正在跳转至 http://cheng-kang.github.io/2016/03/20/AutoLayout%EF%BC%9Aconstraint%20priority%20%E7%BA%A6%E6%9D%9F%E4%BC%98%E5%85%88%E7%BA%A7%EF%BC%88%E4%B9%9D%E5%AE%AB%E6%A0%BC%E7%BB%AD%EF%BC%8C%E4%B8%80%E4%B8%AA%E6%9B%B4%E4%BC%98%E6%96%B9%E6%A1%88%EF%BC%89/