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我必须使用Twilio iOS SDK实现App to App功能.我在应用程序运行时成功实现了语音呼叫.现在,当应用程序被杀时,我遇到了问题.如何获得来电的VOIP推送通知？

我指的是这个链接:https://www.twilio.com/docs/api/notifications/guides/sending-notifications

VOIP来电没有VOIP推送文档.

请尽快向我提供一些有用的想法/解决方案.

我正在努力audio/video call并尝试将来电呼叫notification循环播放1分钟,就像WhatsApp在iOS应用程序是背景时显示,Notification banner隐藏并显示铃声1分钟.

我试过这段代码,它只触发一次:

 UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
    content.title = [NSString stringWithFormat:@"Video Call from %@",userId];
    content.body = @"";
    content.userInfo = [userInfo mutableCopy];
    content.sound = [UNNotificationSound soundNamed:@""];

    NSDate *now = [NSDate date];
    now = [now dateByAddingTimeInterval:3];
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    [calendar setTimeZone:[NSTimeZone localTimeZone]];

    NSDateComponents *components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute|NSCalendarUnitSecond|NSCalendarUnitTimeZone fromDate:now];

    UNCalendarNotificationTrigger *trigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:NO];
    UNNotificationRequest * request = [UNNotificationRequest requestWithIdentifier:@"INCOMING_VOIP_APN" content:content trigger:trigger];

    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    center.delegate …