简单点, 直接点, 暴力点

1. 封装 ArrayObjectRealm 管理类

import Foundation
import RealmSwift
// 元素为对象的数组存储
open class ArrayObjectRealm<T: Object>: RealmManager {
    
    // 增
    open func insert(_ t: T) {
        try? realm.write {
            realm.add(t)
        }
    }
    
    // 删
    open func delete(_ t: T) {
        try? realm.write {
            realm.delete(t)
        }
    }
    
    // 删除所有
    open func deleteAll() {
        try? realm.write {
            for item in allValue() {
                realm.delete(item)
            }
        }
    }
    
    // 更新
    open func update(t: T,_ callback: (T) -> ()) {
        try? realm.write{ callback(t)  }
    }
    
    // 查所有对象
    open func allValue() -> [T] {
        var ts: [T] = []
        realm.objects(T.self).forEach { t in
            ts.append(t)
        }
        return ts
    }
    
    // 查某个主键值为'key'的对象
    open func value(from key: String) -> T? {
        return realm.object(ofType: T.self, forPrimaryKey: key)
    }
}

2. 创建 数组元素模型:

import RealmSwift
import ObjectMapper

public class FileModel: Object, Mappable {
    
    // 文件名称
    @Persisted public var name = ""
    // 文件创建时间
    @Persisted public var date = Date()
    // 第二名称
    @Persisted public var secondName = ""
    
    // 设置主键
    public override class func primaryKey() -> String? {
        return "name"
    }
    
    public override init() {
        super.init()
    }
    
    /// 以下两个函数为ObjectMapper 协议方法
    public required init?(map: ObjectMapper.Map) { }
    
    public func mapping(map: ObjectMapper.Map) {
        name <- map["name"]
        date <- map["date"]
        secondName <- map["secondName"]
    }
}

3. 创建需要存储的数组对象FileModel管理类, 继承自ArrayObjectRealm

import RealmSwift
import Foundation

public class FilesManager: ArrayObjectRealm<FileModel> {
    // 单例访问
    public static let shared = FilesManager()
    
    // 数组, 方便访问
    public var files: [FileModel] = []
    
    public override init() {
        super.init()
        files = allValue()
    }
    
    /// 给数组插入新对象
    public override func insert(_ t: FileModel) {
        super.insert(t)
        files = allValue()
    }
    
    /// 删除数组中指定对象
    public override func delete(_ t: FileModel) {
        super.delete(t)
        files = allValue()
    }
    
    /// 删除数组中指定对象
    public override func deleteAll() {
        super.deleteAll()
        files = allValue()
    }
    
    /// 更新数组中某个对象
    public override func update(t: FileModel, _ callback: (FileModel) -> ()) {
        super.update(t: t, callback)
        files = allValue()
    }
    
    /// 通过主键过去某个对象
    public override func value(from key: String) -> FileModel? {
        return super.value(from: key)
    }
}

4. 使用

请点击打开 示例demo 查看: Example/Database/ViewController.swift文件