//圖片轉字串

    -(NSString *)UIImageToBase64Str:(UIImage *) image

    {

        NSData *data = UIImageJPEGRepresentation(image, 1.0f);

        NSString *encodedImageStr = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

return encodedImageStr;

    }

//字串轉圖片

    -(UIImage *)Base64StrToUIImage:(NSString *)_encodedImageStr

    {

        NSData *_decodedImageData   = [[NSData alloc] initWithBase64Encoding:_encodedImageStr];

        UIImage *_decodedImage      = [UIImage imageWithData:_decodedImageData];

return _decodedImage;

    }