我想向我的应用程序添加一个 UIMenu,我正在练习它,现在有一个问题是否可以设置 UIMenu 的位置UIMenu
比当前显示的按钮稍高一点:
![Menu above button](https://i.stack.imgur.com/InBGx.png)
正如您在这张照片中看到的,菜单当前覆盖了选项卡栏,我想将其设置为比选项卡栏高一点。
这是我的代码:
let menu = UIMenu(title: "", children: [
UIAction(title: NSLocalizedString("Gallery", comment: ""), image: UIImage(systemName: "folder"), handler: {
(_) in
self.loadPhotoGallery()
})
])
btnMenuExtras.menu = menu
iOS 14+
辛斯 iOS 14UIControl
具有提供附加菜单的点的方法
/// Return a point in this control's coordinate space to which to attach the given configuration's menu.
@available(iOS 14.0, *)
open func menuAttachmentPoint(for configuration: UIContextMenuConfiguration) -> CGPoint
所以你可以覆盖UIButton
为菜单(计算或硬编码)提供相对于按钮本身的所需位置(因为它位于按钮的坐标空间中),并在情节提要中使用该按钮(作为控制类)或以编程方式创建(如果需要注入它在某处):
class MyButton: UIButton {
var offset = CGPoint.zero
override func menuAttachmentPoint(for configuration: UIContextMenuConfiguration) -> CGPoint {
// hardcoded variant
// return CGPoint(x: 0, y: -50)
// or relative to orginal
let original = super.menuAttachmentPoint(for: configuration)
return CGPoint(x: original.x + offset.x, y: original.y + offset.y)
}
}
class ViewController: UIViewController {
@IBOutlet weak var btnMenuExtras: MyButton! // << from storyboard
override func viewDidLoad() {
super.viewDidLoad()
let menu = UIMenu(title: "", children: [
UIAction(title: NSLocalizedString("Gallery", comment: ""), image: UIImage(systemName: "folder"), handler: {
(_) in
// self.loadPhotoGallery()
})
])
// offset is hardcoded for demo simplicity
btnMenuExtras.offset = CGPoint(x: 0, y: -50) // << here !!
btnMenuExtras.menu = menu
}
}
![demo](https://i.stack.imgur.com/tztA3.png)
Result:
![demo1](https://i.stack.imgur.com/Ofvy3.png)
使用 Xcode 13 / iOS 15 准备并测试演示
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