如何使NSUserNotification超时？

Question

我正在使用这个方法：

NSUserNotification *notification = [[NSUserNotification alloc] init];
            notification.title = @"Title";
            notification.informativeText = @"body";
            notification.soundName = NSUserNotificationDefaultSoundName;

            [[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:notification];

如何让它在3秒后超时？

Answer 1

将NSTimer设置为三秒钟后触发，然后使用NSUserNotificationCenter的removeDeliveredNotification删除通知。

例如，为了简洁和清晰，使用NSTimer+blocks：

[NSTimer scheduledTimerWithTimeInterval:3.0 block:^
{
    [[NSUserNotificationCenter defaultUserNotificationCenter] removeDeliveredNotification: notification];
} repeats:NO];

请注意，这并不是关于使用NSTimer类别的说明或建议-- API并不是很好:-)

Answer 2

我自己解决了这个问题！我使用usleep()等待，然后在3秒后将其删除。希望这能有所帮助

            NSUserNotification *notification = [[NSUserNotification alloc] init];
            notification.title = @"Upload Failed!";
            notification.informativeText = @"Error reading data.";
            notification.soundName = NSUserNotificationDefaultSoundName;
            [[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:notification];
            usleep(3000000); //waits for 3 seconds
            [[NSUserNotificationCenter defaultUserNotificationCenter] removeDeliveredNotification: notification];