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我在 Mac 10.8 中使用了默认的 NSButton (Push)。它被聚焦(按空格键,动作完成)但聚焦环不显示。我不知道为什么?请给我一盏灯。谢谢
我找到了问题的根本原因。我在队列块中启动了一个 NSTimer。我只是将其注释掉,问题已解决。我尝试重写这段代码。