Swift Realm 完整使用记录

platform :ios, '8.0'

target 'realmExmple' do
  use_frameworks!

pod 'RealmSwift'

end

        /*Realm 数据库配置，用于数据库的迭代更新 */let schemaVersion: UInt64 = 0
        //数据库工具类的版本号
        SSRealmTool.schemaVersion =schemaVersion
        
        let config = Realm.Configuration(schemaVersion: schemaVersion, migrationBlock: { (migration, oldSchemaVersion) in
            /*什么都不要做！Realm 会自行检测新增和需要移除的属性，然后自动更新硬盘上的数据库架构 */
            if (oldSchemaVersion <schemaVersion) {
                print("----数据库升级")
            }
        })
        
        Realm.Configuration.defaultConfiguration =config
        
        Realm.asyncOpen { (realm, error) in
            /*Realm 成功打开，迁移已在后台线程中完成 */
            if let _ =realm {

                print("Realm 数据库配置成功")
            } else if let error = error { /*处理打开 Realm 时所发生的错误 */
                print("Realm 数据库配置失败：(error.localizedDescription)")
            }
        }

classSSRealmTool {
    
    ///数据库版本号
    static var schemaVersion: UInt64 = 0
    
    ///唯一的数据库操作的 Realm
    static let ss_realm =realm()
    
    ///获取数据库操作的 Realm
    private static func realm() ->Realm {
        
        //获取数据库文件路径
        let fileURL = URL(string: NSHomeDirectory() + "/Documents/demo.realm")
        //在 APPdelegate 中需要配置版本号时，这里也需要配置版本号
        let config =Realm.Configuration(fileURL: fileURL, schemaVersion: schemaVersion)
        
        return try!Realm(configuration: config)
    }
    
}

classSSDog: Object {
    //主键不自增，如果要主键的话，这样写不会有重复的主键
//@objc dynamic var id = NSUUID().UUIDString
    //@objc dynamic **必须写
    @objc dynamic var name = ""@objc dynamic var age = 0@objc dynamic var date =Date()
    //如果需要增加属性的话，只需要在 appdelegate 的版本号加 1 即可自动升级
//@objc dynamic var weight = 1
    
    ///所属人可选
    @objc dynamic var person: SSPerson?
    
    //设置主键的方法
//override static func primaryKey() -> String? {
//return "id"
//}
}

classSSPerson: Object {

    @objc dynamic var name = ""@objc dynamic var age = 0
    
    //数组使用 List
    let dogs = List<SSDog>()
}

        let realm =SSRealmTool.ss_realm
        
        let person =SSPerson()
        person.name = "person(arc4random_uniform(1000))"person.age = Int(arc4random_uniform(20))
        
        for _ in 0..<9{
            
            let dog =SSDog()
            dog.name = "dog(arc4random_uniform(1000))"dog.age = Int(arc4random_uniform(10))
            dog.person =person
            person.dogs.append(dog)
            print("添加一只狗：(dog.name),age:(dog.age),date:(dog.date)")
        }
        
        try!realm.write {
            realm.add(person)
            print("添加一个人:(person.name)，年龄:(person.age)")
        }

        let realm =SSRealmTool.ss_realm
        print("总共有(realm.objects(SSPerson.self).count)位人")
        print("总共有(realm.objects(SSDog.self).count)只狗")
        
        if realm.objects(SSDog.self).count == 0 || realm.objects(SSPerson.self).count == 0{
            return}
        let dogs = realm.objects(SSDog.self).filter("age <= 5")
        
        for dog indogs {
            print("---查询狗:(dog.name), age:(dog.age)，主人是：(dog.person?.name ?? "无人")")
        }
        
        print("---------person---------")
        
        let persons = realm.objects(SSPerson.self).filter("age <= 10")
        
        for person inpersons {
            print("---查询name:(person.name), 有(person.dogs.count)只狗")
            print("-----每个人下面的狗-------")
            let someDogs = person.dogs.filter("age <= 5")
            for someDog insomeDogs {
                print("---查询狗:(someDog.name), age:(someDog.age)，主人是：(someDog.person?.name ?? "无人")")
            }
        }

        let realm =SSRealmTool.ss_realm
        
        let dogs = realm.objects(SSDog.self).filter("age > 5")
        
        for dog indogs {
            
            try!realm.write {
                
                print("---更新前name:(dog.name), age:(dog.age)")
                dog.name += "修改"
//realm.add(dog, update: true) //这需要主键
}
        }
        
        let dogs2 = realm.objects(SSDog.self).filter("age > 5")
        
        for dog indogs2 {
            print("---更新后name:(dog.name), age:(dog.age)")
        }

        let realm =SSRealmTool.ss_realm
        
        let person =SSPerson()
        person.name = "person(arc4random_uniform(1000))"person.age = Int(arc4random_uniform(20))
        
        for _ in 0..<9{
            
            let dog =SSDog()
            dog.name = "dog(arc4random_uniform(1000))"dog.age = Int(arc4random_uniform(10))
            dog.person =person
            person.dogs.append(dog)
            print("添加一只狗：(dog.name),age:(dog.age),date:(dog.date)")
        }
        
        try!realm.write {
            realm.add(person)
            print("添加一个人:(person.name)，年龄:(person.age)")
        }