swift - 在 Realm、Swift 中按天从 NSDate 过滤

Question

因此，我将 NSDate 放入 Realm 模型中:

class GeneralList: Object {
    dynamic var createdAt = NSDate()
    dynamic var notes = ""
}

例如，如何获取 27.03.2016 中的所有“笔记”？

Answer 1

你可以实现这个功能，来自Rafael的 answer

private func createMessageRealmModelFromIncomingMessage(incomingMessage: MessageRestModel) -> MessageRealmModel {
    let messageRealmModel = MessageRealmModel()

    messageRealmModel.id = incomingMessage.id!
    messageRealmModel.messageType = "CHAT_MESSAGE"
    messageRealmModel.value = (incomingMessage.content?.value)!
    messageRealmModel.senderId = incomingMessage.senderId!
    messageRealmModel.recipientId = incomingMessage.recipientId!
    messageRealmModel.sendDate = incomingMessage.sendDate!
    messageRealmModel.serverDeliveryDate = incomingMessage.serverDeliveryDate!
    messageRealmModel.receiverDeliveryDate = NSDate().msFromEpoch()

    return messageRealmModel
}

然后将它用作 Realm 的 filter 函数的参数，如下所示:

var c = NSDateComponents()
c.year = 2016
c.month = 3
c.day = 27

var date = NSCalendar(identifier: NSCalendarIdentifierGregorian)?.dateFromComponents(c)

let generalListsInDay = realm.objects(GeneralList).filter(self.predicateForDayFromDate(day))

执行此代码后，您的 generalListsInDay 应包含 2016 年 3 月 27 日的所有 GeneralList