/*获取本地图片宽度* */getLocalImageWidth(String path){int width;Completer<int> completer = new Completer<int>();Image image = Image.file(File.fromUri(Uri.parse(path)));// 预先获取图片信息image.image.resolve(new ImageConfiguration()).addListener(new ImageStreamListener((ImageInfo info, bool _) {width = info.image.width;print('height===$width');completer.complete(width);}));return completer.future;}/*获取本地图片高度* */getLocalImageHeight(String path){int height;Completer<int> completer = new Completer<int>();Image image = Image.file(File.fromUri(Uri.parse(path)));// 预先获取图片信息image.image.resolve(new ImageConfiguration()).addListener(new ImageStreamListener((ImageInfo info, bool _) {height = info.image.height;print('height===$height');completer.complete(height);}));return completer.future;}
//使用
int originalWidth,originalHeight;
originalWidth =  await Utils().getLocalImageWidth(imagePath);
originalHeight = await Utils().getLocalImageHeight(imagePath);///======
//加载file类型的图片
return Image.file(imageFile,width: 200.w,height: 200.w,fit: BoxFit.fill,frameBuilder: (context, child, frame, wasSynchronouslyLoaded){//加载完成，显示图片if(wasSynchronouslyLoaded){return child;}//加载中，添加透明渐变return AnimatedOpacity(child: child,opacity: frame == null ? 0 : 1,duration: const Duration(seconds: 4),curve: Curves.easeOut,);}),//加载Uint8List类型的图片
return Image.memory(imageUint8List);
//如果得到的图片是base64加密的字符串，将字符串反编译出Uint8List数组后再加载
Image.memory(Base64Decoder().convert(slideImageBase64)));