog(@"\n ===> 程序重新激活 !");

}

- (void)applicationWillTerminate:(UIApplication *)application

{

NSLog(@"\n ===> 程序意外暂行 !");

UIDevice *device = [UIDevice currentDevice];

}

首次运行:

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

- (void)applicationDidBecomeActive:(UIApplication *)application

首次关闭(home):

- (void)applicationWillResignActive:(UIApplication *)application

- (void)applicationDidEnterBackground:(UIApplication *)application

再次运行:

- (void)applicationWillEnterForeground:(UIApplication *)application

- (void)applicationDidBecomeActive:(UIApplication *)application

再次关闭:

- (void)applicationWillResignActive:(UIApplication *)application

- (void)applicationDidEnterBackground:(UIApplication *)application

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