【代码笔记】iOS-账号，密码记住

一，效果图。

二，工程图。

三，代码。

RegisViewController.h

#import <UIKit/UIKit.h>

@interface RegisViewController : UIViewController

@end

RegisViewController.m

//注册页面
#import "RegisViewController.h"
#import "LoginViewController.h"

@interface RegisViewController ()
{
    UITextField *accountField;
    UITextField *passField;
}

@end

@implementation RegisViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

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

    self.title=@"注册";

    [self initView];

}
-(void)initView
{
    accountField=[[UITextField alloc]initWithFrame:CGRectMake(50, 100, 200, 40)];
    [accountField setBackgroundColor:[UIColor redColor]];
    [accountField setPlaceholder:@"请输入账号"];
    [accountField setKeyboardType:UIKeyboardTypeNumberPad];
    [accountField setClearsContextBeforeDrawing:YES];
    [self.view addSubview:accountField];

    passField=[[UITextField alloc]initWithFrame:CGRectMake(50, 160, 200, 40)];
    [passField setBackgroundColor:[UIColor redColor]];
    [passField setPlaceholder:@"请输入密码"];
    [passField setKeyboardType:UIKeyboardTypeNumberPad];
    [passField setClearsContextBeforeDrawing:YES];
    [self.view addSubview:passField];

    UIButton *registeBut=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    registeBut.backgroundColor=[UIColor greenColor];
    registeBut.frame=CGRectMake(70, 220, 100, 40);
    [registeBut setTitle:@"注册" forState:UIControlStateNormal];
    [registeBut addTarget:self action:@selector(resis) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:registeBut];

}

//注册的时候，将账号，密码保存到本地。
-(void)resis
{

    NSUserDefaults *defaut=[NSUserDefaults standardUserDefaults];
    [defaut setObject:accountField.text forKey:@"account"];
    [defaut setObject:passField.text forKey:@"password"];
    [defaut synchronize];

    LoginViewController *login=[[LoginViewController alloc]init];
    [self.navigationController pushViewController:login animated:YES];

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

LoginViewController.h

#import <UIKit/UIKit.h>

@interface LoginViewController : UIViewController

@end

LoginViewController.m

//登陆页面
#import "LoginViewController.h"

@class RegisViewController;
@interface LoginViewController ()
{
    UITextField *accountField;
    UITextField *passField;
}
@end

@implementation LoginViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.title=@"登陆";

    [self initView];

}
-(void)initView
{
    accountField=[[UITextField alloc]initWithFrame:CGRectMake(50, 100, 200, 40)];
    [accountField setBackgroundColor:[UIColor redColor]];
    [accountField setKeyboardType:UIKeyboardTypeNumberPad];
    [accountField setClearsContextBeforeDrawing:YES];
    [accountField setText:[[NSUserDefaults standardUserDefaults] objectForKey:@"account"]];
    [self.view addSubview:accountField];

    passField=[[UITextField alloc]initWithFrame:CGRectMake(50, 160, 200, 40)];
    [passField setBackgroundColor:[UIColor redColor]];
    [passField setText:[[NSUserDefaults standardUserDefaults] objectForKey:@"password"]];
    [passField setKeyboardType:UIKeyboardTypeNumberPad];
    [passField setClearsContextBeforeDrawing:YES];
    [self.view addSubview:passField];

    UIButton *loginBut=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    loginBut.backgroundColor=[UIColor greenColor];
    loginBut.frame=CGRectMake(70, 220, 100, 40);
    [loginBut setTitle:@"登陆" forState:UIControlStateNormal];
    [loginBut addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:loginBut];

}
-(void)login
{
    [self.navigationController popViewControllerAnimated:YES];
}