我界面用storyboard 的autolayout+sizeclass+纯代码布局，在ios9能很好地显示，用ios7.1的ipad就完全走样了，请问是神马原因
业精于勤，荒于嬉;行成于思，毁于随。
Is it just a pad for ios7.1? Will other versions of ios7.1 work normally? After all, some automatic layout attributes such as margin do not support ios7.
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Is it just a pad for ios7.1? Will other versions of ios7.1 work normally? After all, some automatic layout attributes such as margin do not support ios7.