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Ensuring Objective-C class implemented Swift optional protocol method
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| @objc protocol VideoRangeSliderDelegate | |
| { | |
| func videoRange (videoRange:VideoRangeSlider, didChangeLeftPosition:CGFloat, rightPosition:CGFloat) | |
| optional func videoRange(videoRange:VideoRangeSlider, didGestureStateEndedLeftPosition:CGFloat, rightPosition:CGFloat) | |
| } | |
| // Usage ensuring call if method is implemented | |
| delegate?.videoRange?(self, didGestureStateEndedLeftPosition: self.leftPosition, rightPosition: self.rightPosition) |
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