Call to a member function addEagerConstraints() on null
Call to a member function addEagerConstraints() on null 加上 return 就行了 ...
原文：xcode關閉 overrides a member function but is not marked 'override'
原文地址：https: stackoverflow.com questions xcode how to suppress warning overrides a member function but is not marked You need to turn off the Winconsistent missing overrideflag which automatically gets ...
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