1.創(chuàng)建user表

CREATE TABLE `user` (
 `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `username` varchar(50) NOT NULL,
 `password` varchar(32) NOT NULL,
 `authKey` varchar(100) NOT NULL DEFAULT '',
 `accessToken` varchar(100) NOT NULL DEFAULT '',
 PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

2.user模型

<?php

namespace app\models;

use yii;
use yii\db\ActiveRecord;



class User extends /*\yii\base\Object*/ \yii\db\ActiveRecord implements \yii\web\IdentityInterface
{
    public $id;
    public $username;
    public $password;
    public $authKey;
    public $accessToken;


    /**
     * @inheritdoc
     */
    public static function tableName()
    {
        return 'user';
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['username', 'password'], 'required'],
            [['username'], 'string', 'max' => 50],
            [['password'], 'string', 'max' => 32],
            [['authKey'], 'string', 'max' => 100],
            [['accessToken'], 'string', 'max' => 100],
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'username' => 'Username',
            'password' => 'Password',
            'authKey' => 'AuthKey',
            'accessToken' => 'AccessToken',
        ];
    }

    /**
     * @inheritdoc
     */
    public static function findIdentity($id)
    {
        return static::findOne($id);
        //return isset(self::$users[$id]) ? new static(self::$users[$id]) : null;
    }

    /**
     * @inheritdoc
     */
    public static function findIdentityByAccessToken($token, $type = null)
    {
        return static::findOne(['access_token' => $token]);
        /*foreach (self::$users as $user) {
            if ($user['accessToken'] === $token) {
                return new static($user);
            }
        }

        return null;*/
    }

    /**
     * Finds user by username
     *
     * @param string $username
     * @return static|null
     */
    public static function findByUsername($username)
    {
        $user = User::find()
            ->where(['username' => $username])
            ->asArray()
            ->one();

        if ($user) {
            return new static($user);
        }

        return null;
        /*foreach (self::$users as $user) {
            if (strcasecmp($user['username'], $username) === 0) {
                return new static($user);
            }
        }

        return null;*/
    }

    /**
     * @inheritdoc
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @inheritdoc
     */
    public function getAuthKey()
    {
        return $this->authKey;
    }

    /**
     * @inheritdoc
     */
    public function validateAuthKey($authKey)
    {
        return $this->authKey === $authKey;
    }

    /**
     * Validates password
     *
     * @param string $password password to validate
     * @return boolean if password provided is valid for current user
     */
    public function validatePassword($password)
    {
        return $this->password === $password;
    }

    //用于生成32位的token 便于前段校驗(yàn)
    public function generateAuthKey()
    {
        $this->authKey = Yii::$app->security->generateRandomString();
    }
}

3. 控制器SiteController
   修改login方法

public function actionLogin()
    {
        if (!Yii::$app->user->isGuest) {
            return $this->goHome();
        }

        $model = new LoginForm();

        if ($model->load(Yii::$app->request->post()) && $model->login()) {
            //根據(jù)id找到該用戶
            $user = User::findOne(Yii::$app->user->id);
            //更新用戶的token  該方法在Model/User中
            $user->generateAuthKey();
            $user->save();
            return $this->goBack();
        }

        $model->password = '';
        return $this->render('login', [
            'model' => $model,
        ]);
    }