flx：考试培训下载预览增加下载中提示

manifest.json

@@ -3,7 +3,7 @@
     "appid" : "__UNI__4AA4101",
     "description" : "",
     "versionName" : "1.6.7",
-    "versionCode" : 166,
+    "versionCode" : 167,
     "transformPx" : false,
     /* 5+App特有相关 */
     "app-plus" : {

pages/personLocation/exam/studydetails/studydetails.vue

@@ -126,6 +126,10 @@
 				let that = this;
 				let url = val.url
 				console.log(val)
+				uni.showLoading({
+					icon: 'loading',
+					title: '下载中...'
+				});
 				uni.downloadFile({
 					url: url,
 					success: function(res) {
@@ -166,6 +170,7 @@
 								filePath: filePath,
 								success: function(res) {
 									console.log('打开文档成功');
+									uni.hideLoading();
 									that.dataList[index].isFileOver = true;
 									console.log(that.dataList);
 								}