这是一个QQ登陆的程序，要求注册账号，可以进行登陆，而且账号信息能够记忆保存，下次可以继续进行登陆
ViewController.h文件：
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
- (IBAction)Register:(id)sender;
- (IBAction)Cancel:(id)sender;
@property (weak, nonatomic) IBOutlet UILabel *xinxi;
- (IBAction)Go:(id)sender;
@property (weak, nonatomic) IBOutlet UITextField *password;
@property (weak, nonatomic) IBOutlet UITextField *number;
@end
ViewController.m文件：
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_xinxi.text=@"你好，如果第一次注册，请输入密码";
dict2 = [NSMutableDictionary dictionaryWithCapacity:10];
_number.enabled=YES; //账号可写性
_password.secureTextEntry=YES; //密码的隐身功能
// Do any additional setup after loading the view, typically from a nib.
// UIAlertView *al=[[UIAlertView alloc]initWithTitle:@"登录信息" message:@"成功" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确认", nil];
// [al show];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
static
NSMutableDictionary * dict2;
//注册按钮
- (IBAction)Register:(id)sender {
// NSString * number = _number.text;
NSString * password = _password.text;
if ([password length]<6)
{
_xinxi.text=@"你好，密码和账号都至少六位数字";
}
else
{
//将当前的时间戳给为qq账号
NSDate *dataaa=[NSDate new];
NSInteger longlo=(long)[dataaa timeIntervalSince1970];
NSString *number=[NSString stringWithFormat:@"%ld",longlo];
_number.text=number;
//解档
NSData *nutabdata = [[NSData alloc]initWithContentsOfFile:@"/Users/feifanchengxuyuan/Desktop/qqqq.plist"];
NSKeyedUnarchiver *unkeyed=[[NSKeyedUnarchiver alloc]initForReadingWithData:nutabdata];
dict2=[unkeyed decodeObjectForKey:@"suisui"];
NSLog(@"Nasrr－－－%@", dic2);
[dict2 addEntriesFromDictionary: @{number:password}];
//归档
NSMutableData *data=[[NSMutableData alloc]init];
NSKeyedArchiver *keyde=[[NSKeyedArchiver alloc]initForWritingWithMutableData:data];
[keyde encodeObject:dict2 forKey:@"suisui"];
[keyde finishEncoding];
[data writeToFile:@"/Users/feifanchengxuyuan/Desktop/qqqq.plist" atomically:YES];
_xinxi.text=@"恭喜，注册成功";
}
}
//取消按钮
- (IBAction)Cancel:(id)sender {
_number.text=@"";
_password.text=@"";
_xinxi.text=@"";
}
//登陆按钮
- (IBAction)Go:(id)sender {
//解档
NSData *nutabdata = [[NSData alloc]initWithContentsOfFile:@"/Users/feifanchengxuyuan/Desktop/qqqq.plist"];
NSKeyedUnarchiver *unkeyed=[[NSKeyedUnarchiver alloc]initForReadingWithData:nutabdata];
dict2=[unkeyed decodeObjectForKey:@"suisui"];
NSLog(@"Nasrr－－－%@" ,dic2);
if ([_password.text isEqual: dict2[_number.text]]) {
_xinxi.text=@"登录成功";
}
else{
_xinxi.text=@"登录失败";
}
}
@end
来源：oschina
链接：https://my.oschina.net/u/2366900/blog/467981