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並前往https://teamtreehouse.com/community/nsinvalidargumentexception-reason-uibutton-settext-unrecognized-selector-sent-to-instance-0x7f9553d20db0

UIButton setText:]: unrecognized selector sent to instance ...

'NSInvalidArgumentException', reason: '-[UIButton setText:]: unrecognized selector sent to instance 0x7f9553d20db0'.

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