将 acceptMouseMovedEvents 用于带有故事板的 SpriteKit 鼠标操作和 Swift

Question

我在 Xcode 中使用故事板引用自定义 NSView 创建了一个 SpriteKit 场景。但是，我无法使用 SpriteKit 实现任何 mouseMoved 事件，因为我不知道如何引用程序的 NSWindow 来将其 acceptsMouseMovedEvents 属性设置为 "true"。

如何在我的 AppDelegate.swift 文件中创建对我的 NSWindow 的 @IBOutlet 引用，以便我可以更改此属性？

Answer 1

您可以配置一个 NSTrackingArea 对象来跟踪鼠标的移动以及光标何时进入或退出视图。要创建 NSTrackingArea 对象，您需要指定要跟踪鼠标事件的视图区域、将接收鼠标事件消息的所有者以及跟踪发生的时间（例如，在键 window).以下是如何将跟踪区域添加到视图的示例。添加到您的 SKScene 子类，例如 GameScene.swift.

Swift 3 和 4

override func didMove(to view: SKView) {
    // Create a tracking area object with self as the owner (i.e., the recipient of mouse-tracking messages
    let trackingArea = NSTrackingArea(rect: view.frame, options: [.activeInKeyWindow, .mouseMoved], owner: self, userInfo: nil)
    // Add the tracking area to the view
    view.addTrackingArea(trackingArea)
}

// This method will be called when the mouse moves in the view
override func mouseMoved(with theEvent: NSEvent) {
    let location = theEvent.location(in: self)
    print(location)
}

Swift 2

override func didMoveToView(view: SKView) {
    // Create a tracking area object with self as the owner (i.e., the recipient of mouse-tracking messages
    let trackingArea = NSTrackingArea(rect: view.frame, options: NSTrackingAreaOptions.ActiveInKeyWindow | NSTrackingAreaOptions.MouseMoved, owner: self, userInfo: nil)
    // Add the tracking area to the view
    view.addTrackingArea(trackingArea)
}

// This method will be called when the mouse moves in the view
override func mouseMoved(theEvent: NSEvent) {
    let location = theEvent.locationInNode(self)
    println(location)
}

Answer 2

0x141E 的回答更新：

override func didChangeSize(_ oldSize: CGSize) {
    guard let newRect = view?.bounds else {return}

    let options = NSTrackingArea.Options(rawValue: NSTrackingArea.Options.activeInKeyWindow.rawValue | NSTrackingArea.Options.mouseMoved.rawValue)
    let userInfo = ["SKMouseInput": 1]
    let trackingArea = NSTrackingArea(rect: newRect, options: options, owner: self, userInfo: userInfo)
    if let previousTrackingAreas = view?.trackingAreas {
        for area in previousTrackingAreas {
            if let theInfo = area.userInfo {
                if let _ = theInfo["SKMouseInput"]  {
                    view?.removeTrackingArea(area)
                }
            }
        }
    }
    view?.addTrackingArea(trackingArea)
}

此 SKScene 方法覆盖将在初始化后不久调用，将允许不受 window 大小更改的影响，并将清理旧的跟踪区域。请注意，它仍然需要覆盖 mouseMoved。

将 acceptMouseMovedEvents 用于带有故事板的 SpriteKit 鼠标操作和 Swift

Using acceptsMouseMovedEvents for SpriteKit mouse actions with Storyboards and Swift

cocoa

iboutlet

xcode-storyboard

sprite-kit

swift