可可 – NSStatusItem自定义视图NSDraggingDestination仅在点击项目后才能工作

概述我有一个NSStatusItem与自定义视图实现NSDraggingDestination协议.但是,只有当状态项目被点击/激活至少一次时,拖放才有效.我想要自定义视图接受滴不管. 一个gif来展示这个问题： 代码从上面的例子(或Xcode Project)： import Cocoaclass AppDelegate: NSObject, NSApplicationDelegate { 我有一个NsstatusItem与自定义视图实现NSDraggingDestination协议.但是,只有当状态项目被点击/激活至少一次时,拖放才有效.我想要自定义视图接受滴不管.

一个gif来展示这个问题：

代码从上面的例子(或Xcode Project)：

import Cocoaclass AppDelegate: NSObject,NSApplicationDelegate {    func applicationDIDFinishLaunching(aNotification: NSNotification?) {        let vc = StatusItemVIEwController()    }    func applicationWillTerminate(aNotification: NSNotification?) {        // Insert code here to tear down your application    }}class StatusItemVIEw: NSVIEw,NSDraggingDestination {    public var image = NSImage(named: "NSQuickLookTemplate")    public var action: Selector?    public var target: AnyObject?    private var statusItem: NsstatusItem    init(statusItem: NsstatusItem) {        let itemWIDth = statusItem.length        let itemHeight = Nsstatusbar.systemStatusbar().thickness        self.statusItem = statusItem        super.init(frame: NSRect(x: 0.0,y: 0.0,wIDth: itemWIDth,height: itemHeight))        var types = [NSURLPboardType,NsstringPboardType] as [String]        for type in NSImage.imagePasteboardTypes() {            types.append(type as String)        }        self.registerForDraggedTypes(types)        statusItem.vIEw = self    }    overrIDe func drawRect(dirtyRect: NSRect) {        let iconSize = image.size        let bounds = self.bounds        let iconX = round((bounds.wIDth - iconSize.wIDth)/2)        let iconY = round((bounds.height - iconSize.height)/2)        image.drawAtPoint(NSPoint(x: iconX,y: iconY),fromrect: NSRect(),operation: NSCompositingOperation.CompositeOverlay,fraction: 1.0)    }    overrIDe func mouseDown(theEvent: NSEvent!) {        if let _action = self.action {            NSApp.sendAction(_action,to: self.target,from: self)        }    }    overrIDe func performDragOperation(sender: NSDraggingInfo!) -> Bool {        println("Performed")        return true    }    overrIDe func draggingEntered(sender: NSDraggingInfo!) -> NSDragOperation {        return NSDragOperation.copy    }    overrIDe func draggingUpdated(sender: NSDraggingInfo!) -> NSDragOperation {        println("Dragging")        return NSDragOperation.copy    }    overrIDe func draggingExited(sender: NSDraggingInfo!) {        println("Exit")    }}class StatusItemVIEwController: NSObject {    private var statusbarItem: NsstatusItem?    private var statusItemVIEw: StatusItemVIEw!    init() {        self.statusbarItem = Nsstatusbar.systemStatusbar().statusItemWithLength(24)        super.init()        if let item = statusbarItem {            statusItemVIEw = StatusItemVIEw(statusItem: item)            statusItemVIEw.target = self            statusItemVIEw.action = "doAction:"        } else {            println("Unable to create status item,terminating self")            NSApplication.sharedApplication().terminate(nil)        }    }    deinit {        Nsstatusbar.systemStatusbar().removeStatusItem(statusbarItem)        statusbarItem = nil        statusItemVIEw = nil    }    func doAction(sender: AnyObject!) {        println("Here is where one would perform the action")    }}

也许这是一个错误,也许我只是错过了一些东西.为什么会发生这种情况,有什么可以做的,以防止这种行为？

看起来像是一个BUG.我刚刚使用XCode 6.1.1和OS X 10.10.2测试了您的项目,并且药物工作很好. 总结

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