代码较老,仅供参考
主要涉及的功能点有:
1、密码输入框要隐藏输入字符,以黑点代替,有时候会在边上设置一个按钮,让用户选择是否需要密文输入
2、Login时会检查输入框,若输入不合法,弹窗提示用户
3、Reset会清空输入
4、点击界面空白地方的时候,能够收起输入键盘,防止挡住用户点击登陆
5、弹出键盘要对输入框适配,来保证输入框不被键盘挡住
1、对于要隐藏输入的文本框,我们只需要把其secureTextEntry的属性设置为TRUE就行了:
self.password.secureTextEntry=TRUE;
2、Login功能会把用户输入保存到AppDelegate中,这样以后程序中需要的时候还可以取到:
-(IBAction)login:(id)sender{
NSString *userName = [self.userName.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSString *password = [self.password.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
if(userName.length==0||password.length==0){
UIAlertView *alert= [[UIAlertView alloc] initWithTitle:@"Input invalid" message:@"UserName or Password is empty" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
return;
}
[delegate.userState setObject:userName forKey:@"KUserName"];
[delegate.userState setObject:password forKey:@"KPassword"];
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
appDelegate.window.rootViewController = appDelegate.tabBar;
}
3、在Reset时,除了清空UI控件中的内容,还需要清空AppDelegate中的内容:
-(IBAction)reset:(id)sender{
self.userName.text=@"";
self.password.text=@"";
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[delegate.userState setObject:@"" forKey:@"KUserName"];
[delegate.userState setObject:@"" forKey:@"KPassword"];
}
所有与UI空间绑定的方法都需要返回类型IBAction