"_OBJC_CLASS_$_UIMainKpiXML", referenced from:错误

今天遇到个错误,挺莫名其妙。

"_OBJC_CLASS_$_UIMainKpiXML", referenced from:

objc-class-ref-to-UIMainKpiXML in MainViewController.o

ld: symbol(s) not found

collect2: ld returned 1 exit status

google了一下,单击报错的类,在右上角的那个窗口,把target栏的对钩点上就OK了。

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