对scrollerview的约束出现了
Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
Will attempt to recover by breaking constraint 的错误
只需要在scrollerview中设置优先级区别就可以了
