swift - 在appkit中禁用右键单击

Question

我目前正在我的 mouseDrag 函数中接收 nextEvent

    while true {
        guard let nextEvent = self.window?.nextEvent(matching: [.leftMouseDragged, .leftMouseUp, .rightMouseUp]) else {
            continue
        }
        switch nextEvent.type {
        case .leftMouseDragged:
            self.cursorUpdate(with: nextEvent)
            self.mouseDragged(with: nextEvent)

        case .rightMouseUp:
            continue

        default:
            self.mouseUp(with: nextEvent)
            return
        }
    }

我只是想在此期间禁用右键单击。但是，使用此实现，右键单击只需排队并在循环完成后被调用。

我将如何禁用正在注册的右键单击？

Answer 1

尝试将.rightMouseDown和添加.rightMouseDragged到您的匹配掩码中。它是.rightMouseDown使 AppKit 显示上下文菜单的事件。

    guard let nextEvent = self.window?.nextEvent(matching: [.leftMouseDragged, .leftMouseUp, .rightMouseDown, .rightMouseDragged, .rightMouseUp]) else {
        continue
    }

您也可以考虑切换到NSWindow.trackEvents(matching:timeout:mode:handler:)而不是编写自己的循环：

    window.trackEvents(matching: [.leftMouseDragged, .leftMouseUp, .rightMouseDown, .rightMouseDragged, .rightMouseUp], timeout: NSEvent.foreverDuration, mode: .eventTrackingRunLoopMode) { (event, outStop) in
        guard let event = event else { return }
        switch event.type {
        case .rightMouseDown, .rightMouseDragged, .rightMouseUp: return
        case .leftMouseDragged:
            self.cursorUpdate(with: event)
            self.mouseDragged(with: event)
        case .leftMouseUp:
            self.mouseUp(with: event)
            outStop.pointee = true
        default:
            break
        }
    }

UsingtrackEvents让 AppKit 运行主运行循环，因此计时器和观察者可以继续触发（如果它们被安排为.eventTrackingRunLoopMode）。