feat: App端增加方法 uni.onTabBarMidButtonTap

lib/apis.js

@@ -138,6 +138,7 @@ const ui = [
   'removeTabBarBadge',
   'showTabBarRedDot',
   'hideTabBarRedDot',
+  'onTabBarMidButtonTap',
   'setBackgroundColor',
   'setBackgroundTextStyle',
   'createAnimation',

src/core/runtime/todo.js

@@ -5,6 +5,7 @@ import {
 const todoApis = Object.create(null)
 
 const TODOS = [
+  'onTabBarMidButtonTap',
   'subscribePush',
   'unsubscribePush',
   'onPush',

src/core/service/api/ui/tab-bar.js

 import {
+  onMethod,
   invokeMethod
 } from '../../platform'
 
+import {
+  invoke
+} from 'uni-core/service/bridge'
+
 export function removeTabBarBadge ({
   index
 }) {
@@ -21,3 +26,15 @@ export function showTabBarRedDot ({
 }
 
 export const hideTabBarRedDot = removeTabBarBadge
+
+const callbacks = []
+
+onMethod('onTabBarMidButtonTap', res => {
+  callbacks.forEach(callbackId => {
+    invoke(callbackId, res)
+  })
+})
+
+export function onTabBarMidButtonTap (callbackId) {
+  callbacks.push(callbackId)
+}

src/platforms/app-plus/service/framework/tab-bar.js

@@ -3,6 +3,7 @@ import {
 } from '../api/util'
 
 import {
+  publish,
   requireNativePlugin
 } from '../bridge'
 
@@ -102,6 +103,9 @@ export default {
     tabBar && tabBar.onClick(({ index }) => {
       clickCallback(config.list[index], index, true)
     })
+    tabBar && tabBar.onMidButtonClick(() => {
+      publish('onTabBarMidButtonTap', {})
+    })
   },
   switchTab (page) {
     const itemLength = config.list.length