各种错误

Smart cast to ‘Node’ is impossible, because ‘left’ is a mutable property that could have been changed by this time

编译错误信息如下：

Smart cast to 'Node' is impossible, because 'left' is a mutable property that could have been changed by this time
Smart cast to 'xxxx' is impossible, because 'xxxx' is a property that has open or custom getter

例如下边这行代码

解决方法：1：是使用本地变量。 2：使用safe call 安全调用。 3： Elvis操作符

作者：tommyRen 链接：https://www.jianshu.com/p/6a5f0e95c8a5 来源：简书 著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。