iOS(Swift)Singleton Realm对象 [英] iOS (Swift) Singleton Realm Object

问题描述

阅读此教程后，我需要一些帮助来了解最有效的方法方法如下.

After reading this tutorial I need some assistance in understanding what the most efficient way to do the following.

打开我的应用程序时，它需要加载一个Profile对象.由于在应用程序的生命周期中应该只有其中之一，因此我将其设置为单例.

When my app is opened, it needs to load a Profile object. Since there should only be one of these in the lifetime of the app I set it up to be a singleton.

领域似乎是保存和检索数据的好方法.进一步查看后，我似乎需要一个数据模型才能使用Realms.在尝试将Object集成到下面所示的Profile.swift中失败之后，我需要一些如何处理此问题的帮助.我应该创建第二个类ProfileDataModel，以供Profile调用以检索和保存更改，还是可以将Realm Object包含在Singleton类中?

Realm seemed to be a great way to save and retrieve data. Upon further viewing it seems I need to have a data model in order to use Realms. After a failed attempt of integrating Object into the Profile.swift shown below I need some assistance in how I should handle this issue. Should I make a second class ProfileDataModel that can be called by Profile to retrieve and save changes, or is there a way to include a Realm Object into a Singleton class?

Profile.swift

Profile.swift

class Profile {

    //MARK: Singleton
    static let sharedInstance = Profile()

    //MARK: Properties
    var characterName: String
    var level: Int

    //MARK: Init
    private init() {
        //TODO: Load from realms
        self.characterName = "John Appleseed"
        self.level = 50
    }

    //MARK: Helper Methods
    static func save(){
        //TODO: Save to Realm
    }
}

推荐答案

我建议您创建一个数据库管理器类以处理所有数据库操作，然后可以分别创建数据模型并使用管理器类来获取/将数据存储在您的数据库中.

I suggest you to create a db manager class to handle all db operations on it, then you can create your data models separately and use your manager class to fetch/store data on your db.

class DBManager {
//MARK: Singleton
static let sharedInstance = DBManager()

//MARK: Init
private override init(){
    let config = Realm.Configuration(
        fileURL: dbPath,
        readOnly: false)
    do{
        myDB = try Realm(configuration: config)
        print(dbPath)
    }
    catch{
        print("boooom")
    }

}

    //retrive data from db
    func getDataFromDB() -> Results<DataModel>{
    let results: Results<NewsModel> = myDB.objects(DataModel)
    return results
    }

    //write an object in db
    func addDataModelEntry(object: DataModel){
        try! myDB.write{
            myDB.add(object, update: true)
        }
    }

}

//your controller you want to use your db manager class
class main(){ 
    func viewDidLoad(){
       DBManager.sharedInstance.getDataFromDB() ///here you have realm results

       DBManager.sharedInstance.addDataModelEntry(customDataModel) //to store your object on db
    }
}

我仅举一些示例来说明这样做的方式，您可以使用这些功能将其扩展为满足特定需求的任何类型的db操作.

i put some samples just to show the way of doing, you can use these functions to extend to any kind of db operations for your specific needs.

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