From d2399f76e973cf92d583da93451393c83b186037 Mon Sep 17 00:00:00 2001
From: qiang <guoshengqiang@live.com>
Date: Mon, 14 Oct 2019 15:25:23 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20picker=E3=80=81picker-view=20=E7=BB=84?=
 =?UTF-8?q?=E4=BB=B6=E6=94=AF=E6=8C=81=E9=BC=A0=E6=A0=87=E6=BB=9A=E8=BD=AE?=
 =?UTF-8?q?=E6=93=8D=E4=BD=9C=20fixed=20#846?=
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---
 .../components/picker-view-column/index.vue   | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/core/view/components/picker-view-column/index.vue b/src/core/view/components/picker-view-column/index.vue
index a845998c4..02d4c34a0 100644
--- a/src/core/view/components/picker-view-column/index.vue
+++ b/src/core/view/components/picker-view-column/index.vue
@@ -68,6 +68,7 @@ export default {
     this.indicatorClass = $parent.indicatorClass
     this.maskStyle = $parent.maskStyle
     this.maskClass = $parent.maskClass
+    this.deltaY = 0
   },
   mounted: function () {
     this.touchtrack(this.$refs.main, '_handleTrack', true)
@@ -113,6 +114,18 @@ export default {
         }
       }
     },
+    _handleWheel ($event) {
+      const deltaY = this.deltaY + $event.deltaY
+      if (Math.abs(deltaY) > 10) {
+        this.deltaY = 0
+        var current = Math.min(this.current + (deltaY < 0 ? -1 : 1), this.length - 1)
+        this.current = current = Math.max(current, 0)
+        this._scroller.scrollTo(current * this.indicatorHeight)
+      } else {
+        this.deltaY = deltaY
+      }
+      $event.preventDefault()
+    },
     setCurrent: function (current) {
       if (current !== this.current) {
         this.current = current
@@ -152,7 +165,11 @@ export default {
   },
   render (createElement) {
     this.length = (this.$slots.default && this.$slots.default.length) || 0
-    return createElement('uni-picker-view-column', {}, [
+    return createElement('uni-picker-view-column', {
+      on: {
+        wheel: this._handleWheel
+      }
+    }, [
       createElement('div', {
         ref: 'main',
         staticClass: 'uni-picker-view-group'
-- 
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