Question

我想在用户选择“记住我”复选框时保存密码。我有这样的代码：这是正确的吗？

在Appdelegate.m

@property(strong,nonatomic)NSString *savedno;

<。>文件中的

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];

    self.navcontrol =[[UINavigationController alloc]initWithRootViewController:self.viewController ];

    self.window.rootViewController = self.navcontrol;
    [self.window makeKeyAndVisible];

    self.savedno=[[NSUserDefaults standardUserDefaults]objectForKey:@"pass"];

    if(savedno==nil)
    {
        NSDictionary *saveDict=[NSDictionary dictionaryWithObject:savedno forKey:@"pass"];
        [[NSUserDefaults standardUserDefaults]registerDefaults:saveDict];
    }
    return YES;
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    /*
     Called when the application is about to terminate.
     Save data if appropriate.
     See also applicationDidEnterBackground:.
     */

    NSUserDefaults *userdefault=[NSUserDefaults standardUserDefaults];
    [userdefault setObject:savedno forKey:@"pass"];
}

// ViewDelegate.m文件

//复选框事件

-(IBAction)check:(id)sender
{
    if (checkboxSelected == 0)
    {
        [checkboxButton setSelected:YES];
        [checkboxButton setImage:[UIImage imageNamed:@"checkbox-checked.png"]forState:UIControlStateNormal];

        // userdefault=[NSUserDefaults standardUserDefaults];
        // [userdefault setObject:user.text forKey:@"user"];
        // [userdefault setObject:pass.text forKey:@"pass"];
        self.callno=pass.text;
        pass.text=self.callno;
        AppDelegate *appdelegate=[[UIApplication sharedApplication]delegate];
        appdelegate.savedno=self.callno;

        NSLog(@"Data saved");    
        checkboxSelected = 1;        
    }
    else
    {
        [checkboxButton setSelected:NO];
        [checkboxButton setImage:[UIImage imageNamed:@"checkbox.png"]forState:UIControlStateNormal];                                 
        user.text=@"";
        pass.text=@"";
        checkboxSelected = 0;
    }
}

- (void)viewDidLoad
{
    user.clearButtonMode=UITextFieldViewModeWhileEditing;

    AppDelegate *appdel=[[UIApplication sharedApplication]delegate];

    if([user.text isEqualToString:@"bhoomi"])
    {
        pass.text=appdel.savedno;
    }
    [super viewDidLoad];

    checkboxSelected = 0;

    // Do any additional setup after loading the view, typically from a nib.
}
`

Answer 1

别。 NSUserDefaults不是密码等机密信息的地方。相反，请使用KeyChain。

Answer 2

您应该使用钥匙串存储密码等信息。

查看SFHFKeychainUtils，它可以让您轻松使用应用中的钥匙串。它提供了两种方法：storeUserName：andPassword：和getPasswordForUsername，它们会使它变得简单，安全！

Answer 3

要保存到用户默认值，请执行以下操作

[[NSUserDefaults standardUserDefaults] setValue:@"YourPassword" forKey:@"passowrd"];
//then call
[[NSUserDefaults standardUserDefaults] synchronize];

将其取回

NSString *password = [[NSUserDefaults standardUserDefaults] valueForKey:@"password"];

Answer 4

将值设置为NSUserDefaults后，您必须同步一次才能保存它。使用以下语句来执行此操作。

[[NSUserDefaults standardUserDefaults] synchronize];

希望这有帮助。

修改

将凭证存储到钥匙串而不是NSUserDefaults是明智的。

Use this KeyChain Helper class for the same

Answer 5

使用此代码...

NSUserDefault *userDefault = [NSUserDefaults standardUserDefaults];

[userDefault  setValue:pass_str forKey:@"pass"];

[userDefault  synchronize];

这可能会对你有帮助......

如何使用NSUserDefault在UserDefault中保存密码？

5 个答案: