友盟统计_OBJC_CLASS_$_UMImprintObser

将UMAnalytics.framework拖入项目中出现

Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_UMImprintObserverManager", referenced from: 
objc-class-ref in UMAnalytics(UMComFilterManager.o) 
objc-class-ref in UMAnalytics(UMComReportPolicyManager.o) "_OBJC_CLASS_$_UMTimerManager", 
referenced from: objc-class-ref in

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因为之前项目用过友盟分享，已经添加过UMCommon.framework。因为是之前添加版本比较老。将UMCommon.framework换成最新版本就可解决这个问题！
屏幕快照 2019-02-14 上午9.53.40.png