UITextField基本代码_uitextfield 代码-优快云博客

本文链接：https://blog.youkuaiyun.com/gxatwp/article/details/8924064

本文详细介绍了如何在iOS应用中创建并验证密码输入字段，包括设置安全特性、输入限制和反馈机制。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

UITextField *pawdField = [[UITextField alloc]initWithFrame:CGRectMake(160, 150, 230, 40)];
pawdField.placeholder = @"请输入密码";
 pawdField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
 [pawdField setSecureTextEntry:YES];
pawdField.borderStyle = UITextBorderStyleLine;
[pawdField addTarget:self action:@selector(textFieldDidBeginEditing:) forControlEvents:UIControlEventEditingDidBegin];
pawdField.backgroundColor = [UIColor whiteColor];
pawdField.font = [UIFont fontWithName:@"Arial" size:12];
    pawdField.textColor = [UIColor blackColor];
pawdField.clearButtonMode = UITextFieldViewModeWhileEditing;
pawdField.returnKeyType = UIReturnKeyDone;


- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}


/*
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if ([textField.text length] < 5) {
        UIAlertView *alertOne = [[UIAlertView alloc]initWithTitle:@"密码太短" message:@"请重新输入" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alertOne show];
        return NO;
    }
    if ([textField.text length] >= 15) {
        UIAlertView *alertOne = [[UIAlertView alloc]initWithTitle:@"密码太长" message:@"请重新输入" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alertOne show];
        
        return NO;
    }
    return YES;
}
*/


//UITextField编辑时托起
- (void)textFieldDidBeginEditing:(UITextField*)textField{
    if (i == 0) {
        [self viewMoveUp:YES];
        ++i;
    }
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
    if (i == 1) {
        [self viewMoveUp:NO];
        --i;
    }
}
- (void)viewMoveUp:(BOOL)up
{
    const int moveDistance = 150;
    const float moveDuration = 0.3f;
    int moveDis = (up ? -moveDistance : moveDistance);
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:moveDuration];
    self.frame = CGRectOffset(self.frame, 0, moveDis);
    [UIView commitAnimations];
}