微信公众号网页长按屏蔽默认点击事件后再添加其他事件

window.ontouchstart = function(e) { 
e.preventDefault();
};
$.fn.longPress = function(fn) {
var timeout = undefined;
var $this = this;
for(var i = 0;i<$this.length;i++){
$this[i].addEventListener('touchstart', function(event) {
  timeout = setTimeout(fn, 800);
}, false);
$this[i].addEventListener('touchend', function(event) {
  clearTimeout(timeout);
}, false);
}
}
$('#div').longPress(function(){
alert(1);
});