ios - 带有 UIKeyboardType.NumberPad 和非数字文本的 UITextField

Question

我正在使用 TextField 从特定形式的用户号码中获取 xxx-xxx-xx-xx。

我需要向用户显示 NumberPad 键盘并在编辑期间在第 3、6 和第 8 位数字后添加分隔符“-”。

问题是当我指定

TextField.keyboardType = UIKeyboardType.NumberPad

并在我的 textFieldDidChange 方法中添加分隔符，TextField 停止响应添加下一个字符或删除。

更改为 UIKeyboardType.Default 效果很好，但键盘不仅仅是数字。

Answer 1

您好，您可以使用下面的代码。

textField.keyboardType = KeyboardType Number Pad;

- (BOOL)textFieldPhoneDigit:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

@try
{
    NSString *filter = @"(###) - (###) - (####)"; //Change Fileter As Per requirement. 

    if(!filter) return YES; // No filter provided, allow anything

    NSString *changedString = [textField.text stringByReplacingCharactersInRange:range withString:string];

    if(range.length == 1 && // Only do for single deletes
       string.length < range.length &&
       [[textField.text substringWithRange:range] rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"0123456789"]].location == NSNotFound)
    {
        // Something was deleted.  Delete past the previous number
        NSInteger location = changedString.length-1;
        if(location > 0)
        {
            for(; location > 0; location--)
            {
                if(isdigit([changedString characterAtIndex:location]))
                {
                    break;
                }
            }
            changedString = [changedString substringToIndex:location];
        }
    }

    textField.text = filteredPhoneStringFromStringWithFilter(changedString, filter);

    return NO;

}
@catch (NSException *exception) {
    NSLog(@"Exception shouldChange %@",[exception description]);
}