fix(src): 修复segment组件滚动时获取属性报错问题 (#719)

Author: 二一

dist/behaviors/scrollCenter.js

@@ -1,4 +1 @@
-{
-  "component": true,
-  "usingComponents": {}
-}
+{"component":true,"usingComponents":{}}

dist/sticky-item/index.json

@@ -1,5 +1,5 @@
 <view class="l-sticky-item l-class">
-
+  
   <view class="l-sticky-item-header-wrapper l-header-wrapper-class" style="height:{{isFixedTop&&stickyItemWrapperHeight?stickyItemWrapperHeight+'px':'auto'}}"></view>
   <view style="{{mode==='js'?(isFixedTop?'position:fixed;':''):''}} top:{{top}}rpx" class="l-sticky-item-header l-sticky-item-header{{mode==='js'?(isFixedTop?'-fixed l-header-sticky-class':''):(mode==='css'?'-sticky l-header-sticky-class':'')}} l-header-class">
     <slot name="header"></slot>

dist/sticky-item/index.wxml

@@ -1,4 +1 @@
-{
-  "component": true,
-  "usingComponents": {}
-}
+{"component":true,"usingComponents":{}}

dist/sticky/index.json

@@ -12,15 +12,14 @@ export default Behavior({
       });
     },
     queryScrollNode(res, currentIndex, type = 'width') {
+      if(currentIndex<0) return;
       const currentRect = res[currentIndex];
-
       this.getRect('.l-tabsscroll').then(_ => {
+        if(!_) return console.error('找不到元素');
         const scrollWidth = _[type];
-
         let transformDistance = res
           .slice(0, currentIndex)
           .reduce((prev, curr) => prev + curr[type], 0);
-
         transformDistance += (currentRect[type] - scrollWidth) / 2;
 
         if (type === 'width') {

examples/dist/behaviors/scrollCenter.js

@@ -12,15 +12,14 @@ export default Behavior({
       });
     },
     queryScrollNode(res, currentIndex, type = 'width') {
+      if(currentIndex<0) return;
       const currentRect = res[currentIndex];
-
       this.getRect('.l-tabsscroll').then(_ => {
+        if(!_) return console.error('找不到元素');
         const scrollWidth = _[type];
-
         let transformDistance = res
           .slice(0, currentIndex)
           .reduce((prev, curr) => prev + curr[type], 0);
-
         transformDistance += (currentRect[type] - scrollWidth) / 2;
 
         if (type === 'width') {