学习生命周期及钩子函数。
钩子 | 说明 |
---|---|
loadView |
创建 self.view (懒加载) |
viewDidLoad |
view 加载完成,处理 view 相关功能 |
viewWillAppear |
view 即将展现到 APP |
viewDidAppear |
view 已经展现到 APP |
viewWillDisappear |
view 即将移除 |
viewDidDisappear |
view 已经移除 |
在转场动画中,可能顺序是:
正常操作: secondWillDisappear
-> firstWillAppear
-> firstDidAppear
-> secondDidDisappear
转场取消: secondWillDisappear
-> firstWillAppear
-> firstWillDisappear
-> firstDidDisappear
-> secondWillApear
-> secondWillAppear