fix(app): 修复当页面存在多个weiview，返回时子webview取值有误

src/platforms/app-plus/constants.js

@@ -20,3 +20,4 @@ export const INVOKE_API = 'invokeApi'
 export const WEB_INVOKE_APPSERVICE = 'WEB_INVOKE_APPSERVICE'
 export const WEBVIEW_INSERTED = 'webviewInserted'
 export const WEBVIEW_REMOVED = 'webviewRemoved'
+export const WEBVIEW_ID_PREFIX = 'webviewId'

src/platforms/app-plus/service/api/route/navigate-back.js

@@ -3,6 +3,10 @@ import {
   ANI_DURATION
 } from '../../constants'
 
+import {
+  WEBVIEW_ID_PREFIX
+} from '../../../constants'
+
 import {
   setStatusBarStyle
 } from '../../bridge'
@@ -30,7 +34,10 @@ function backWebview (webview, callback) {
   if (!children || !children.length) { // 有子 webview
     return callback()
   }
-  const childWebview = children[0]
+
+  // 如果页面有subNvues，切使用了webview组件，则返回时子webview会取错，因此需要做id匹配
+  const childWebview = children.find(webview => webview.id.indexOf(WEBVIEW_ID_PREFIX) === 0) || children[0]
+  console.log('backWebview -> childWebview', childWebview)
   childWebview.canBack(({
     canBack
   }) => {

src/platforms/app-plus/view/components/web-view/index.vue

@@ -4,7 +4,8 @@
 <script>
 import {
   WEBVIEW_INSERTED,
-  WEBVIEW_REMOVED
+  WEBVIEW_REMOVED,
+  WEBVIEW_ID_PREFIX
 } from '../../../constants'
 
 import { NAVBAR_HEIGHT } from 'uni-helpers/constants'
@@ -92,7 +93,7 @@ export default {
     }
   },
   mounted () {
-    this.htmlId = 'webviewId' + this.$page.id
+    this.htmlId = WEBVIEW_ID_PREFIX + this.$page.id
     insertHTMLWebView({
       htmlId: this.htmlId
     })