我的视图生命周期
viewDidLoad()正常调用,但viewWillAppear(_动画:Bool) 没有被调用,但是它通常出现在ui中
override func viewDidLoad() {
super.viewDidLoad()
// some bussiness
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// some bussiness
}