PNG格式的图片看起来保存成功了，但是打开链接图片不能显示：

图片地址：
1

private func  saveImageFile() {
        if let url = Bundle.main.url(forResource: "1", withExtension: "jpg") {
            let file = LCFile(payload: .fileURL(fileURL: url))
            
            //上传进度监听
            //一般来说，上传文件都会有一个上传进度条显示用以提高用户体验：
            _ = file.save(
                progress: { progress in
                    print(progress)
            },
                completion: { result in
                    switch result {
                    case .success:
                        // handle success
                        print("LCFile upload success")
                        break
                    case .failure(error: let error):
                        // handle error
                        print(error)
                        break
                    }
            })
        }
    }
    
    private func saveImagePngFile() {
        if let url = Bundle.main.url(forResource: "PlayerWalk_0_00", withExtension: "png") {
            let file = LCFile(payload: .fileURL(fileURL: url))
            
            //上传进度监听
            //一般来说，上传文件都会有一个上传进度条显示用以提高用户体验：
            _ = file.save(
                progress: { progress in
                    print(progress)
            },
                completion: { result in
                    switch result {
                    case .success:
                        // handle success
                        print("LCFile upload success")
                        break
                    case .failure(error: let error):
                        // handle error
                        print(error)
                        break
                    }
            })
        }
    }