修改字段名称、增加字数计算

src/pages/demand/demand.vue

@@ -61,10 +61,11 @@
                 <view class="textarea-item">
                     <view class="title-box">
                         <text>需求说明</text>
+                        <text class="desc">您还可以输入{{ maxlength - content.length }}字</text>
                     </view>
                     <view class="textarea-box">
                         <textarea
-                            v-model="explain"
+                            v-model="content"
                             class="textarea"
                             placeholder="请您详细填写需求说明"
                             placeholder-class="placeholder-style-3"
@@ -98,7 +99,7 @@
                             <text>需求说明</text>
                         </view>
                         <view class="textarea-box">
-                            <text class="textarea">{{ explain }}</text>
+                            <text class="textarea">{{ content }}</text>
                         </view>
                     </view>
                     <view class="upload-item">
@@ -199,12 +200,13 @@ export default {
         return {
             customBtn: false,
             pageTitle: "发布需求",
+            maxlength: 300,
             step: 1,
             editPrice: false,
             total: 0,
             // 保存数据
             type: 1,
-            explain: "这个就是需求内容",
+            content: "这个就是需求内容",
             categoryIds: [1, 2, 3],
             uploadImages: [
                 {
@@ -407,6 +409,18 @@ export default {
 }
 .form-container.explain {
     margin-top: 25rpx;
+    .textarea-item {
+        .title-box {
+            width: 100%;
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+        }
+        .desc {
+            font-size: 24rpx;
+            color: #999999;
+        }
+    }
     .textarea-box {
         border: none;
         .textarea {