iOS实现账号、密码记住功能

#import <UIKit/UIKit.h>@interface RegisViewController : UIViewController@end

 //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.}

#import <UIKit/UIKit.h>@interface LoginViewController : UIViewController@end

 //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];}