NSUserNotification状态

Question

是否有一种方法可以确定某个NSUserNotification是否仍在屏幕上，还是已被驳回？我还没找到办法。

Answer 1

我想你可以用协议

当用户单击用户通知中心提供的用户通知时，它会将userNotificationCenter:didActivateNotification:发送给委托。

但请记住，这也取决于所使用的通知类型。如果“横幅”，那么它可能会消失之前，用户点击它。

因此，结合委托，您还必须检查通知的类型以及是否显示了通知。

更新：我没有使用NotificationCenter。所以手边没有密码。但也要看一下常量：

NSUserNotificationActivationType
These constants describe how the user notification was activated.

enum {
NSUserNotificationActivationTypeNone = 0,
NSUserNotificationActivationTypeContentsClicked = 1,
NSUserNotificationActivationTypeActionButtonClicked = 2
}
typedef NSInteger NSUserNotificationActivationType;
Constants
NSUserNotificationActivationTypeNone
The user did not interact with the notification alert.
Available in OS X v10.8 and later.
Declared in NSUserNotification.h.
NSUserNotificationActivationTypeContentsClicked
The user clicked on the contents of the notification alert.
Available in OS X v10.8 and later.
Declared in NSUserNotification.h.
NSUserNotificationActivationTypeActionButtonClicked
The user clicked on the action button of the notification alert.
Available in OS X v10.8 and later.
Declared in NSUserNotification.h.