基于上述答案,这就是我所做的。
var $this = $('elementselector');
var fnmove = function (e) {
e.preventDefault();
e = e.originalEvent;
var touch = e.touches[0] || e.changedTouches[0];
if (!_isInBounds(touch, $this.offset(), $this.outerWidth(), $this.outerHeight())) {
$this.trigger(touch_leave_event);
$this.unbind(touch_move_event, fnmove);
};
};
$this.bind(touch_move_event, fnmove);
-- 入站函数
function _isInBounds(touch, elemposition, width, height) {
var left = elemposition.left,
right = left + width,
top = elemposition.top,
bottom = top + height,
touchX = touch.pageX,
touchY = touch.pageY;
return (touchX > left && touchX < right && touchY > top && touchY < bottom);
};