问题
I am working on sample user notification on 10.8 however the key NSUserNotificationAlertStyle when i set it to alerts not working, my application still shows it as banner, the only way to control it through the system preference but what if i want to set the default behaviour to be alert style??
回答1:
According to these two bug reports, the key NSUserNotificationAlertStyle isn't working for anyone at the moment.
http://openradar.appspot.com/12632111
http://openradar.appspot.com/12632157
回答2:
It works, but you must
- Code sign your application;
- Set alert string value for NSUserNotificationAlertStyle key in your app info.plist file;
- Make sure they are not turned off in
Notificationstab ofSystem Preferences.
If you already experiment with notifications it will be better to perform it from scratch. Here how you can remove app from User Notification Center.
回答3:
You don't need to sign your code, but the end user can change your notification type from System Preferences --> notifications (and then he can choose, None/Banner or Alert). See also this post: Add Alert vs Notification flag
回答4:
After go through every topics about this issue, I think there might be not very clear in each part, so I try to list all the steps for the developer who might also have this problem. To have the alert notification work, you can follow with Lexandr's sign steps 1,2,3, then you will get it work.
But if you are in the developing phase, or just have a debug, you still want to see what it looks like in the notification center. You need to open system preference->notifications, find your debug app, and choose the alert style to alerts. Then you can continue to develop without waiting for the sign to see the final result.
来源：https://stackoverflow.com/questions/16029755/nsusernotificationalertstyle-plist-key-not-working