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场景是：我需要为一组对象触发本地通知，每个对象在固定的时间间隔（以秒为单位）后，如果我提供固定的秒数，这里的代码仅适用于 1 个间隔

func DeliverMyMessage(_ dict: EnFact, _ index: Int){


    let content = UNMutableNotificationContent();
    content.body = dict.Content!;
    content.categoryIdentifier = "learn";
    content.userInfo = ["dictid": "Random Fact -\(dict.ID!)- \(dict.Reference!)" ];
    content.sound = UNNotificationSound.default();
    content.badge = 1;

    print(secArray[index]);
    var ui = TimeInterval.init(secArray[index]);

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)


    let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

    cnter.add(request, withCompletionHandler: { (error) in
        if let error = error {
            // Something went wrong
            print(error);
        }

        print("delivered");



    })


}

注意： UNTimeIntervalNotificationTrigger(timeInterval: 5 如果我提供了一个固定间隔，假设为 5 - 我从数组中触发的所有通知，在 5 秒后触发，

然后，如果我尝试在循环中以秒为单位给出计算出的差异，则通知似乎不会触发

func DeliverMyMessage(_ dict: EnFact, _ index: Int){


    let content = UNMutableNotificationContent();
    content.body = dict.Content!;
    content.categoryIdentifier = "learn";
    content.userInfo = ["dictid": "Random Fact -\(dict.ID!)- \(dict.Reference!)" ];
    content.sound = UNNotificationSound.default();
    content.badge = 1;

    print(secArray[index]);
    var ui = TimeInterval.init(secArray[index]);

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5 + ui , repeats: false)


    let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

    cnter.add(request, withCompletionHandler: { (error) in
        if let error = error {
            // Something went wrong
            print(error);
        }

        print("delivered");
        if(index < ( self.dictArray.count - 1) ){
            self.DeliverMyMessage(self.dictArray[index + 1], index + 1);
        }else{
            print("all delivered");
        }


    })


}

它说明所有交付但它不是，我使用的是 iOS 11.3 XCode 9.3 swift 4，我坚持使用它，因为这是我需要在项目中做的最后一部分 - 非常感谢任何帮助

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