生命周期总结

App生命周期

• 启动App时:

  application:willFinishLaunchingWithOptions:
  
  application:didFinishLaunchingWithOptions:
  
  applicationDidBecomeActive:
  

• App进入后台时: 

  applicationWillResignActive:
  
  applicationDidEnterBackground:
  

• App从后台回到前台时:

  applicationWillEnterForeground:
  
  applicationDidBecomeActive:
  

• 退出App时:

  applicationWillTerminate: 

ViewController生命周期

init

loadView

viewDidLoad

viewWillAppear:

viewDidAppear:

viewWillDisappear:

viewDidDisappear:

dealloc