var startX = 0,
startY = 0,
operate = 0;
backDom.addEventListener('touchstart', function(evt) {
evt.preventDefault();
var touch = evt.touches[0], //获取第一个触点
x = Number(touch.pageX), //页面触点X坐标
y = Number(touch.pageY); //页面触点Y坐标
//记录触点初始位置
startX = x;
startY = y;
});
backDom.addEventListener('touchmove', function(evt) {
var touch = evt.touches[0], //获取第一个触点
x = Number(touch.pageX), //页面触点X坐标
y = Number(touch.pageY); //页面触点Y坐标
//判断滑动方向
if (y - startY>0) {
//console.log('下滑了！');
operate = 1;
}
});
backDom.addEventListener('touchend', function() {
if(operate == 1){
inviteDom.style.top = "100%"
inviteLetterBackwardDom.style.bottom = "-100%"
inviteLetterForwardDom.style.bottom = "-100%"
}
});
