禁用iOS 13中呈现的视图控制器的交互式解雇 [英] Disable the interactive dismissal of presented view controller in iOS 13

问题描述

iOS 13 引入了一种新设计的modalPresentationStyle .pageSheet(及其同级.formSheet)，用于以模态呈现的视图控制器…

iOS 13 introduces a new design of modalPresentationStyle .pageSheet (and its sibling .formSheet) for modally presented view controllers…

...我们可以通过将显示的视图控制器向下滑动(交互式解雇)来解雇这些工作表.尽管新的拉动关闭"功能非常有用，但可能并不总是希望如此.

…and we can dismiss these sheets by sliding the presented view controller down (interactive dismissal). Although the new "pull-to-dismiss" feature is pretty useful, it may not always be desirable.

问题:我们如何关闭交互式解雇功能? -请记住，我们保持演示文稿样式不变.

THE QUESTION: How can we turn the interactive dismissal off? - Bear in mind we keep the presentation style the same.

推荐答案

选项1:

viewController.isModalInPresentation = true

(禁用互动式.pageSheet的解雇行为是这样的.)

(Disabled interactive .pageSheet dismissal acts like this.)

• 自iOS 13起，UIViewController包含一个名为isModalInPresentation的新属性，必须将其设置为true才能防止交互式解雇.
• 它基本上会忽略视图控制器范围之外的事件.如果您不仅使用自动样式，还使用.popover等演示样式
，请记住这一点.
• 此属性默认为false.

• Since the iOS 13, UIViewController contains a new property called isModalInPresentation which must be set to true to prevent the interactive dismissal.
• It basically ignores events outside the view controller's bounds. Bear that in mind if you are using not only the automatic style but also presentation styles like .popover etc.
• This property is false by default.

摘录自官方文档 :如果为true，则UIKit会忽略视图控制器范围之外的事件，并防止在视图控制器出现在屏幕上时对其进行交互式关闭.

From the official docs: If true, UIKit ignores events outside the view controller's bounds and prevents the interactive dismissal of the view controller while it is onscreen.

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选项2:

func presentationControllerShouldDismiss(_ presentationController: UIPresentationController) -> Bool {
    return false
}

• 自iOS 13起，UIAdaptivePresentationControllerDelegate包含一个名为presentationControllerShouldDismiss的新方法.
• 仅当未以编程方式关闭显示的视图控制器并且其isModalInPresentation属性设置为false时，才调用此方法.
• Since the iOS 13, UIAdaptivePresentationControllerDelegate contains a new method called presentationControllerShouldDismiss.
• This method is called only if the presented view controller is not dismissed programmatically and its isModalInPresentation property is set to false.

提示:不要忘记分配presentationController的委托.

Tip: Don't forget to assign presentationController's delegate.

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