Question

我有一个领域对象Activity，它包含许多变量，包括领域对象User，Profile和Board。这是对象的声明

class RealmActivity: Object
{
    dynamic var user: RealmProfile?
    dynamic var noticeId = ""
    dynamic var notice: RealmNotice?
    dynamic var board: RealmBoard?
    dynamic var type = ""
    dynamic var date = Date()
    dynamic var text = ""
    dynamic var commentContent = ""
}

以下是从Class到Realm Object的转换

func cacheActivity(activity: Activity) -> RealmActivity
{
    let realm = RealmActivity()

    if activity.user != nil {
        realm.user = cacheUser(user: activity.user!)
    }
    if activity.noticeId != nil {
        realm.noticeId = activity.noticeId!
    }
    if activity.notice != nil {
        realm.notice = cacheNotice(notice: activity.notice!)
    }
    if activity.board != nil {
        realm.board = cacheBoard(board: activity.board!, tag: "activity")
    }
    realm.type = activity.type!
    realm.date = activity.date!

    if activity.text != nil {
        realm.text = activity.text!
    }

    if activity.commentContent != nil {
        realm.commentContent = activity.commentContent!
    }

    return realm
}

这是缓存所有活动的方法。我首先获取所有已缓存的对象并删除它们。然后我获得更新的活动列表并将它们添加到领域

func cacheAllActivities()
{
    let realmCached = realm.objects(RealmActivity.self)

    let activities = SessionManager.sharedInstance.dashboard.activities
    var realmActivities = [RealmActivity]()

    if activities.count > 0 {
        try! realm.write()
        {
            realm.delete(realmCached)

            for activity in activities
            {
                let realmActivity = cacheActivity(activity: activity)
                self.realm.add(realmActivity)
                realmActivities.append(realmActivity)
            }
        }
    }
}

我正在使用此对象将推送通知保留为手机上的活动。当我写一个对象时，第一次回到应用程序时，我设法用它的所有对象检索它而没有问题。当我关闭应用程序并再次检索它时，我的对象RealmProfile，RealmNotice和RealmBoard在它们不应为空时返回nil。其余数据存在，只返回对象中的对象。当我多次检索对象时，会发生这种情况。之后它总是零。每次重启后我都不会重写该对象。我已经在这几天了，任何帮助都将不胜感激。

谢谢！

对象中的领域对象返回nil

0 个答案: