touchend处理程序触发两次 [英] touchend handler fires twice
本文介绍了touchend处理程序触发两次的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在iOS上的webapp上，我有一堆按钮只响应touchend（作为移动游戏中点击延迟的快捷方式）。当我在处理程序中粘贴警报时，即使他们有自己的处理程序，随后点击页面上任何其他按钮也会触发此原始处理程序。以下是一些说明问题的示例代码：
On a webapp on iOS, I have a bunch of buttons that respond only to touchend (as a shortcut to the click delay in mobile safari). When I stick an alert in the handler, then a subsequent tap of any other button on the page fires this original handler even though they have their own handlers. Here's some sample code that illustrates the problem:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=no;" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="default" />
<script type="text/javascript">
function clickAlert(evt) {
alert('btn clicked');
}
function clickData(evt) {
var div;
div = document.getElementById('data');
div.innerHTML += 'btn2 click: ' + (new Date().getTime()) + '<br/>';
}
function loadHandler() {
var btn;
btn = document.getElementById('btn-click-alert');
btn.addEventListener('touchend', clickAlert, false);
btn = document.getElementById('btn-noclick');
btn.addEventListener('touchend', clickData, false);
}
window.addEventListener('load', loadHandler, false);
</script>
</head>
<body>
<button id="btn-click-alert">Click to alert</button>
<button id="btn-noclick">No alert here</button>
<div id="data"> </div>
</body>
</html>
有人可以帮忙吗？
谢谢！
推荐答案
我认为触摸端触发的可视整页警报会干扰触摸事件周期。屈服于DOM后尝试调用警报。例如。
I believe the visual, full-page alert being triggered on touch end is interfering with the touch event cycle. Try to call the alert after yielding to the DOM. eg.
setTimeout(function() {
alert('btn clicked');
}, 0);
这篇关于touchend处理程序触发两次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！
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