iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
摘要：
iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途init－初始化程序viewDidLoad－加载视图viewWillAppear－UIViewController对象的视图即将加入窗口时调用；viewDidApper－UIViewController对象的视图已经加入到窗口时调用；viewWillDisappear－UIViewController对象的视图即将消失、被覆盖或是隐藏时调用；viewDidDisappear－UIViewContr 阅读全文