我能够在Alamofire中使用Oauth获取数据以成功登录，但如何在另一个viewController中获取JSON数据。funcloginAccess(){letheaders=["Content-Type":"application/x-www-form-urlencoded"]letparameters=["UserName":username_textfield.text!asString,"Password":password_textfield.text!asString,"grant_type":"password",]//leturl=NSURL(string:"ht