iOS页面加载生命周期

SecondViewController push ThirdViewController

SecondViewController push  ThirdViewController的方法顺序
ThirdViewController---[ThirdViewController init]
ThirdViewController---[ThirdViewController loadView]
ThirdViewController---[ThirdViewController viewDidLoad]
SecondViewController---[SecondViewController viewWillDisappear:]
ThirdViewController---[ThirdViewController viewWillAppear:]
SecondViewController---[SecondViewController viewDidDisappear:]
ThirdViewController---[ThirdViewController viewDidAppear:]

ThirdViewController pop SecondViewController

ThirdViewController pop SecondViewController的方法顺序
ThirdViewController---[ThirdViewController viewWillDisappear:]
SecondViewController---[SecondViewController viewWillAppear:]
ThirdViewController---[ThirdViewController viewDidDisappear:]
SecondViewController---[SecondViewController viewDidAppear:]
ThirdViewController---[ThirdViewController dealloc]

ThirdViewController presentViewController FourthViewController

ThirdViewController---[ThirdViewController viewWillDisappear:]
FourthViewController---[FourthViewController viewWillAppear:]
FourthViewController---[FourthViewController viewDidAppear:]
ThirdViewController---[ThirdViewController viewDidDisappear:]

FourthViewController dismissViewControllerAnimated ThirdViewController

FourthViewController---[FourthViewController viewWillDisappear:]
ThirdViewController---[ThirdViewController viewWillAppear:]
ThirdViewController---[ThirdViewController viewDidAppear:]
FourthViewController---[FourthViewController viewDidDisappear:]
FourthViewController---[FourthViewController dealloc]

相关方法

1、 alloc            创建对象，分配空间
2、 init             初始化对象，初始化数据
3、loadView          加载视图
4、viewDidLoad       载入完成
5、viewWillAppear    视图将出现在屏幕
6、viewDidAppear     视图已在屏幕上渲染完成
1、viewWillDisappear 视图将被从屏幕上移除之
2、viewDidDisappear  视图已经被从屏幕上移除
3、dealloc           视图被销毁