1、初始化流程图

image.png

2、生命周期函数

  • init
  • initWithNibName: boundle:
  • loadView
  • viewDidLoad
  • viewWillAppear
  • viewWillLayoutSubviews
  • viewDidLayoutSubviews
  • viewDidAppear
  • viewWillDisappear
  • viewDidDisappear
  • didReceiveMemoryWarning
  • viewWillUnload
  • viewDidUnload