feat(my-alipay): uni.onKeyboardHeightChange 支持支付宝小程序

src/platforms/mp-alipay/runtime/api/index.js

@@ -4,6 +4,10 @@ import {
   hasOwn
 } from 'uni-shared'
 
+import { $on, $off } from 'uni-core/runtime/event-bus'
+
+let onKeyboardHeightChangeCallback
+
 export {
   setStorageSync,
   getStorageSync,
@@ -104,6 +108,21 @@ export function createIntersectionObserver (component, options) {
   return my.createIntersectionObserver(options)
 }
 
+export function onKeyboardHeightChange (callback) {
+  // 与微信小程序一致仅保留最后一次监听
+  if (onKeyboardHeightChangeCallback) {
+    $off('uni:keyboardHeightChange', onKeyboardHeightChangeCallback)
+  }
+  onKeyboardHeightChangeCallback = callback
+  $on('uni:keyboardHeightChange', onKeyboardHeightChangeCallback)
+}
+
+export function offKeyboardHeightChange () {
+  // 与微信小程序一致移除最后一次监听
+  $off('uni:keyboardHeightChange', onKeyboardHeightChangeCallback)
+  onKeyboardHeightChangeCallback = null
+}
+
 export {
   createMediaQueryObserver
 }

src/platforms/mp-alipay/runtime/wrapper/page-parser.js

@@ -24,6 +24,8 @@ import {
   initSpecialMethods
 } from './util'
 
+import { $emit } from 'uni-core/runtime/event-bus'
+
 const hooks = [
   'onShow',
   'onHide',
@@ -84,6 +86,9 @@ export default function parsePage (vuePageOptions) {
       // 支付宝小程序有些页面事件只能放在events下
       onBack () {
         this.$vm.__call_hook('onBackPress')
+      },
+      onKeyboardHeight (res) {
+        $emit('uni:keyboardHeightChange', res)
       }
     },
     __r: handleRef,