当有present的动作之后，push会有几率导致宕机，卡住，进入后台再回到前台，push中会有黑屏

[realWayneZhang]

当有present的动作之后，push会有几率导致宕机，卡住，进入后台再回到前台，push中会有黑屏

iOS 12，iOS 13
导航栏设置：
interactivePopGestureRecognizer?.delegate = nil
navigationBar.barTintColor = UIColor.bg
navigationBar.tintColor = UIColor.f
navigationBar.titleTextAttributes =
[NSAttributedString.Key.font: UIFont.m17 ?? UIFont.systemFont(ofSize: 17, weight: UIFont.Weight.medium),
NSAttributedString.Key.foregroundColor: UIColor.f]
let navigaiotnBar = UINavigationBar.appearance()
let backImg = UIImage(named: "navigationbar_back_withtext_1")
navigaiotnBar.backIndicatorImage = backImg
navigaiotnBar.backIndicatorTransitionMaskImage = backImg

有几率：

1. 当前ViewController的导航栏透明
2. 当前ViewController present 一个ViewController
3. dismiss之后回到透明导航栏的ViewController
4. 再push，会卡住（好像在进行复杂的递归计算，导致UI卡住）
5. 让app 进入后台，再返回前台，在当前透明导航栏的ViewController中push会有竖着的黑色区域出现