realm基础数据封装代码，实现增删查改

DBBaseObject.swift

//
//  DBBaseObject.swift
//  DianZiCheng
//
//  Created by jackyshan on 2017/5/28.
//  Copyright © 2017年 jackyshan. All rights reserved.
//

import UIKit

class DBBaseObject: Object {
    dynamic var note1: String?//备份
    dynamic var note2: String?//备份
    
    func add() {//增
        let realm = try! Realm()
        try! realm.write {
            realm.add(self)
        }
    }
    
    func delete() {//删
        let realm = try! Realm()
        try! realm.write {
            realm.delete(self)
        }
    }
    
    static func query<T>(_ type: T.Type, _ filterStr: String? = nil) -> Results<T> {//查
        let realm = try! Realm()
        
        if let str = filterStr {
            return realm.objects(type).filter(str)
        }
        else {
            return realm.objects(type)
        }
    }
    
    //多线程查询
    static func query<T>(_ type: T.Type, _ filterStr: String? = nil, block:@escaping ((_ results: Results<T>)->Void)) {
        DispatchQueue(label: "background").async {
            let realm = try! Realm()
            
            if let str = filterStr {
                let objects = realm.objects(type).filter(str)
                block(objects)
            }
            else {
                let objects = realm.objects(type)
                block(objects)
            }
        }
    }
    
    static func update(_ block: (() throws -> Swift.Void)) {//改
        let realm = try! Realm()
        try! realm.write(block)
    }
}