用户名和密码登陆界面的代码

- (void)viewDidLoad

{

[super viewDidLoad];

//加载窗口的时候把从文件里读出用户名。

NSString *filePath = [self documentsPath:@"user.txt"];

//读出文件存到数组username中

NSArray *username = [NSArray arrayWithContentsOfFile:filePath];

self.TXF1.text = [username objectAtIndex:0];

self.Txtpwd.text = [username objectAtIndex:1];

//文本显示设为安全。星号

self.Txtpwd.secureTextEntry = YES;

}

//登陆验证

- (IBAction)loginpage:(id)sender

{

NSLog(@"login...\n");

NSString *filePath = [self documentsPath:@"user.txt"];

//从user这个文件里读出用户名和密码是否与输入的相同

NSArray *username = [NSArray arrayWithContentsOfFile:filePath];

if([TXF1.text isEqualToString:[username objectAtIndex:0]] && [Txtpwd.text isEqualToString:[username objectAtIndex:1]])

{

//如果验证正确，则重新打开一个窗口

if(self.loginhome ==nil)

{

NSLog(@"loginhome");

loginhome *homepage = [[loginhome alloc]initWithNibName:@"loginhome" bundle:nil];

self.loginhome = [homepage autorelease];

[self.view addSubview:self.loginhome.view];

}

else

{

[self.view addSubview:self.loginhome.view];

}

NSLog(@"登陆成功！\n");

}

else

{

NSLog(@"用户名或密码错误！\n");

judgelogin = [[UIAlertView alloc]initWithTitle:@"提示"

message:@"用户名或密码错误！"

delegate:self

cancelButtonTitle:@"取消"

otherButtonTitles:@"确定",nil];

[judgelogin show];

[judgelogin release];

}

}

//读程序目录而准备

-(NSString *)bundlePath:(NSString *)fileName {

return [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:fileName]; }

-(NSString *)documentsPath:(NSString *)fileName {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

return [documentsDirectory stringByAppendingPathComponent:fileName];

}

-(NSString *)documentsPath {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

return documentsDirectory;

}