我正在尝试创建一个小的“菜单栏小部件”。所以它并不是真正的小部件，而是一个 Cocoa 应用程序，它在扩展坞中没有图标，但在菜单或状态栏中有一个图标。
您可以通过单击按钮来触发 NSTimer，然后它应该显示倒计时。但事实并非如此……
- (void)update {
NSTimeInterval interval = [endDate timeIntervalSinceNow];
int _seconds = (int)interval%60;
int _minutes = (((int)interval-_seconds)/60)%60;
int _hours = ((int)interval-_seconds-_minutes*60)%3600;
timeLeft.stringValue = [NSString stringWithFormat:@"%i:%i:%i",_hours,_minutes,_seconds];
NSLog(@"%i:%i:%i",_hours,_minutes,_seconds);
}
那么到底发生了什么？
当我触发计时器时，界面不会更新 timeLeft 标签。 NSLog() 也不起作用。但如果我关闭盒子，NSLog 会告诉我正确的时间，如果我再次打开盒子，它会向我显示正确的时间。但它不会再更新，直到我再次关闭盒子。
I'm trying to create a small "Menubar-Widget". So it's not really a widget, but it's a Cocoa-Application, which has no icon in the dock but an icon in the menu- or statusbar.
You can fire a NSTimer by clicking a button, and then it should show a countdown. But it doesn't...
- (void)update {
NSTimeInterval interval = [endDate timeIntervalSinceNow];
int _seconds = (int)interval%60;
int _minutes = (((int)interval-_seconds)/60)%60;
int _hours = ((int)interval-_seconds-_minutes*60)%3600;
timeLeft.stringValue = [NSString stringWithFormat:@"%i:%i:%i",_hours,_minutes,_seconds];
NSLog(@"%i:%i:%i",_hours,_minutes,_seconds);
}
So what happen exactly?
When I fire the timer, the interface won't update the timeLeft Label. NSLog() won't work too. But if I close the box, the NSLog says me the correct time and if I open the box again, it's showing me the right thing. But it won't update anymore 'til I close the box again.
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我用绝对时间替换了相对时间（例如下午 2:45）...界面仍然没有更新，但没关系。
I replaced the relative time with an absolute time (e.g. 2:45 pm)... Interface is still not updating, but it's ok.