IOS编程：iOS开辟――性命周期仓酷云

很简单OBJCAVFoundation---播放视频相关的库最近正在学习这些算是学iOS开发的一些方法为了处置好使用程序的挂起、停息等情形下的数据保留，或对应增加所需处置，我们必需懂得ios性命周期。
可是不要往背往记，做个实行就好。
[cpp]

• -(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions
  
• {
  
• //Overridepointforcustomizationafterapplicationlaunch.
  
• NSLog(@"程序入手下手");
  
• returnYES;
  
• }
  
• 
  
• -(void)applicationWillResignActive:(UIApplication*)application
  
• {
  
• //Sentwhentheapplicationisabouttomovefromactivetoinactivestate.Thiscanoccurforcertaintypesoftemporaryinterruptions(suchasanincomingphonecallorSMSmessage)orwhentheuserquitstheapplicationanditbeginsthetransitiontothebackgroundstate.
  
• //Usethismethodtopauseongoingtasks,disabletimers,andthrottledownOpenGLESframerates.Gamesshouldusethismethodtopausethegame.
  
• NSLog(@"程序停息");
  
• }
  
• 
  
• -(void)applicationDidEnterBackground:(UIApplication*)application
  
• {
  
• //Usethismethodtoreleasesharedresources,saveuserdata,invalidatetimers,andstoreenoughapplicationstateinformationtorestoreyourapplicationtoitscurrentstateincaseitisterminatedlater.
  
• //Ifyourapplicationsupportsbackgroundexecution,thismethodiscalledinsteadofapplicationWillTerminate:whentheuserquits.
  
• NSLog(@"程序进进背景");
  
• }
  
• 
  
• -(void)applicationWillEnterForeground:(UIApplication*)application
  
• {
  
• //Calledaspartofthetransitionfromthebackgroundtotheinactivestate;hereyoucanundomanyofthechangesmadeonenteringthebackground.
  
• NSLog(@"程序进进前台");
  
• }
  
• 
  
• -(void)applicationDidBecomeActive:(UIApplication*)application
  
• {
  
• //Restartanytasksthatwerepaused(ornotyetstarted)whiletheapplicationwasinactive.Iftheapplicationwaspreviouslyinthebackground,optionallyrefreshtheuserinterface.
  
• NSLog(@"程序再次激活");
  
• }
  
• 
  
• -(void)applicationWillTerminate:(UIApplication*)application
  
• {
  
• //Calledwhentheapplicationisabouttoterminate.Savedataifappropriate.SeealsoapplicationDidEnterBackground:.
  
• NSLog(@"程序不测停止");
  
• }
  

-(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions{//Overridepointforcustomizationafterapplicationlaunch.NSLog(@"程序入手下手");returnYES;}-(void)applicationWillResignActive:(UIApplication*)application{//Sentwhentheapplicationisabouttomovefromactivetoinactivestate.Thiscanoccurforcertaintypesoftemporaryinterruptions(suchasanincomingphonecallorSMSmessage)orwhentheuserquitstheapplicationanditbeginsthetransitiontothebackgroundstate.//Usethismethodtopauseongoingtasks,disabletimers,andthrottledownOpenGLESframerates.Gamesshouldusethismethodtopausethegame.NSLog(@"程序停息");}-(void)applicationDidEnterBackground:(UIApplication*)application{//Usethismethodtoreleasesharedresources,saveuserdata,invalidatetimers,andstoreenoughapplicationstateinformationtorestoreyourapplicationtoitscurrentstateincaseitisterminatedlater.//Ifyourapplicationsupportsbackgroundexecution,thismethodiscalledinsteadofapplicationWillTerminate:whentheuserquits.NSLog(@"程序进进背景");}-(void)applicationWillEnterForeground:(UIApplication*)application{//Calledaspartofthetransitionfromthebackgroundtotheinactivestate;hereyoucanundomanyofthechangesmadeonenteringthebackground.NSLog(@"程序进进前台");}-(void)applicationDidBecomeActive:(UIApplication*)application{//Restartanytasksthatwerepaused(ornotyetstarted)whiletheapplicationwasinactive.Iftheapplicationwaspreviouslyinthebackground,optionallyrefreshtheuserinterface.NSLog(@"程序再次激活");}-(void)applicationWillTerminate:(UIApplication*)application{//Calledwhentheapplicationisabouttoterminate.Savedataifappropriate.SeealsoapplicationDidEnterBackground:.NSLog(@"程序不测停止");}
实行了局：
1.初次启动使用程序：
2012-06-2611:06:39.313WQTest[485:17903]程序入手下手
2012-06-2611:06:39.320WQTest[485:17903]程序再次激活
2.摁HOME键加入：
2012-06-2611:08:08.687WQTest[485:17903]程序停息
2012-06-2611:08:08.690WQTest[485:17903]程序进进背景

3.再次进进程序：
2012-06-2611:09:11.047WQTest[485:17903]程序进进前台
2012-06-2611:09:11.049WQTest[485:17903]程序再次激活

管理所有设备发生的事件比如屏幕旋转屏幕关闭或者一些其他的程序的控制逻辑也应该写在这里他的初始化函数是-(id)initWithNibName:(NSString*)nibNamebundle:(NSBundle*)nibBundle后面那个NibName是InterfaceBuilder里设计的界面现在IB已经集成到XCode里了