我使用虚拟机正常的 真机报错
请问大神是什么原因,需要贴代码吗
闭关修行中......
There is an optional type variable that is nil (nil in Swift has different meanings from nil in OC). Then forcing unwapping will cause this error.
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There is an optional type variable that is nil (nil in Swift has different meanings from nil in OC). Then forcing unwapping will cause this error.