Null check operator used on a null value

Question

请求数据的时候

Answer 1

提问者 慕雪5906856 2022-04-16 00:53:48

113:52: Error: The argument type 'GridNavModel?' can't be assigned to the parameter type 'GridNavModel' because 'GridNavModel?' is nullable and 'GridNavModel' isn't.

• CrazyCodeBoy #1

  参考下这块课程源码做下空安全适配哈