即觸摸事件下的目的是通過event.target
給出。此外,您應該綁定到touchstart
和touchend
事件。看到這個例子中,我提出:
http://ampersand.no.de/iOSkeyboard.html
的源代碼:
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
<style>
body{
font-family:arial;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-o-user-select: none;
user-select: none;
}
.entry{
border:1px solid green;
color:darkGreen;
margin:25px;
font-size:25px;
font-family:verdana, arial,"sans serif";
padding:10px;
width:500px;
word-wrap:break-word;
}
.wrapper{
height:200px;
position:relative;
margin:25px;
}
.keyboard{
position:absolute;
bottom:0;
}
.key{
border:1px solid darkGray;
display:inline-block;
text-align:center;
cursor:pointer;
margin-top:1px;
border-radius: 4px;
font-family:arial,"sans serif";
width:30px;
height:30px;
line-height:30px;
}
.shift{
width:60px;
margin-left:35px;
}
.spacebar{
width:126px;
}
.backspace{
width:60px;
}
.keypress{
border:1px solid blue;
}
#floatKey{
border-bottom-left-radius:10px;
border-bottom-right-radius:10px;
border-bottom:0px;
border-color:blue;
font-weight:bold;
font-size:24px;
cursor:pointer;
width:40px;
height:40px;
line-height:40px;
background-color:white;
-moz-box-shadow: -5px 0px 5px #ccc;
-webkit-box-shadow: -5px 0px 5px #ccc;
box-shadow: -5px 0px 5px #ccc;
}
.touchStart{
border-color:blue;
border-top:0px;
border-top-left-radius:0px;
border-top-right-radius:0px;
-moz-box-shadow: -5px 5px 5px #ccc;
-webkit-box-shadow: -5px 5px 5px #ccc;
box-shadow: -5px 5px 5px #ccc;
}
</style>
</head>
<body>
<h3>iOS-style keyboard examples</h3>
<div class="entry">|</div>
<div class="wrapper">
<div>With mouse events:</div>
<div class="keyboard" id="mousekb">
<div class="row">
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
<span>6</span>
<span>7</span>
<span>8</span>
<span>9</span>
<span>0</span>
</div>
<div class="row">
<span>q</span>
<span>w</span>
<span>e</span>
<span>r</span>
<span>t</span>
<span>y</span>
<span>u</span>
<span>i</span>
<span>o</span>
<span>p</span>
</div>
<div class="row" style="margin-left:18px">
<span>a</span>
<span>s</span>
<span>d</span>
<span>f</span>
<span>g</span>
<span>h</span>
<span>j</span>
<span>k</span>
<span>l</span>
</div>
<div class="row">
<span>z</span>
<span>x</span>
<span>c</span>
<span>v</span>
<span>b</span>
<span>n</span>
<span>m</span>
<span>,</span>
<span>.</span>
</div>
<div class="row">
<span class="shift">shift</span>
<span class="spacebar"> </span>
<span class="backspace">⇐</span>
</div>
</div>
</div>
<div class="entry">|</div>
<div class="wrapper">
<div>With touch events (zoom in for better view):</div>
<div class="keyboard" id="touchkb">
<div class="row">
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
<span>6</span>
<span>7</span>
<span>8</span>
<span>9</span>
<span>0</span>
</div>
<div class="row">
<span>q</span>
<span>w</span>
<span>e</span>
<span>r</span>
<span>t</span>
<span>y</span>
<span>u</span>
<span>i</span>
<span>o</span>
<span>p</span>
</div>
<div class="row" style="margin-left:18px">
<span>a</span>
<span>s</span>
<span>d</span>
<span>f</span>
<span>g</span>
<span>h</span>
<span>j</span>
<span>k</span>
<span>l</span>
</div>
<div class="row">
<span>z</span>
<span>x</span>
<span>c</span>
<span>v</span>
<span>b</span>
<span>n</span>
<span>m</span>
<span>,</span>
<span>.</span>
</div>
<div class="row">
<span class="shift">shift</span>
<span class="spacebar"> </span>
<span class="backspace">⇐</span>
</div>
</div>
</div>
<div id="floatKey" class="key" style="display:none"></div>
<script>
SHIFT=false;
$('.keyboard span').addClass('key');
function touchStart(ev){
ev.preventDefault();
var o=$(ev.target).offset();
$('#floatKey').html($(ev.target).html())
.show()
.offset({top:(o.top-$('#floatKey').outerHeight()), left:(o.left-5)});
$(ev.target).addClass('touchStart');
}
function touchEnd(ev){
ev.preventDefault();
$('#floatKey').hide();
$(ev.target).removeClass('touchStart');
}
function keyrelease(ev){
ev.preventDefault();
outlineKey(ev.target);
$(ev.target).removeClass('keydown');
$('#floatKey').removeClass('keydown');
var text=$('.entry').eq(0).text();
$('.entry').text(text.substr(0,text.length-1)+$(ev.target).text()+'|');
}
function shiftKey(ev){
ev.preventDefault();
if(SHIFT){
$('.keyboard span').not('.shift').each(function(idx,el){
$(el).text($(el).text().toLowerCase());
})
$(ev.target).removeClass('keypress');
SHIFT=false;
}else{
$('.keyboard span').not('.shift').each(function(idx,el){
$(el).text($(el).text().toUpperCase());
})
$(ev.target).addClass('keypress');
SHIFT=true;
}
}
function outlineKey(el){
$(el).addClass('keypress');
setTimeout(function(){
$(el).removeClass('keypress')
},500);
}
function backspace(ev){
ev.preventDefault();
outlineKey(ev.target);
var text=$('.entry').eq(0).text();
$('.entry').text(text.substr(0,text.length-2)+'|');
}
//mouse keyboard
$('#mousekb span').not('.spacebar,.shift,.backspace').bind('mouseenter',touchStart);
$('#mousekb span').not('.spacebar,.shift,.backspace').bind('mouseout',touchEnd)
$('#mousekb span').not('.shift,.backspace').bind('mouseup',keyrelease)
$('#mousekb .shift').bind('mouseup',shiftKey);
$('#mousekb .backspace').bind('mouseup',backspace);
//touch keyboard:
$('#touchkb span').not('.spacebar,.shift,.backspace').bind('touchstart',touchStart);
$('#touchkb span').not('.spacebar,.shift,.backspace').bind('touchend',touchEnd);
$('#touchkb span').not('.shift,.backspace').bind('touchend',keyrelease)
$('#touchkb .shift').bind('touchend',shiftKey);
$('#touchkb .backspace').bind('touchend',backspace);
</script>
</body>
UPDATE 好吧,我發現了它,並且 '它' 被稱爲document.getElementFromPoint()
。 Mozilla網站上有一些文檔(https://developer.mozilla.org/En/DOM/Document.elementFromPoint)。它會得到給定頂部和左側座標的元素。這可以很容易地用來跟蹤手指當前結束的關鍵。我更新了我的代碼示例以使用這個真棒函數。這裏有一些更新的功能是獲取當前觸摸元素和更新「懸停鍵」:
//functions for touchmove implementation:
function getElAtTouchPosition(ev){
var touch = ev.originalEvent.touches[0] || ev.originalEvent.changedTouches[0] || ev.touches[0];
var top = touch.pageY;
var left = touch.pageX;
var el=document.elementFromPoint(left,top);
if(el.className=='key'){
return el;
}else{
return null;
}
}
function move(ev){
ev.stopImmediatePropagation();
var el=getElAtTouchPosition(ev);
if(el.className=='key' && el!=currentHoverKey){
updateFloatKey(el);
currentHoverKey=el;
}
}
function updateFloatKey(el){
var o=$(el).offset();
$(currentHoverKey).removeClass('touchStart');
$('#floatKey').html($(el).html())
.show()
.offset({top:(o.top-$('#floatKey').outerHeight()), left:(o.left-5)});
$(el).addClass('touchStart');
}
function touchStart2(ev){
ev.preventDefault();
updateFloatKey(ev.target);
currentHoverKey=ev.target;
}
function touchStop2(ev){
$(currentHoverKey).removeClass('touchStart');
$('#floatKey').hide();
}
Check out the example看到這一切是如何被使用。我已經在iPad 2(iOS 4.3)上測試過了,它可以工作。它仍然需要進行一些調整以提高平滑度並解決touchmove結束於非關鍵元素時的情況。我很想看看它如何在Android上運行。我還沒有完成第三個鍵盤的文本輸入代碼,但您可以結合我以前的一些代碼來使其工作。祝你好運。
注:這是極其重要阻止touchmove事件傳播/冒泡DOM樹。如果它傳播,那麼它將變成滾動,並且在iOS設備上滾動時DOM操作被禁用,因此您將無法更新'懸停鍵'。當touchmove事件觸發非關鍵元素時,您需要考慮所有邊緣情況。
「它」(document.getElementFromPoint())正是我沒有找到:)。我希望會有這樣的功能,但無法在任何地方找到它。 – Marcus 2011-05-26 07:08:55
@Marcus,我非常希望看到你最終實現這種類型的鍵盤。如果您的網站是公開的,請發佈鏈接!謝謝。 – ampersand 2011-05-30 06:13:13
它可能需要一段時間纔會公開,但當它發生時,我會嘗試在此處發佈鏈接。感謝您發現document.getElementFromPoint和這個很好的例子。我很確定這些用於移動/觸摸的界面將在未來變得更加流行。 – Marcus 2011-05-30 12:15:17