When you instantiate the SDK, use
ForcePathStyle:true to enable the suffix style. If you make a suffix style request in a URL formatted as
https://cos-ap-beijing.myqcloud.com/<BucketName-APPID>/<Key>, the bucket name
/<BucketName-APPID> will also be added to the signature calculation.
First, obtain the image URL using
cos.getObjectUrl. Then, call
wx.downloadFile to download the image to obtain the temporary path. When the Save Image button appears, click the button to call
wx.saveImageToPhotosAlbum to save the image to your album.