ios - 密码不保存

Question

我已经阅读了这里的问题，但无法找出我哪里出错了。

我知道 KeyChain 更好，但出于我的目的，我想将它存储在 NSUserDefaults 中。

当我尝试保存密码并重新输入时，它不起作用并继续到 ELSE。我在这里错过了什么？

#import "PasswordViewController.h"
#import "ViewController.h"




@interface PasswordViewController ()

@end

@implementation PasswordViewController



\

-(void) viewDidAppear: (BOOL) animated {
    [super viewDidAppear: animated];




       if(![[NSUserDefaults standardUserDefaults] boolForKey:@"AlreadyRan"] )
       {

           UIAlertController * alert=   [UIAlertController
                                         alertControllerWithTitle:@"Password"
                                         message:@"Set Your Password"
                                         preferredStyle:UIAlertControllerStyleAlert];

           UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                                      handler:^(UIAlertAction * action) {
                                                          //Do Some action here

                                                      }];
           UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault
                                                          handler:^(UIAlertAction * action) {
                                                              [alert dismissViewControllerAnimated:YES completion:nil];
                                                          }];

           [alert addAction:ok];
           [alert addAction:cancel];


           [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
               textField.placeholder = @"Password";
               textField.secureTextEntry = YES;

          [[NSUserDefaults standardUserDefaults] setObject:textField.text forKey:@"Password"];

                [[NSUserDefaults standardUserDefaults] synchronize];



           }];

           [self presentViewController:alert animated:YES completion:nil];

           [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"AlreadyRan"];

       }
}

- (IBAction)enterPassword {
    NSString * _password = [[NSUserDefaults standardUserDefaults] objectForKey:@"Password"];
   NSLog(@"passField = %@ | _password = %@", passwordField.text, _password);
    if ([passwordField.text isEqual:_password]) {
        //Password is Correct
        NSString * storyboardName = @"Main";
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
        UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"PhotoView"];
        [self presentViewController:vc animated:YES completion:nil];

    }


    else {
        //Password is wrong
        [self dismissViewControllerAnimated:YES completion: nil];

}
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(nonnull NSDictionary *)info {

    image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [ImageView setImage:image];
    [self dismissViewControllerAnimated:YES completion:NULL];
    [self dismissViewControllerAnimated:YES completion:NULL];



}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [self dismissViewControllerAnimated:YES completion:NULL];

}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

- (IBAction)enterPassword:(id)sender {
}
@end

Answer 1

NSUserDefault键区分大小写
您使用 @"Password" 保存

[[NSUserDefaults standardUserDefaults] setValue:textField.text forKey:@"Password"];

然后你用 @"password" 检索

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

除了那个问题，您从未使用过 _password变量，所以使用它:

if ([passwordField.text isEqualToString:_password) {...}

是的，你是对的，钥匙串(keychain)是保存密码的合适位置，而不是 NSUserDefault
编辑:
节省:

[[NSUserDefaults standardUserDefaults] setObject:textField.text forKey:@"Password"];

取回:

NSString * _password = [[NSUserDefaults standardUserDefaults] objectForKey:@"Password"];

测试和工作:
您必须将密码保存在 ok 完成处理程序中

-(void) viewDidAppear: (BOOL) animated {
    [super viewDidAppear: animated];
    
    if(![[NSUserDefaults standardUserDefaults] boolForKey:@"AlreadyRan3"] )
    {
        
        UIAlertController * alert=   [UIAlertController
                                      alertControllerWithTitle:@"Password"
                                      message:@"Set Your Password"
                                      preferredStyle:UIAlertControllerStyleAlert];
        
        
        
        UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                                   handler:^(UIAlertAction * action) {
                                                       NSString *password = alert.textFields[0].text;
                                                       [[NSUserDefaults standardUserDefaults] setObject:password forKey:@"Password"];
                                                       [[NSUserDefaults standardUserDefaults] synchronize];
                                                       NSLog(@"NSUserDefaults %@", [[NSUserDefaults standardUserDefaults] dictionaryRepresentation]);
                                                       
                                                   }];
        UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault
                                                       handler:^(UIAlertAction * action) {
                                                           [alert dismissViewControllerAnimated:YES completion:nil];
                                                       }];
        [alert addAction:ok];
        [alert addAction:cancel];
        
        
        [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
            textField.placeholder = @"Password";
            textField.secureTextEntry = YES;
        }];
        
        [self presentViewController:alert animated:YES completion:nil];
        [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"AlreadyRan"];
    }
}