Multiple Modally Presented (page sheet) ViewControllers Navigation Item Bug

问题

iOS 13. The problem is shown on the screenshot.

The steps are:

1. Open one view controller modally with page sheet style.

2. Open another (second) view controller modally with page sheet style.

Expected: no Nav Bar bug

Actual: see screenshot

The source code is available here: https://github.com/rinat-enikeev/NavBarBug

Question: how to fix this bug? I want to present 2 view controllers modally with page sheet style.

回答1:

Ok, for those who faced the same issue. The workaround is to add the following code to the viewDidLoad method:

if #available(iOS 13, *) {
    let appearance = navigationController?.navigationBar.standardAppearance.copy()
    navigationItem.standardAppearance = appearance
}

来源：https://stackoverflow.com/questions/58266232/multiple-modally-presented-page-sheet-viewcontrollers-navigation-item-bug