From 74a3eea203a600d96760f12505d3b45e31b0fc77 Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@buaa.edu.cn>
Date: Fri, 3 Nov 2017 04:50:58 -0500
Subject: [PATCH] [new feature] Swipe add 'initialSwipe' prop (#279)

* [bugfix] CouponList always show empty info

* [bugfix] add click feedback of buttons in components

* [Doc] add custom theme document

* [new feature] Notice bar support more props

* [bugfix] PullRefresh test cases

* [bugfix] unused NoticeBar style

* [bugfix] Swipe width calc error

* [Doc] english document of all action components

* [Doc] change document site path to /zanui/vant

* [Doc] fix

* [bugfix] uploader style error

* [bugfix] tabs document demo

* [new feature] Cell support vue-router target route

* [bugfix] add cell test cases

* update yarn.lock

* [bugfix] Tabbar cann't display info when use icon slot

* [Doc] update document title

* [bugfix] Dialog should reset button text when showed

* [new feature] CouponList add showCloseButton prop

* [new feature] Swipe add 'initialSwipe' prop
---
 docs/examples-docs/en-US/swipe.md | 1 +
 docs/examples-docs/zh-CN/swipe.md | 3 ++-
 packages/swipe/index.vue          | 8 ++++++--
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/docs/examples-docs/en-US/swipe.md b/docs/examples-docs/en-US/swipe.md
index 57fa76f6d..5c2287909 100644
--- a/docs/examples-docs/en-US/swipe.md
+++ b/docs/examples-docs/en-US/swipe.md
@@ -72,6 +72,7 @@ export default {
 | autoplay | Autoplay interval (ms) | `Number` | - | - |
 | duration | Animation duration (ms) | `Number` | `500` | - |
 | showIndicators | Whether to show indocators | `Boolean` | `true` | - |
+| initialSwipe | Index of initial swipe, start from 0 | `Number` | `0` | - |
 
 ### Event
 
diff --git a/docs/examples-docs/zh-CN/swipe.md b/docs/examples-docs/zh-CN/swipe.md
index 26d014a68..5470707b8 100644
--- a/docs/examples-docs/zh-CN/swipe.md
+++ b/docs/examples-docs/zh-CN/swipe.md
@@ -80,7 +80,7 @@ Vue.component(SwipeItem.name, SwipeItem);
 
 :::demo 图片懒加载
 ```html
-<van-swipe>
+<van-swipe :autoplay="3000">
   <van-swipe-item v-for="(image, index) in images" :key="index">
     <img v-lazy="image" />
   </van-swipe-item>
@@ -108,6 +108,7 @@ export default {
 | autoplay | 自动轮播间隔，单位为 ms | `Number` | - | - |
 | duration | 动画时长，单位为 ms | `Number` | `500` | - |
 | showIndicators | 是否显示指示器 | `Boolean` | `true` | - |
+| initialSwipe | 初始位置，从 0 开始算 | `Number` | `0` | - |
 
 ### 事件
 
diff --git a/packages/swipe/index.vue b/packages/swipe/index.vue
index ca9e427d1..f0af6ec74 100644
--- a/packages/swipe/index.vue
+++ b/packages/swipe/index.vue
@@ -30,6 +30,10 @@ export default {
 
   props: {
     autoplay: Number,
+    initialSwipe: {
+      type: Number,
+      default: 0
+    },
     showIndicators: {
       type: Boolean,
       default: true
@@ -92,9 +96,9 @@ export default {
       // reset offset when children changes
       clearTimeout(this.timer);
       this.width = this.$el.getBoundingClientRect().width;
-      this.active = 0;
+      this.active = this.initialSwipe;
       this.currentDuration = 0;
-      this.offset = this.count > 1 ? -this.width : 0;
+      this.offset = this.count > 1 ? -this.width * (this.active + 1) : 0;
       this.swipes.forEach(swipe => {
         swipe.offset = 0;
       });