将UIViewController从一个presentingViewController移到另一个没有动画的

Question

我正在尝试将一个视图控制器不带动画地移动到另一个：

viewController.dismiss(animated: false, completion: nil)
// viewController.presentingViewController != nil here
tabBarController.present(viewController, animated: false, completion: nil)

运行此代码时，我崩溃了：Application tried to present modally an active controller

Answer 1

您可以将当前零件放入dismiss调用的完成处理程序中

viewController.dismiss(animated: false) {
    tabBarController.present(viewController, animated: false, completion: nil)
}