iOS18报错：View was already initialized

iOS开发报错：View was already initialized

当我们试图对一个自定义的UIView的类进行二次封装时，如果我们外层封装的类也是继承自UIView，当调用外层自定义的UIView时，就会报这个错，记住：外层类一定要继承自NSObject,不会继承自UIView

因为我们里面被封装的类也是继承自UIView