Question

我目前正在创建一个支持iOS 8及更高版本的应用。在我的应用中，我想做每日通知，如“当天的话”。所以我尝试了localNotification，因为iOS 8-9正在使用UILocalNotification，而ios10正在使用NSNotificationcenter。但我现在卡住了，因为我试图传递alertBody中的变量。它是打印空的，因为我从url会话请求得到它的那天的话。所以我想知道，我该怎么做？请帮忙！

Answer 1

您可以使用本地通知来获取每日通知。

let notification = UILocalNotification()
notification.fireDate = date
notification.alertBody = "Alert!"
notification.alertAction = "open"
notification.hasAction = true
notification.userInfo = ["UUID": "reminderID" ]
notification.repeatInterval = NSCalendarUnit.CalendarUnitDay
UIApplication.sharedApplication().scheduleLocalNotification(notification)

使用KCFCalenderUnitDay，您的通知每天都会被触发，但正如您所提到的，您需要从服务器获取每天的响应，用户需要单击通知。如果没有单击或用户交互，则不会调用此方法。在此方法中，您可以调用您的服务并再次设置本地通知。

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {

let state : UIApplicationState = application.applicationState
if (state == .Inactive || state == .Background) {
    // go to screen relevant to Notification content
} else {
    // App is in UIApplicationStateActive (running in foreground)
}
}

将日期设定为上午9点

let date: NSDate = NSDate()
    let cal: NSCalendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierISO8601)!
    cal.timeZone = NSTimeZone(name: "GMT")!
    let newDate: NSDate = cal.dateBySettingHour(9, minute: 0, second: 0, ofDate: date, options: NSCalendarOptions())!

添加天数

NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
dayComponent.day = 1;

NSCalendar *theCalendar = [NSCalendar currentCalendar];
NSDate *nextDate = [theCalendar dateByAddingComponents:dayComponent toDate:[NSDate date] options:0];


//Swift
var tenDaysfromNow: Date {
   return (Calendar.current as NSCalendar).date(byAdding: .day, value: 10, to: Date(), options: [])!
}

如何从字典应用程序创建一天中的单词通知？

1 个答案: