简单数据持久化/NSUserDefaults(单例) 登陆界面简单验证

声明两个

@property (strong, nonatomic) IBOutlet UITextField *userName;
@property (strong, nonatomic) IBOutlet UITextField *passWord;

button点击事件

- (IBAction)sss:(id)sender {
    
    
    NSUserDefaults *user=[NSUserDefaults standardUserDefaults];
    
    
    
    if ([[user objectForKey:@"userName"]isEqualToString:self.userName.text]&&[[user objectForKey:@"passWord"]isEqualToString:self.passWord.text]) {
        
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"提示" message:@"登陆成功" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];
        [alert show];
        
    }else{
       
            
            UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"提示" message:@"登陆失败" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];
            [alert show];
            
        }
        

    
}
<pre name="code" class="objc">

NSUserDefaults 数据持久化

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
//    //NSUserDefaults(单例)
//   NSUserDefaults *user=[NSUserDefaults standardUserDefaults];
//    //数据持久化(存值)
//    [user setObject:@"Lee" forKey:@"userName"];
//    
//    [user setObject:@"123" forKey:@"passWord"];
//    //确定保存
//    [user synchronize];
//    
//    //取值
//    NSLog(@"userName:%@",[user objectForKey:@"userName"]);
//    
//    NSLog(@"passWord:%@", [user objectForKey:@"passWord"]);
//
//    
   
    
}