限制输入字段中的字符 [英] Restrict characters in input field
问题描述
当用户在输入字段中输入时,是否有任何选项可以使用此代码而不显示字母或字符?这是我已经尝试的代码,我想保留它但是现在当我在输入中写限制字符时它会显示它们。我需要将输入保持空白
is there any option to use this code without showing the letters or characters when user type in input fields? this is the code i already tried and i want to keep it but now when i write restricted chars in input it show them for a second.I need to keep the input blank
编辑:我不想更改代码,因为这在平板电脑上很有效(其他限制字符函数不会)。唯一的问题是延迟你按限制字符
i dont want to change the code because this work great on tablets (other restrict character functions doesnt) . The only problem is that delay wehn you press restricted chars
代码:
function checkInput(ob){
var invalidChars = /[^0-9]/gi
if(invalidChars.test(ob.value)) {
ob.value = ob.value.replace(invalidChars,"");
}
};
HTML:
<input class="input" maxlength="1" onChange="checkInput(this)" onKeyup="checkInput(this)" type="text" autocomplete="off"/>
推荐答案
你可以试试这个,
$('.input').keyup(function () {
if (!this.value.match(/[0-9]/)) {
this.value = this.value.replace(/[^0-9]/g, '');
}
});
更新:
您可以尝试此代码,
$(document).ready(function() {
$(".input").keydown(function (e) {
// Allow: backspace, delete, tab, escape and enter
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110]) !== -1 ||
// Allow: Ctrl+A
(e.keyCode == 65 && e.ctrlKey === true) ||
// Allow: home, end, left, right
(e.keyCode >= 35 && e.keyCode <= 39)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
});
更新为ANDROID:
<EditText
android:id="@+id/editText1"
android:inputType="number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_marginTop="58dp"
android:layout_toRightOf="@+id/textView1"
android:maxLength="1" >
</EditText>
我认为它可以帮助你...使用 android:inputType =数字
你可以这样做。
I think it may help you... using android:inputType="number"
you can do that.
这篇关于限制输入字段中的字符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!