If I create a project in Xcode 4.1, and set the MainMenu.xib to have two NSPanels, and put a NSTextField in both panels, if I set one of the NSPanels to not show the "Title Bar", then the textfield within that panel can not be clicked on or given focus.
如果我在Xcode 4.1中创建一个项目，并将MainMenu.xib设置为有两个NSPanel，并在两个面板中放置一个NSTextField，如果我将其中一个NSPanel设置为不显示“Title Bar”，那么该面板中的文本字段不能点击或给予焦点。
Why??
为什么？？
1 个解决方案
#1
9
A window (or a panel) without a titlebar cannot become key, so it can't get the focus. You have to subclass it and override its - (BOOL)canBecomeKey method, like this:
没有标题栏的窗口（或面板）不能成为键，因此无法获得焦点。你必须对它进行子类化并覆盖它的 - （BOOL）canBecomeKey方法，如下所示：
@interface MyPanel : NSPanel
@end
@implementation MyPanel
- (BOOL)canBecomeKeyWindow {
return YES;
}
@end
#1
9
A window (or a panel) without a titlebar cannot become key, so it can't get the focus. You have to subclass it and override its - (BOOL)canBecomeKey method, like this:
没有标题栏的窗口（或面板）不能成为键，因此无法获得焦点。你必须对它进行子类化并覆盖它的 - （BOOL）canBecomeKey方法，如下所示：
@interface MyPanel : NSPanel
@end
@implementation MyPanel
- (BOOL)canBecomeKeyWindow {
return YES;
}
@end