atob static method
将Base64编码的字符串解码为原始字符串
base64Str Base64编码的字符串
@example
String decoded = Tools.atob('SGVsbG8gV29ybGQ=');
// 返回: Hello World
Implementation
static String atob(String base64Str) {
try {
List<int> bytes = base64.decode(base64Str);
return utf8.decode(bytes);
} catch (e) {
return '';
}
}