禁用呈现的视图控制器的交互式解除-移动开发问题

Disable the interactive dismissal of presented view controller(禁用呈现的视图控制器的交互式解除)

本文介绍了禁用呈现的视图控制器的交互式解除的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

iOS 13 为模态引入了新的 modalPresentationStyle .pageSheet(及其兄弟 .formSheet)设计呈现视图控制器……

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

...我们可以通过向下滑动呈现的视图控制器来关闭这些工作表(交互式关闭).尽管新的pull-to-dismiss"功能非常有用，但它可能并不总是可取的.

…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?- 请记住，我们保持演示风格相同.

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

选项一:

viewController.isModalInPresentation = true

(禁用交互式 .pageSheet 解雇行为是这样的.)

(Disabled interactive .pageSheet dismissal acts like this.)

从 iOS 13 开始，UIViewController 包含一个名为 isModalInPresentation 的新属性，必须将其设置为 true 以防止交互式关闭.
它基本上会忽略视图控制器范围之外的事件.请记住，如果您不仅使用自动样式，还使用 .popover 等表示样式.
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.

来自官方文档:如果 true，UIKit 会忽略视图控制器范围之外的事件，并防止视图控制器在屏幕上的交互解除.

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
}

从 iOS 13 开始，UIAdaptivePresentationControllerDelegate 包含一个名为 presentationControllerShouldDismiss 的新方法.
仅当呈现的视图控制器未以编程方式关闭且其 isModalInPresentation 属性设置为 false 时才会调用此方法.

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.