import UIKit

class FiveVC: UIViewController {

    //MARK:-------- 全局 常量 设置

    let IsFirstLaunch = "IsFirstLaunch"

    let UserName = "UserName"

    let UserPwd = "UserPwd"

    var nameField = UITextField()

    var PwdField = UITextField()

    override func viewDidLoad() {

        super.viewDidLoad()

        nameField = UITextField(frame:CGRect(x:,y:,width:,height:))

        nameField.backgroundColor = UIColor.cyan

        nameField.placeholder = "请输入姓名"

        nameField.borderStyle = UITextBorderStyle.roundedRect

        self.view.addSubview(nameField)

        PwdField = UITextField(frame:CGRect(x:,y:,width:,height:))

        PwdField.backgroundColor = UIColor.cyan

        PwdField.placeholder = "请输入密码"

        PwdField.borderStyle = UITextBorderStyle.roundedRect

        self.view.addSubview(PwdField)

        let keetBtn = UIButton.init()

        keetBtn.frame = CGRect(x:,y:,width:,height:)

        keetBtn.backgroundColor = UIColor.cyan

        keetBtn.setTitle("保存", for: UIControlState.normal)

        keetBtn.setTitleColor(UIColor.black, for: UIControlState.normal)

        keetBtn.addTarget(self, action: #selector(pressKeepBtn), for: UIControlEvents.touchUpInside)

        self.view.addSubview(keetBtn)

        let reduceBtn = UIButton.init()

        reduceBtn.frame = CGRect(x:,y:,width:,height:)

        reduceBtn.backgroundColor = UIColor.cyan

        reduceBtn.setTitle("清空", for: UIControlState.normal)

        reduceBtn.setTitleColor(UIColor.black, for: UIControlState.normal)

        reduceBtn.addTarget(self, action: #selector(pressReduceBtn), for: UIControlEvents.touchUpInside)

        self.view.addSubview(reduceBtn)

        let userName = LCDUserDefaultsGet(key: UserName) as! String

        let userPwd = LCDUserDefaultsGet(key: UserPwd) as! String

        print("\(userName):\(userPwd)")

        if userName.characters.count >  {

            freshDate(isOk: true, userName: userName, userPwd: userPwd)

        }

        /*

        //obj 为bool值的时候 调用

        if LCDUserDefaultsBool(key: UserName) {

            let userName = LCDUserDefaultsGet(key: UserName) as! String

            let userPwd = LCDUserDefaultsGet(key: UserPwd) as! String

            print("\(userName):\(userPwd)")

        }

        print(LCDUserDefaultsBool(key: UserName))

 */

    }

    //刷新数据

    func  freshDate(isOk:Bool, userName:String, userPwd:String){

        if isOk {

            nameField.placeholder = ""

            nameField.text = userName

            PwdField.placeholder = ""

            PwdField.text = userPwd

        }else{

            nameField.placeholder = "请输入姓名"

            nameField.text = ""

            PwdField.placeholder = "请输入密码"

            PwdField.text = ""

        }

    }

    //保存数据

    func pressKeepBtn(){

        if nameField.text?.characters.count ==  {

            alterShow(titles: "请输入姓名")

            return

        }

        if PwdField.text?.characters.count ==  {

            alterShow(titles: "请输入密码")

            return

        }

        LCDUserDefaultsSet(key: UserName,obj: nameField.text as AnyObject)

        LCDUserDefaultsSet(key: UserPwd,obj: PwdField.text as AnyObject)

        LCDUserDefaultsSyn()

        let userName = LCDUserDefaultsGet(key: UserName) as! String

        let userPwd = LCDUserDefaultsGet(key: UserPwd) as! String

        freshDate(isOk: true, userName: userName, userPwd: userPwd)

        alterShow(titles: "数据已保存成功")

    }

    //清空数据

    func pressReduceBtn(){

        LCDUserDefaultsSet(key: UserName,obj: "" as AnyObject)

        LCDUserDefaultsSet(key: UserPwd,obj: "" as AnyObject)

        LCDUserDefaultsSyn()

        freshDate(isOk: false, userName: "", userPwd: "")

        alterShow(titles: "数据已清空成功")

    }

    //MARK:------------- LCDUserDefaults

    //保存

    func LCDUserDefaultsSet(key:String, obj:AnyObject) -> Void {

        return UserDefaults.standard.set(obj, forKey: key)

    }

    //获取

    func LCDUserDefaultsGet(key:String) -> AnyObject {

        return UserDefaults.standard.value(forKey: key)! as AnyObject

    }

    //删除

    func LCDUserDefaultsRemo(key:String) -> Void {

        UserDefaults.standard.removeObject(forKey: key)

    }

    //判断bool 类型的值

    func LCDUserDefaultsBool(key:String) -> Bool {

        return UserDefaults.standard.bool(forKey: key)

    }

    func LCDUserDefaultsSyn() {

        UserDefaults.standard.synchronize()

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    func alterShow(titles:String){

        let alertController = UIAlertController(title: "提示",

                                                message: titles, preferredStyle: UIAlertControllerStyle.alert)

        let cancelAction = UIAlertAction(title: "取消", style: UIAlertActionStyle.cancel, handler: nil)

        let okAction = UIAlertAction(title: "好的", style: UIAlertActionStyle.default,

                                     handler: {

                                        action in

                                        print("点击了确定")

        })

        alertController.addAction(cancelAction)

        alertController.addAction(okAction)

        self.present(alertController, animated: true, completion: nil)

    }

}