'#selector' does not refer to an '@objc' method,No method declared with Objective-C selector 'compos
swift3中，添加事件的selector時 action:#selector(「composeBtnClick」)和 action:(「composeBtnClick」)都會出錯web 正確的寫法是 action :#selector(MainViewController.composeBtnClick) 而後在方法composeBtnClick添加swift @objc
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