objective-c - NSUserNotification 状态

Question

有没有办法确定某个 NSUserNotification 是否仍在屏幕上或已被关闭？我还没有找到执行此操作的方法。

Answer 1

我想你可以使用 NSUserNotificationCenterDelegate_Protocol

它有userNotificationCenter:didActivateNotification:当用户点击用户通知中心显示的用户通知时发送给委托(delegate)。

但请记住，这还取决于所使用的通知类型。如果是“横幅”，则它可能会在用户点击之前消失。

因此，与委托(delegate)一起，您还必须检查通知的类型以及它是否已呈现。

更新:我没有使用过通知中心。所以手头没有代码。但也要看看常量:

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.