flex 登录时记住用户名和密码功能实现

此方法记住用户名和密码是跨浏览器的，因为保存用户名和密码的的文件保存在本地flash文件中 
第一步，存放用户名和密码在flash本地文件中 

var userInfoCookie:SharedObject = SharedObject.getLocal("userInfoCookie"); 
if(rememberUNAndPwd.selected) { 
    userInfoCookie.data.userName = this.username.text; 
    userInfoCookie.data.password = this.password.text; 
    userInfoCookie.data.isRememberUsernameAndPassword = true; 
} else { 
    userInfoCookie.data.userName = ""; 
    userInfoCookie.data.password = ""; 
    userInfoCookie.data.isRememberUsernameAndPassword = false; 
} 
userInfoCookie.flush(); 

第二步 ，把在flash本地文件中的用户名和密码取出，显示在界面上

var userInfoCookie:SharedObject = SharedObject.getLocal("userInfoCookie"); 
if(userInfoCookie.data.hasOwnProperty("userName") && userInfoCookie.data.isRememberUsernameAndPassword 
&& userInfoCookie.data.userName != "") { 
    this.username.text = userInfoCookie.data.userName; 
    this.password.text = userInfoCookie.data.password; 
    this.rememberUNAndPwd.selected = true; 
}