如何在用户通知中设置重复频率
直到iOS 9我们写这样的local notifications
UILocalNotification* localNotification = [[UILocalNotification alloc] init]; localNotification.fireDate = pickerDate; localNotification.alertBody = self.textField.text; localNotification.timeZone = [NSTimeZone defaultTimeZone]; localNotification.repeatInterval = NSCalendarUnitMinute; localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1; [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
并在本地通知我们有repeatInterval ，现在在WWDC2016苹果宣布其中包含User Notification
- UNTimeIntervalNotificationTrigger。
-
UNCalendarNotificationTrigger。
UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:60 repeats:YES];
上面的代码会在每分钟后触发通知。 但是不能设定date。
NSDateComponents* date = [[NSDateComponents alloc] init]; date.hour = 8; date.minute = 30; UNCalendarNotificationTrigger* triggerC = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:date repeats:YES];
以上date的代码可以设置，明天8点半以后重复会在一分钟后触发。
在iOS 10 User Notification ，我可以如何设置重复频率的date时间，就像我们可以在UILocalNotification设置UILocalNotification ？
我想明天晚上8点30分安排User Notification ，每分钟之后都要重复一遍，就像上面关于local notification的代码一样
灵感来自@Ramon Vasconcelos，我使用下面的代码来设置间隔和fireDate在一起
switch (interval) { case NSCalendarUnitMinute: { unitFlags = NSCalendarUnitSecond; break; } case NSCalendarUnitHour: { unitFlags = NSCalendarUnitMinute | NSCalendarUnitSecond; break; } case NSCalendarUnitDay: { unitFlags = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond; break; } case NSCalendarUnitWeekOfYear: { unitFlags = NSCalendarUnitWeekday | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond; break; } case NSCalendarUnitMonth:{ unitFlags = NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond; } case NSCalendarUnitYear:{ unitFlags = NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond; } default: unitFlags = NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond; break; } NSDateComponents *components = [[NSCalendar currentCalendar] components:unitFlags fromDate:fireDate]; UNCalendarNotificationTrigger *trigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:interval != 0];
对于iOS 10，您可以像这样使用：
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:fireDate]; UNCalendarNotificationTrigger* trigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:YES];
它与iOS 9代码具有相同的效果。 重复你只需要使用你想重复的组件。