Flutter混编base64不匹配问题

项目是混编项目
iOS端将图片的NSData base64后传给flutter 。flutter负责显示图片。

iOS端代码

NSData * imgData = UIImageJPEGRepresentation(snapShotImage , 0.0);
///传的就是这个imgBase64Str
NSString * imgBase64Str = [imgData base64EncodedString];

flutter端代码

String imgData = dataMap['imgData']; //发现iOS端的base64有换行(\r\n) 去掉(\r\n)
String noNString = imgData.replaceAll('\r\n', '');
//这个是可以展示的base64数据
  // String imgData =
  //     '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';
print('截屏base64:$noNString');
Uint8List imageBytes = base64.decode(noNString);
//展示
Image.memory(
                    imageBytes!,
                    fit: BoxFit.contain,
                    gaplessPlayback: true, //防止重绘
                  );

带有(\r\n)的base64前半部分截图

/9j/4AAQSkZJRgABAQAA2ADYAAD/4QCMRXhpZgAATU0AKgAAAAgABQESAAMAAAAB

AAEAAAEaAAUAAAABAAAASgEbAAUAAAABAAAAUgEoAAMAAAABAAIAAIdpAAQAAAAB

AAAAWgAAAAAAAADYAAAAAQAAANgAAAABAAOgAQADAAAAAQABAACgAgAEAAAAAQAA

BGWgAwAEAAAAAQAAA7oAAAAA/+0AOFBob3Rvc2hvcCAzLjAAOEJJTQQEAAAAAAAA

OEJJTQQlAAAAAAAQ1B2M2Y8AsgTpgAmY7PhCfv/AABEIA7oEZQMBIgACEQEDEQH/

xAAfAAABBQEBAQEBAQAAAAAAAAAAAQIDBAUGBwgJCgv/xAC1EAACAQMDAgQDBQUE

BAAAAX0BAgMABBEFEiExQQYTUWEHInEUMoGRoQgjQrHBFVLR8CQzYnKCCQoWFxgZ

[参考链接](https://www.cnblogs.com/jieling/articles/13177401.html)

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