添加图标和组件

miniprogram/pages/components/search-input/search-input.ts

@@ -3,7 +3,10 @@ Component({
   /**
    * 组件的属性列表
    */
-  properties: { label: null },
+  properties: {
+    label: null,
+    placeholder: null,
+  },
 
   /**
    * 组件的初始数据

miniprogram/pages/components/search-input/search-input.wxml

@@ -1 +1,2 @@
-<t-input label="{{label}}" bind:change="onChange" bind:clear="onClear" clearable />
+<t-input label="{{label||''}}" placeholder="{{placeholder || label || '' }}" bind:change="onChange"
+  bind:clear="onClear" clearable />