使用 UUID 管理本地通知
通常,你需要能夠管理通知,能夠跟蹤並取消通知。
跟蹤通知
你可以為通知分配 UUID(通用唯一識別符號),以便跟蹤它:
迅速
let notification = UILocalNotification()
let uuid = NSUUID().uuidString
notification.userInfo = ["UUID": uuid]
UIApplication.shared.scheduleLocalNotification(notification)
Objective-C
UILocalNotification *notification = [[UILocalNotification alloc] init];
NSString *uuid = [[NSUUID UUID] UUIDString];
notification.userInfo = @{ @"UUID": uuid };
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
取消通知
要取消通知,我們首先會獲得所有通知的列表,然後找到具有匹配 UUID 的通知。最後,我們取消它。
迅速
let scheduledNotifications = UIApplication.shared.scheduledLocalNotifications
guard let scheduledNotifications = scheduledNotifications else {
return
}
for notification in scheduledNotifications where "\(notification.userInfo!["UUID"]!)" == UUID_TO_CANCEL {
UIApplication.sharedApplication().cancelLocalNotification(notification)
}
Objective-C
NSArray *scheduledNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
for (UILocalNotification *notification in scheduledNotifications) {
if ([[notification.userInfo objectForKey:"UUID"] compare: UUID_TO_CANCEL]) {
[[UIApplication sharedApplication] cancelLocalNotification:notification];
break;
}
}
你可能希望將所有這些 UUID 儲存在 Core Data 或 Realm 中。