From bc05b18e0c6cbb365366bbf054b78be846942148 Mon Sep 17 00:00:00 2001
From: fxy060608 <fxy060608@gmail.com>
Date: Thu, 18 Jun 2020 18:35:07 +0800
Subject: [PATCH] fix(v3):  backbutton with preload

---
 src/platforms/app-plus/service/framework/app.js | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/platforms/app-plus/service/framework/app.js b/src/platforms/app-plus/service/framework/app.js
index 2e896d8cb..c80a396c4 100644
--- a/src/platforms/app-plus/service/framework/app.js
+++ b/src/platforms/app-plus/service/framework/app.js
@@ -59,10 +59,17 @@ function initGlobalListeners () {
   const globalEvent = requireNativePlugin('globalEvent')
   const emit = UniServiceJSBridge.emit
 
-  // splashclosed 时开始监听 backbutton
-  plus.globalEvent.addEventListener('splashclosed', () => {
+  if (weex.config.preload) {
+    if (process.env.NODE_ENV !== 'production') {
+      console.log('[uni-app] preload.addEventListener.backbutton')
+    }
     plus.key.addEventListener('backbutton', backbuttonListener)
-  })
+  } else {
+    // splashclosed 时开始监听 backbutton
+    plus.globalEvent.addEventListener('splashclosed', () => {
+      plus.key.addEventListener('backbutton', backbuttonListener)
+    })
+  }
 
   plus.globalEvent.addEventListener('pause', () => {
     emit('onAppEnterBackground')
@@ -230,4 +237,4 @@ export function registerApp (appVm) {
   __uniConfig.ready = true
 
   process.env.NODE_ENV !== 'production' && perf('registerApp')
-}
+}
-- 
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