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.
今天自定义tableViewCell时遇到一个上面这样的问题，console控制台打印上面的提示！
原因是 ：cell中有一个UIImageView 控件在设置了固定的上下边距的同时 也设定了该控件的宽高度！
我的解决方法：在设置了控件上下边距的时候 不要设置该控件的高度
