Question

我正在通过swift应用程序中的api调用从服务器获取JSON数据。因此，我想将其存储到Realm数据库中，再次需要获取以显示在表视图中。

我对Realm数据库一无所知，之后，检查了几个论坛，我对创建Object类有了基本的了解。

因此，我已经安装了Realm pod文件并将该库导入到我的类中。

我的JSON数据是

[{
"type": "story",
"story": 

{
"author-name": "",
"headline": "Quotes ",
"summary": "Best quotes of Muhammad Ali",
"hero-image": "https://image”
}
},
{
"type": “Trending”,
"story": 
    {
    "author-name": "",
    "headline": "Quotes ",
    "summary": "Best quotes of Muhammad Ali",
    "hero-image": "https://image”
    }
    },
    {
    "type": “Technology”,
    "story": 

    {
    "author-name": "",
    "headline": "Quotes ",
    "summary": "Best quotes of Muhammad Ali",
    "hero-image": "https://image”
    }
    },
    {
    "type": “Top”,
    "story": 

    {
    "author-name": "",
    "headline": "Quotes ",
    "summary": "Best quotes of Muhammad Ali",
    "hero-image": "https://image”
    }
    }
    ]

而且我每个 type 关键字都有与api数据不同的模型类保存数据，以显示在 Tableview

中

喜欢

let storyObj = StoryModule()
let trending = StoryModule()
let technology = StoryModule()
let stotopryObj1 = StoryModule()

并且我正在为每种类型

保存每个键值

if abc.type == "story" {
    let storyObj = abc.story
    storyObj.authorname = storyObj?.authorname
    storyObj.heroimage = storyObj?.heroimage
    storyObj.headline = storyObj?.headline
    storyObj.summary = storyObj?.summary
    self.treningStoriesList.append(storyObj)
}

其余的趋势，热门和技术对象也是如此。

并且Realm模块是

import RealmSwift

class DemoInfo: Object {
    @objc dynamic var category = ""
    let items = List<DemoList>()
}

class DemoList : Object {
    @objc dynamic var authorName = ""
    @objc dynamic var imageUrl = ""
    @objc dynamic var summary = ""
    @objc dynamic var headLine = ""
}

在MainViewController类中，

let realmDB = try! Realm()

但是，在这里，我很震惊，如何保存这些storyObj,technology,top, etc模块数据并提取。

有人可以建议我吗？

Answer 1

如果要在数据库中添加领域对象，则必须为每个领域对象类定义一个主键。因此，在您可以像这样创建领域对象之后，您需要更改JSON文件；

DemoObject.swift

import RealmSwift

class DemoObject: Object {

    @objc dynamic var id: String = ""
    @objc dynamic var type: String = ""
    @objc dynamic var subObject: SubObject?

    override static func primaryKey() -> String? {
        return "id"
    }
}

SubObject.swift

import RealmSwift

class SubObject: Object {

    @objc dynamic var id: String = ""
    @objc dynamic var authorName: String = ""
    @objc dynamic var imageUrl: String = ""
    @objc dynamic var summary: String = ""
    @objc dynamic var headLine: String = ""

    override static func primaryKey() -> String? {
        return "id"
    }
}

然后，您可以使用这些代码添加数据库。

let realm = try! Realm()

let demo = DemoObject()
demo.id = "1"

let sub = SubObject()
sub.id = "1"
sub.authorName = "Author Name"
sub.headLine = "Head Line"
sub.summary = "image Url"

demo.subObject = sub

try! realm.write {
    realm.add(demo, update: true)
}

如何在Swift中将字典数组存储到Realm数据库

1 个答案: