Question

我需要在我的iPhone应用中实现“保持登录状态”或“记住我”复选框。我该如何实现？如何存储用户ID？

非常感谢帮助，

谢谢， VKS

Answer 1

@VKS

1

-(void)autologin:(id)sender
{
    ischecked =!ischecked;
    UIButton *check = (UIButton*)sender;
    if(ischecked == NO)
        [check setImage:[UIImage imageNamed:@"checkbox1.png"] forState:UIControlStateNormal];
    else 
        [check setImage:[UIImage imageNamed:@"checkbox-pressed.png"] forState:UIControlStateNormal];
}

2

if(ischecked == YES)
{
    NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];

    [standardUserDefaults setObject:mainDelegate.uName forKey:@"username"];
    [standardUserDefaults setObject:mainDelegate.uPassword forKey:@"password"];

    [standardUserDefaults synchronize];
}

并检索密码/用户名

3

if(isChecked == YES)
{
    NSUserDefaults *standard = [NSUserDefaults standardUserDefaults];
    NSString *pass = [standard objectforkey:@"password"];
    NSString *user = [standard objectforkey:@"username"];
}
if ([pass == nil] || [user == nil])
{
    // Show the alert view that user is not valid.
}
else 
{
    // User is valid.
}

Answer 2

由于NSUserDefaults不安全，我建议使用iOS密钥链持久保存密码。

看这里：http://iosdevelopertips.com/core-services/using-keychain-to-store-username-and-password.html

Answer 3

检查复选框是否已选中，如果选中，则

         NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];

        [standardUserDefaults setObject:mainDelegate.uName forKey:@"username"];
        [standardUserDefaults setObject:mainDelegate.uPassword forKey:@"password"];

        [standardUserDefaults synchronize];

这将保存您的变量，并在登录时检查已保存的NSUserDefaults。

      if (standardUserDefaults) {

         //Here check for the values if there are any values then use the same and login
        }

检查谷歌上的任何NSUserDefaults教程，您将获得示例代码。

保持登录iPhone应用程序的选项

3 个答案: