在任何 JavaScript 框架中是否有任何内置函数可以将 keyCodes 转换为字符？其中考虑了 shift 属性，因此它将返回正确的字符。
还是我们只需要构建自己的功能？
问问题
5423 次
2 回答
4
你可以使用String.fromCharCode()
来自MDN：
语法：String.fromCharCode(num1, ..., numN)
参数：num1, ..., numN （Unicode 值的数字序列。）
此方法返回一个字符串而不是 String 对象。
因为 fromCharCode 是 String 的静态方法，所以您始终将其用作 String.fromCharCode()，而不是用作您创建的 String 对象的方法。
更新：
在这里，我做了一个功能，可以做你想做的事：http: //jsbin.com/ukukuq/2/
function keyDownEvent(e) {
var other = {};
var output= {};
output['meta'] = {};
var html = '';
e = (e) ? e : ((event) ? event : null);
if (e) {
output['keyCode'] = (e.keyCode) ? e.keyCode : 'N/A';
output['charCode'] = (e.charCode) ? e.charCode : 'N/A';
output['meta']['shift'] = e.shiftKey ? true : false;
output['meta']['ctrl'] = e.ctrlKey ? true : false;
output['meta']['alt'] = e.altKey ? true : false;
output['meta']['meta'] = e.metaKey ? true : false;
html = document.getElementById('output')
return html.innerHTML += '<pre>keyDown : ' + JSON.stringify(output) + '</pre>';
} else {
return 'error';
}
}
function keyPressEvent(e) {
var other = {};
var output= {};
var html = '';
e = (e) ? e : ((event) ? event : null);
if (e) {
output['keyCode'] = (e.keyCode) ? e.keyCode : 'N/A';
output['charCode'] = (e.charCode) ? e.charCode : 'N/A';
html = document.getElementById('output')
return html.innerHTML += '<pre>keyPress : ' + JSON.stringify(output) + ' Character : <strong>' + String.fromCharCode(output['charCode']) + '</strong></pre><hr/>';
} else {
return 'error';
}
}
var test = document.getElementById('test');
test.onkeydown = keyDownEvent;
test.onkeypress = keyPressEvent;
于 2012-12-21T14:52:44.013 回答
0
我也有自己的功能，我从http://www.cambiaresearch.com/articles/15/javascript-char-codes-key-codes修改了脚本
function convertKeyCode(evt) {
var chara = "";
var keyCode = (evt.which) ? evt.which : evt.keyCode;
var shift = evt.shiftKey;
//if (keyCode == 8)
// chara = "backspace";
// backspace
//if (keyCode == 9)
// chara = "tab";
// tab
//if (keyCode == 13)
// chara = "enter";
// enter
//if (keyCode == 16)
// chara = "shift";
// shift
//if (keyCode == 17)
// chara = "ctrl";
// ctrl
//if (keyCode == 18)
// chara = "alt";
// alt
if (keyCode == 19)
chara = "pause/break";
// pause/break
//if (keyCode == 20)
// chara = "caps lock";
// caps lock
//if (keyCode == 27)
// chara = "escape";
// escape
//if (keyCode == 33)
// chara = "page up";
// page up, to avoid displaying alternate character and confusing people
//if (keyCode == 34)
// chara = "page down";
// page down
//if (keyCode == 35)
// chara = "end";
// end
//if (keyCode == 36)
// chara = "home";
// home
//if (keyCode == 37)
// chara = "left arrow";
// left arrow
//if (keyCode == 38)
// chara = "up arrow";
// up arrow
//if (keyCode == 39)
// chara = "right arrow";
// right arrow
//if (keyCode == 40)
// chara = "down arrow";
// down arrow
//if (keyCode == 45)
// chara = "insert";
// insert
//if (keyCode == 46)
// chara = "delete";
// delete
// Alphanumeric
if (keyCode == 48)
chara = (shift) ? ")" : "0";
if (keyCode == 49)
chara = (shift) ? "!" : "1";
if (keyCode == 50)
chara = (shift) ? "@" : "2";
if (keyCode == 51)
chara = (shift) ? "#" : "3";
if (keyCode == 52)
chara = (shift) ? "$" : "4";
if (keyCode == 53)
chara = (shift) ? "%" : "5";
if (keyCode == 54)
chara = (shift) ? "^" : "6";
if (keyCode == 55)
chara = (shift) ? "&" : "7";
if (keyCode == 56)
chara = (shift) ? "*" : "8";
if (keyCode == 57)
chara = (shift) ? "(" : "9";
if (keyCode == 65)
chara = (shift) ? "A" : "a";
if (keyCode == 66)
chara = (shift) ? "B" : "b";
if (keyCode == 67)
chara = (shift) ? "C" : "c";
if (keyCode == 68)
chara = (shift) ? "D" : "d";
if (keyCode == 69)
chara = (shift) ? "E" : "e";
if (keyCode == 70)
chara = (shift) ? "F" : "f";
if (keyCode == 71)
chara = (shift) ? "G" : "g";
if (keyCode == 72)
chara = (shift) ? "H" : "h";
if (keyCode == 73)
chara = (shift) ? "I" : "i";
if (keyCode == 74)
chara = (shift) ? "J" : "j";
if (keyCode == 75)
chara = (shift) ? "K" : "k";
if (keyCode == 76)
chara = (shift) ? "L" : "l";
if (keyCode == 77)
chara = (shift) ? "M" : "m";
if (keyCode == 78)
chara = (shift) ? "N" : "n";
if (keyCode == 79)
chara = (shift) ? "O" : "o";
if (keyCode == 80)
chara = (shift) ? "P" : "p";
if (keyCode == 81)
chara = (shift) ? "Q" : "q";
if (keyCode == 82)
chara = (shift) ? "R" : "r";
if (keyCode == 83)
chara = (shift) ? "S" : "s";
if (keyCode == 84)
chara = (shift) ? "T" : "t";
if (keyCode == 85)
chara = (shift) ? "U" : "u";
if (keyCode == 86)
chara = (shift) ? "V" : "v";
if (keyCode == 87)
chara = (shift) ? "W" : "w";
if (keyCode == 88)
chara = (shift) ? "X" : "x";
if (keyCode == 89)
chara = (shift) ? "Y" : "y";
if (keyCode == 90)
chara = (shift) ? "Z" : "z";
// Alphanumeric
//if (keyCode == 91)
// chara = "left window";
// left window
//if (keyCode == 92)
// chara = "right window";
// right window
if (keyCode == 93)
chara = "select key";
// select key
//if (keyCode == 96)
// chara = "numpad 0";
// numpad 0
//if (keyCode == 97)
// chara = "numpad 1";
// numpad 1
//if (keyCode == 98)
// chara = "numpad 2";
// numpad 2
//if (keyCode == 99)
// chara = "numpad 3";
// numpad 3
//if (keyCode == 100)
// chara = "numpad 4";
// numpad 4
//if (keyCode == 101)
// chara = "numpad 5";
// numpad 5
//if (keyCode == 102)
// chara = "numpad 6";
// numpad 6
//if (keyCode == 103)
// chara = "numpad 7";
// numpad 7
//if (keyCode == 104)
// chara = "numpad 8";
// numpad 8
//if (keyCode == 105)
// chara = "numpad 9";
// numpad 9
//if (keyCode == 106)
// chara = "multiply";
// multiply
//if (keyCode == 107)
// chara = "add";
// add
//if (keyCode == 109)
// chara = "subtract";
// subtract
//if (keyCode == 110)
// chara = "decimal point";
// decimal point
//if (keyCode == 111)
// chara = "divide";
// divide
//if (keyCode == 112)
// chara = "F1";
// F1
//if (keyCode == 113)
// chara = "F2";
// F2
//if (keyCode == 114)
// chara = "F3";
// F3
//if (keyCode == 115)
// chara = "F4";
// F4
//if (keyCode == 116)
// chara = "F5";
// F5
//if (keyCode == 117)
// chara = "F6";
// F6
//if (keyCode == 118)
// chara = "F7";
// F7
//if (keyCode == 119)
// chara = "F8";
// F8
//if (keyCode == 120)
// chara = "F9";
// F9
//if (keyCode == 121)
// chara = "F10";
// F10
//if (keyCode == 122)
// chara = "F11";
// F11
//if (keyCode == 123)
// chara = "F12";
// F12
//if (keyCode == 144)
// chara = "num lock";
// num lock
//if (keyCode == 145)
// chara = "scroll lock";
// scroll lock
if (keyCode == 186)
chara = ";";
// semi-colon
if (keyCode == 187)
chara = "=";
// equal-sign
if (keyCode == 188)
chara = ",";
// comma
if (keyCode == 189)
chara = "-";
// dash
if (keyCode == 190)
chara = ".";
// period
if (keyCode == 191)
chara = "/";
// forward slash
if (keyCode == 192)
chara = "`";
// grave accent
if (keyCode == 219)
chara = (shift) ? "{" : "[";
// open bracket
if (keyCode == 220)
chara = "\\";
// back slash
if (keyCode == 221)
chara = (shift) ? "}" : "]";
// close bracket
if (keyCode == 222)
chara = "'";
// single quote
return chara;
}
于 2012-12-27T07:58:46.083 回答