检测NSWindow关闭
You can declare your custom class to conform to NSWindowDelegate protocol.
Set an instance of your custom class to be the delegate of your window
Then use one of these methods (probably the windowWillClose: one) to do something before the window closes.
- (BOOL)windowShouldClose:(id)sender- (void)windowWillClose:(NSNotification *)notification
- (void)windowWillClose:(NSNotification *)notification{
settingWindowsOpen = FALSE;
[self writeUserNTPServer]; //写入NTP 服务器数据
}
也可以与NSWindowsDelegate关联（可以用代码实现，也可以用IB），也可以自己添加observer
自己添加observer：
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowWillClose:) name:NSWindowWillCloseNotification object:self.view.window];
