iOS开发 ☞ UIApplication 生命周期
2016-05-05 18:01
281 查看
test enviroment A Simulator , A lots of codes like this - (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"%@",NSStringFromSelector(_cmd)); return YES; } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"%@",NSStringFromSelector(_cmd)); return YES; } - (void)applicationWillResignActive:(UIApplication *)application { // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. NSLog(@"%@",NSStringFromSelector(_cmd)); } - (void)applicationDidEnterBackground:(UIApplication *)application { // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. NSLog(@"%@",NSStringFromSelector(_cmd)); } - (void)applicationWillEnterForeground:(UIApplication *)application { // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. NSLog(@"%@",NSStringFromSelector(_cmd)); } - (void)applicationDidBecomeActive:(UIApplication *)application { // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. NSLog(@"%@",NSStringFromSelector(_cmd)); } - (void)applicationWillTerminate:(UIApplication *)application { // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. NSLog(@"%@",NSStringFromSelector(_cmd)); NSUserDefaults *d = [NSUserDefaults standardUserDefaults]; [d setObject:@"1" forKey:@"3"]; [d synchronize]; }
启动:
application:willFinishLaunchingWithOptions: application:didFinishLaunchingWithOptions: applicationDidBecomeActive:
点击Home键:
applicationWillResignActive: applicationDidEnterBackground:
从后台恢复:
applicationWillEnterForeground: applicationDidBecomeActive:
应用在前台,手动杀死程序
applicationWillResignActive: applicationDidEnterBackground:
applicationWillTerminate:
应用在后台,手动杀死
Do Nothing,the plist file not exits
我们经常滑动屏幕,查看通知,like this:
applicationWillResignActive:
如果你点击了某个通知,跳转到了别的应用,当然要执行
applicationDidEnterBackground:
总结一下:
在一个应用程序的整个生命周期,只会调用一次的方法有
application:willFinishLaunchingWithOptions: application:didFinishLaunchingWithOptions: applicationWillTerminate:
其余的则可能被调用多次,要依据情况而定。
相关文章推荐
- android studio中安装parcelable插件
- 启动外部程序及安装app的相关代码
- Android Studio导入Vitamio问题详细解析
- android 缓存思路
- cocos2dx 3.3 cocos studio控件与C++代码内类的对应关系
- Scrapy框架结合Spynner采集需进行js,ajax动态加载的网页并提取网页信息(以采集微信公众号文章列表为例)
- iOS开发-由浅至深学习block
- AppDelegate中几个常用的回调调用时机
- 有关iOS学习方法拙见
- iOS run loop(NSRunLoop)和线程的一些需要注意的细节
- 学习Android动画小结
- Android 编写文件浏览器
- iOS 图片捏合放大缩小 点击放大缩小
- Android Handler
- IOS 数组去重的几种方式
- Xcode插件管理工具Alcatraz
- 怎样将Activity设置成窗口模式
- android开发通知常用设置方法
- Parcelable的使用,以及与Serializable的区别(最后有实例)
- 已经上架的app(可供销售)在AppStore上搜不到的解决办法