From d90b3379bf945691a66fc90583784ed6270cb029 Mon Sep 17 00:00:00 2001
From: qiang <guoshengqiang@live.com>
Date: Mon, 2 Sep 2019 16:15:26 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20swiper=20=E7=BB=84=E4=BB=B6=E5=A2=9E?=
 =?UTF-8?q?=E5=8A=A0=20transition=20=E4=BA=8B=E4=BB=B6=EF=BC=88H5=EF=BC=89?=
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---
 src/core/view/components/swiper/index.vue | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/core/view/components/swiper/index.vue b/src/core/view/components/swiper/index.vue
index 031596bd..73877395 100644
--- a/src/core/view/components/swiper/index.vue
+++ b/src/core/view/components/swiper/index.vue
@@ -371,6 +371,23 @@ export default {
         slideFrame.style.transform = transform
       }
       this._viewportPosition = index
+      if (!this._transitionStart) {
+        if (index % 1 === 0) {
+          return
+        }
+        this._transitionStart = index
+      }
+      index -= Math.floor(this._transitionStart)
+      if (index <= -(this.items.length - 1)) {
+        index += this.items.length
+      } else if (index >= this.items.length) {
+        index -= this.items.length
+      }
+      index = this._transitionStart % 1 > 0.5 || this._transitionStart < 0 ? index - 1 : index
+      this.$trigger('transition', {}, {
+        dx: this.vertical ? 0 : index * slideFrame.offsetWidth,
+        dy: this.vertical ? index * slideFrame.offsetHeight : 0
+      })
     },
     _animateFrameFuncProto () {
       if (!this._animating) {
@@ -387,6 +404,7 @@ export default {
         this._updateViewport(toPos)
         this._animating = null
         this._requestedAnimation = false
+        this._transitionStart = null
         var item = this.items[this.currentSync]
         if (item) {
           this._itemReady(item, () => {
-- 
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