在NSMenuItem中使用NSProgressIndicator [英] Using NSProgressIndicator inside an NSMenuItem

问题描述

我想在状态栏菜单中使用NSProgressIndicator（不确定）。我使用NSView对象作为视图的menuitem，然后subview进度指示器显示它。但每当我尝试调用startAnimation：进度，没有什么发生。当我尝试在一个正常的NSWindow做同样的事情，它的工作完美，只是不是当在一个menuitem。

I'm trying to use a NSProgressIndicator (indeterminate) inside of a statusbar-menu. I'm using an NSView-object as view for the menuitem, and then subviews the progress indicator to display it. But whenever i try to call the startAnimation: for the progress, nothing happens. When i try do the very same thing on a normal NSWindow it works perfectly, just not when inside a menuitem.

我是新的可可和objective-c我可能忽略了一些显而易见，但我已经搜索了一些解决方法，但没有成功。我发现一些关于menuitems不能更新，而显示，你需要使用无边框的窗口。但我在任何文件中都无法确认。

I'm new to both cocoa and objective-c so I might've overlooked something "obvious" but I've searched quite a bit for a workaround but without success. I found something about menuitems cant be updated while shown and that you need to use a bordeless window instead. But I have not been able to confirm this in any documentation.

编辑：

。当使用setUsesThreadedAnimation：和从MenuDelegate的菜单WillOpen和创建一个新线程。这个线程运行一个本地方法：

Ok, almost works now. When using the setUsesThreadedAnimation: and from a MenuDelegate's menuWillOpen and creating a new thread. This thread runs a local method:

-(void) doWork(NSProgressIndicator*) p{
     [p startAnimation:self];
}

这将在打开菜单时以随机。如果我直接调用 startAnimation：而不通过 doWork：（仍然使用新线程），它从来没有工作。不要 setUsesThreadedAnimation：让进度条创建它自己的动画线程？

This will start the progressindicator on a random(?) basis when opening the menu. If I call startAnimation: directly without going through doWork: (still using a new thread), it never works. Doesn't setUsesThreadedAnimation: make the progress-bar create it's own thread for the animation?

推荐答案

使用以下方式解决：

[progressIndicator performSelector:@selector(startAnimation:)
                            withObject:self
                            afterDelay:0.0
                               inModes:[NSArray 
                       arrayWithObject:NSEventTrackingRunLoopMode]];

在菜单WillOpen：中，问题似乎一直在调用startAnimation：progressbar完成绘制本身。

Inside the menuWillOpen:, the problem seems to have been calling startAnimation: before the progressbar was finished drawing itself.

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