fix(web-view示例): 调整调用uni API方式，使用uni.webView前缀， uni.xxx 改为 uni.webView.xxx

hybrid/html/local.html

@@ -55,29 +55,29 @@
           console.log(action);
           switch (action) {
             case 'switchTab':
-              uni.switchTab({
+              uni.webView.switchTab({
                 url: '/pages/tabBar/API'
               });
               break;
             case 'reLaunch':
-              uni.reLaunch({
+              uni.webView.reLaunch({
                 url: '/pages/tabBar/component'
               });
               break;
             case 'navigateBack':
-              uni.navigateBack({
+              uni.webView.navigateBack({
                 delta: 1
               });
               break;
             case 'getEnv':
-              uni.getEnv((res) => {
+              uni.webView.getEnv((res) => {
                 uni.postMessage({
                   data: res
                 })
               });
               break;
             default:
-              uni[action]({
+              uni.webView[action]({
                 url: '/pages/component/button/button'
               });
               break;
@@ -86,7 +86,7 @@
       })
       // });
       document.querySelector("#postMessage").addEventListener('click', function() {
-        uni.postMessage({
+        uni.webView.postMessage({
           data: {
             action: 'message'
           }