fix: 修复保存网络图片

src/utils/wx_helper.ts

@@ -1,35 +1,48 @@
 import Taro from "@tarojs/taro";
 
 export function saveImage(url) {
-  Taro.getSetting().then(async (res) => {
-    if (!res.authSetting["scope.writePhotosAlbum"]) {
+  // 下载网络图片，返回本地 temp 文件
+  const download = () => {
+    return Taro.downloadFile({ url }).then(res => {
+      if (res.statusCode === 200) {
+        return res.tempFilePath
+      }
+      throw new Error("图片下载失败")
+    })
+  }
+
+  const save = async () => {
+    try {
+      const filePath = await download()
+      await Taro.saveImageToPhotosAlbum({ filePath })
+      Taro.showToast({ title: "保存成功" })
+    } catch (e) {
+      console.error(e)
+      Taro.showToast({ title: "图片保存失败", icon: "none" })
+    }
+  }
+
+  Taro.getSetting().then(res => {
+    const authorized = res.authSetting["scope.writePhotosAlbum"]
+
+    if (!authorized) {
       Taro.authorize({
         scope: "scope.writePhotosAlbum",
-        success: async () => {
-          try {
-            Taro.saveImageToPhotosAlbum({ filePath: url });
-            Taro.showToast({ title: "保存成功" });
-          } catch (e) {
-            Taro.showToast({ title: "图片保存失败", icon: "none" });
-          }
+        success: () => {
+          save()
         },
         fail: () => {
           Taro.showModal({
             title: "提示",
             content: "需要开启相册权限才能保存图片",
             success: (r) => {
-              if (r.confirm) Taro.openSetting();
-            },
-          });
-        },
-      });
+              if (r.confirm) Taro.openSetting()
+            }
+          })
+        }
+      })
     } else {
-      try {
-        Taro.saveImageToPhotosAlbum({ filePath: url });
-        Taro.showToast({ title: "保存成功" });
-      } catch (e) {
-        Taro.showToast({ title: "图片保存失败", icon: "none" });
-      }
+      save()
     }
-  });
-}
+  })
+}