在原生iOS文件应用程序中创建ContextMenu动画可以通过以下步骤实现:
contextMenuInteraction(_:configurationForMenuAtLocation:)
:返回一个UIContextMenuConfiguration对象,用于配置ContextMenu的内容和行为。contextMenuInteraction(_:previewForHighlightingMenuWithConfiguration:)
:返回一个UIViewController对象,用于在ContextMenu显示之前预览内容。contextMenuInteraction(_:previewForDismissingMenuWithConfiguration:)
:返回一个UIViewController对象,用于在ContextMenu消失之前预览内容。contextMenuInteraction(_:willPerformPreviewActionForMenuWith:animator:)
:在用户选择ContextMenu中的某个操作时执行的操作。contextMenuInteraction(_:willDisplayMenuForConfiguration:animator:)
:在ContextMenu显示之前执行的操作。contextMenuInteraction(_:willEndForConfiguration:animator:)
:在ContextMenu消失之前执行的操作。以下是一个示例代码,演示如何在原生iOS文件应用程序中创建ContextMenu动画:
import UIKit
class ViewController: UIViewController, UIContextMenuInteractionDelegate {
override func viewDidLoad() {
super.viewDidLoad()
// 创建一个视图
let view = UIView(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
view.backgroundColor = .red
self.view.addSubview(view)
// 创建ContextMenu交互对象
let interaction = UIContextMenuInteraction(delegate: self)
// 将交互对象添加到视图上
view.addInteraction(interaction)
}
// 实现UIContextMenuInteractionDelegate的代理方法
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
return UIContextMenuConfiguration(identifier: nil, previewProvider: nil) { _ in
// 创建ContextMenu的菜单项
let action1 = UIAction(title: "Action 1", image: UIImage(systemName: "folder")) { _ in
// 执行操作
}
let action2 = UIAction(title: "Action 2", image: UIImage(systemName: "trash")) { _ in
// 执行操作
}
// 创建ContextMenu的子菜单
let subMenu = UIMenu(title: "Sub Menu", children: [action1, action2])
// 创建ContextMenu的菜单
return UIMenu(title: "Menu", children: [subMenu])
}
}
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, previewForHighlightingMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
// 创建预览视图
let previewViewController = UIViewController()
previewViewController.view.backgroundColor = .blue
return UITargetedPreview(view: previewViewController.view)
}
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, previewForDismissingMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
// 创建预览视图
let previewViewController = UIViewController()
previewViewController.view.backgroundColor = .blue
return UITargetedPreview(view: previewViewController.view)
}
// 其他代理方法的实现...
}
以上代码演示了如何在原生iOS文件应用程序中创建ContextMenu动画。在代理方法中,可以根据需求配置ContextMenu的内容和行为,并使用UIViewPropertyAnimator类来创建动画效果。
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