flutter各种问题

1.用别人的包，无法运行。提示这些：

找到这几个地方，进去修改一下内容。

比如这个文件：

2.提示有未兼容 null safe 的

Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

AndroidStudio->Run->Edit Configurations

添加--no-sound-null-safety

xxx

3.提示这个：

dyld[776]: Library not loaded: @rpath/libswiftCore.dylib

  Referenced from: /private/var/containers/Bundle/Application/5A63DAD7-363A-40D6-BCF4-5F805E233598/Runner.app/Ru