标签： ios iphone animation uibutton cashapelayer
我正在动画_ = try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers) 。它运行正常，但如何为CAShapeLayer添加CAShapeLayer动画。对UIButton
_ = try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers)
CAShapeLayer
UIButton