优化讲价功能：根据价格范围动态调整价格调整单位和提示阈值

pages/goods-detail/goods-detail.js

@@ -770,23 +770,28 @@ Page({
       }
     }
     
-    const minPrice = middlePrice - 5;
-    const maxPrice = middlePrice + 5;
+    const priceRange = middlePrice < 20 ? 1 : 5;
+    const minPrice = middlePrice - priceRange;
+    const maxPrice = middlePrice + priceRange;
     const defaultPrice = parseFloat(middlePrice.toFixed(2));
+    const priceThreshold = middlePrice < 20 ? 0.1 : 2;
     
     console.log('计算后的价格数据:', {
       middlePrice: middlePrice,
       minPrice: minPrice,
       maxPrice: maxPrice,
-      defaultPrice: defaultPrice
+      defaultPrice: defaultPrice,
+      priceThreshold: priceThreshold
     });
     
     this.setData({
       showBargainModal: true,
       bargainPrice: defaultPrice,
+      basePrice: middlePrice,  // 设置基础价格
       selectedSpecIndex: 0,  // 默认选中第一条规格
       minPrice: minPrice,
       maxPrice: maxPrice,
+      priceThreshold: priceThreshold,  // 设置价格判断阈值
       sliderProgress: 50      // 默认滑块位置
     }, () => {
       console.log('setData 完成后的 bargainPrice:', this.data.bargainPrice);
@@ -827,16 +832,19 @@ Page({
       }
     }
     
-    const minPrice = middlePrice - 5;
-    const maxPrice = middlePrice + 5;
+    const priceRange = middlePrice < 20 ? 1 : 5;
+    const minPrice = middlePrice - priceRange;
+    const maxPrice = middlePrice + priceRange;
     const currentPrice = parseFloat(middlePrice.toFixed(2));
+    const priceThreshold = middlePrice < 20 ? 0.3 : 2;
     
     console.log('选择规格 - 价格数据:', {
       index: index,
       middlePrice: middlePrice,
       minPrice: minPrice,
       maxPrice: maxPrice,
-      currentPrice: currentPrice
+      currentPrice: currentPrice,
+      priceThreshold: priceThreshold
     });
     
     this.setData({
@@ -844,6 +852,8 @@ Page({
       minPrice: minPrice,
       maxPrice: maxPrice,
       bargainPrice: currentPrice,
+      basePrice: middlePrice,  // 更新基础价格
+      priceThreshold: priceThreshold,  // 更新价格判断阈值
       sliderProgress: 50
     });
   },
@@ -871,7 +881,8 @@ Page({
     });
     
     if (bargainPrice > minPrice) {
-      const newPrice = parseFloat((bargainPrice - 1).toFixed(2));
+      const step = bargainPrice < 20 ? 0.1 : 1;
+      const newPrice = parseFloat((bargainPrice - step).toFixed(2));
       console.log('计算新价格:', newPrice);
       this.updatePrice(newPrice);
     }
@@ -887,7 +898,8 @@ Page({
     });
     
     if (bargainPrice < maxPrice) {
-      const newPrice = parseFloat((bargainPrice + 1).toFixed(2));
+      const step = bargainPrice < 20 ? 0.1 : 1;
+      const newPrice = parseFloat((bargainPrice + step).toFixed(2));
       console.log('计算新价格:', newPrice);
       this.updatePrice(newPrice);
     }
@@ -980,7 +992,7 @@ Page({
   // 滑块移动
   onSliderMove(e) {
     try {
-      const { minPrice, maxPrice } = this.data;
+      const { minPrice, maxPrice, bargainPrice } = this.data;
       if (!minPrice || !maxPrice) return;
       
       const touch = e.touches[0];
@@ -996,7 +1008,14 @@ Page({
       progress = Math.max(0, Math.min(100, progress));
       
       const priceRange = maxPrice - minPrice;
-      const price = Math.round(minPrice + (progress / 100) * priceRange);
+      let price = minPrice + (progress / 100) * priceRange;
+      
+      if (bargainPrice < 20) {
+        price = Math.round(price * 10) / 10;
+      } else {
+        price = Math.round(price);
+      }
+      
       const clampedPrice = Math.max(minPrice, Math.min(maxPrice, price));
       
       this.setData({

pages/goods-detail/goods-detail.wxml

@@ -496,6 +496,25 @@
               </view>
               <text class="slider-max-price">¥{{maxPrice}}</text>
             </view>
+            
+            <!-- 立即成交提示 -->
+            <view wx:if="{{bargainPrice > (basePrice + priceThreshold)}}" class="price-reasonable-tip" style="display: flex; align-items: center; justify-content: center; margin-top: 20rpx; padding: 16rpx; background: linear-gradient(135deg, #fefce8 0%, #fef9c3 100%); border-radius: 12rpx; border: 1rpx solid #fde68a;">
+              <text style="font-size: 36rpx; margin-right: 12rpx;">🎊</text>
+              <text style="font-size: 28rpx; color: #d97706; font-weight: 500;">当前出价高于商家报价，可立即成交</text>
+            </view>
+            
+            <!-- 价格建议提示 -->
+            <view wx:elif="{{bargainPrice < (basePrice - priceThreshold)}}" class="price-reasonable-tip" style="display: flex; align-items: center; justify-content: center; margin-top: 20rpx; padding: 16rpx; background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%); border-radius: 12rpx; border: 1rpx solid #bae6fd;">
+              <text style="font-size: 36rpx; margin-right: 12rpx;">😅</text>
+              <text style="font-size: 28rpx; color: #0ea5e9; font-weight: 500;">基于商品的市场价值，成交率低</text>
+            </view>
+            
+            <!-- 价格合理性提示 -->
+            <view wx:else class="price-reasonable-tip" style="display: flex; align-items: center; justify-content: center; margin-top: 20rpx; padding: 16rpx; background: linear-gradient(135deg, #fffbe6 0%, #f7f3d7 100%); border-radius: 12rpx; border: 1rpx solid #ffe7ba;">
+              <text style="font-size: 36rpx; margin-right: 12rpx;">🤲</text>
+              <text style="font-size: 28rpx; color: #d48806; font-weight: 500;">该价格区间合理，预估24h内可成交</text>
+            </view>
+          
           </view>
           
           <!-- 价格输入弹窗 -->