NSOpenPanel 中缺少标题栏？
Title bar missing in NSOpenPanel?
从 OS X 10.11 开始，即使使用 setTitle，标题栏似乎也不再出现：有人知道发生了什么以及如何恢复旧行为吗？
来自AppKit Release Notes for OS X v10.11：
In 10.11, most NSOpenPanels have adopted a design that was formerly reserved only for applications which adopted iCloud Documents support and this panel design was only used if iCloud Drive was turned on in System Preferences. This note will refer to the design as the “iCloud Open Panel Design” although the design is no longer limited to applications with iCloud Documents support.
iCloud Open Panel Design没有任何标题外观，因此现在似乎已经消失了。我认为没有退路。
如果您想显示某种消息、描述或标题，您可以使用 message 属性。
从 OS X 10.11 开始，即使使用 setTitle，标题栏似乎也不再出现：有人知道发生了什么以及如何恢复旧行为吗？
来自AppKit Release Notes for OS X v10.11：
In 10.11, most NSOpenPanels have adopted a design that was formerly reserved only for applications which adopted iCloud Documents support and this panel design was only used if iCloud Drive was turned on in System Preferences. This note will refer to the design as the “iCloud Open Panel Design” although the design is no longer limited to applications with iCloud Documents support.
iCloud Open Panel Design没有任何标题外观，因此现在似乎已经消失了。我认为没有退路。
如果您想显示某种消息、描述或标题，您可以使用 message 属性。