add previewBase64Image

src/subpackage/groupon/pages/exchange_success.vue

@@ -4,6 +4,7 @@ import { reactive, ref } from "vue";
 import textLine from "../components/text_line.vue";
 import { getOrder, orderGet } from "../api";
 import { routeTo, showModal } from "@/utils/polish";
+import { previewBase64Image } from "@/utils";
 const orderInfo = ref({});
 onLoad(oprions => {
     getOrderNoFn({ verify_token: oprions?.verify_token ?? '' })
@@ -49,7 +50,7 @@ function copyBtn(){
 
 // 预览核销码
 function previewCode(){
-    uni.previewImage({ urls: [orderInfo.value?.verify_qrcode] })
+    previewBase64Image(orderInfo.value?.verify_qrcode)
 }
 
 function toOrderDetail(){

src/subpackage/order/pages/detail.vue

@@ -10,6 +10,7 @@ import venueInfoAsync from "@/subpackage/groupon/components/venue_info.vue";
 import { orderGet, cancelCheck, orderCancel, getCreateOrderProxyData } from "../api";
 import { get_zh_day } from "@/utils";
 import { showLoad, hideLoad, showNone } from "@/utils/polish";
+import { previewBase64Image } from "@/utils";
 const orderInfo = ref({});
 const cancelModalRef = ref(null);
 // order_type 0场地 1/2次卡
@@ -30,7 +31,7 @@ function getOrderInfo({ brand_id, order_no }){
 }
 
 function previewImg(img){
-    uni.previewImage({ urls: [ img ] });
+    previewBase64Image(img)
 }
 
 function phoneClick(){

src/subpackage/order/pages/enter_code.vue

@@ -2,7 +2,9 @@
 import { onLoad } from '@dcloudio/uni-app';
 import { reactive, ref } from 'vue';
 import server from '@/api/server';
+import { previewBase64Image } from "@/utils";
 const codeInfo = ref({}); // 核销码信息
+
 onLoad(option => {
     server.post({ 
         url: '/stadium/order/session/get' + `/${option?.code_id ?? ''}`, 
@@ -42,7 +44,7 @@ function codeMaskImgPath(status){
 // 预览核销码
 function previewCode(e){
     if(isShowCodeMask(e))return;
-    uni.previewImage({ urls: [e.verify_qrcode] })
+    previewBase64Image(e.verify_qrcode);
 }
 
 </script>

src/utils/index.js

@@ -103,3 +103,34 @@ export function formatDate(timestamp) {
 
   return `${year}-${month}-${day}`;
 }
+
+
+/**
+ * 预览 Base64 图片
+ * @param {string} base64 - base64 图片字符串（可包含 data:image/png;base64, 前缀）
+ */
+export function previewBase64Image(base64) {
+  	const fs = tt.getFileSystemManager();
+	// 去掉前缀，如果有的话
+	const pureBase64 = base64.replace(/^data:image\/\w+;base64,/, '');
+	// 获取用户数据路径（替代 tt.env.USER_DATA_PATH）
+  	const userDataPath = tt.getEnvInfoSync().common.USER_DATA_PATH;
+	// 生成临时文件路径
+	const filePath = `${userDataPath}/preview_${Date.now()}.png`;
+	// 写入临时文件
+	fs.writeFile({
+		filePath,
+		data: pureBase64,
+		encoding: 'base64',
+		success: () => {
+			// 调用预览
+			tt.previewImage({
+				current: filePath,
+				urls: [filePath],
+				success: () => console.log('预览成功'),
+				fail: (err) => console.error('预览失败', err)
+			});
+		},
+		fail: (err) => console.error('写入文件失败', err)
+	});
+}