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fix: infinityscroll bugs for #1149 #1160

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fix: infinityscroll bugs for #1149 #1160

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28 changes: 25 additions & 3 deletions src/mip-infinitescroll/infinitescroll.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

define(function (require) {
// 使用了jquery $.Deferred
var util = require('util');
var $ = require('jquery');
var viewport = require('viewport');
var InfiniteScroll = function (opt) {
Expand All @@ -16,6 +17,7 @@ define(function (require) {

opt.$result = $(opt.$result);
opt.$loading = $(opt.$loading);
opt.$ele = opt.ele;

// 设置默认值
me.options = $.extend({
Expand Down Expand Up @@ -176,15 +178,16 @@ define(function (require) {
var scrollHandler;
viewport.on('scroll', function scrollHandler () {
// 若为暂停状态,什么也不做

if (me.state === 'pause') {
if (me.state === 'pause' || !me._isElementInViewport()) {
return;
}

// 获取当前滚动条位置
me.currentScrollTop = viewport.getScrollTop();
// 某些浏览器(安卓QQ)滚动时会隐藏头部但不触发resize,需要反复获取 wtf...
me.wrapperHeight = viewport.getHeight();
// 获取容器高度
me.scrollerHeight = viewport.getScrollHeight();

// 到顶了
if (me.currentScrollTop <= 0) {
Expand Down Expand Up @@ -261,7 +264,7 @@ define(function (require) {
// trigger scroll事件,确保继续触发数据加载
viewport.trigger('scroll');
}
// 失败
// 失败
}, function () {
// 标记数据状态为请求失败
me.dataStatus = 3;
Expand Down Expand Up @@ -376,6 +379,25 @@ define(function (require) {
);
},

/**
* 判断组件是否在可视区域内
*
* @return {boolean} true 或 false
*/
_isElementInViewport: function () {
var ele = this.options.$ele;
var rect = util.rect.getElementRect(ele);

var winWidth = viewport.getWidth();
var winHeight = viewport.getHeight();
var offRect = util.rect.getElementOffset(ele);
var offLeft = offRect.left;
var offTop = offRect.top;
var offWidth = offRect.width;
var offHeight = offRect.height;

return (offLeft > -offWidth && offLeft < winWidth && offTop > -offHeight && offTop < winHeight)
},
/**
* 获取当前可视区页码的方法(从0计)
*
Expand Down
3 changes: 2 additions & 1 deletion src/mip-infinitescroll/mip-infinitescroll.js
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Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,8 @@ define(function (require) {
limitShowPn: 0,
preLoadPn: 2,
firstResult: [],
pushResult: self.pushResult
pushResult: self.pushResult,
ele: element
});
};

Expand Down