Swift 4-按下按钮时动作-循环播放？

Question

Hi i want to send a command to a motor at my raspberry while a button is pressed. So for example: While I press the button, the motor should run. It is a stepper motor, so I want long tap and normal tap commands. Normal tap is easy and work, but the long tap (repeatedly commands) doesn't work. I tried it with the long tap gesture recognizer and loops but it doesn't work Here's my code.

@objc func motorLongTap(_ sender: UIGestureRecognizer){        
    while (sender.state == .began) && (sender.state != .ended){
    //send command
    }
}

The loop doesn't stop. Hope somebody can help me. Best Regards

EDIT: Problem solved. Thank you MadProgrammer for your solution

Here is now the code to get a "loop" when action is pressed.

var buttonTimer:Timer!

@objc func motorLongTap(_ sender: UIGestureRecognizer){        
    if sender.state == .ended{
    buttonTimer.invalide()
    }
    else sender.state == .began{
    buttonTimer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(longTapMotor), userInfo: nil, repeats: true)
    }

}
    @objc func longTapMotor() {
        //send command
    }

Answer 1

Your logic is incorrect. Try this:

@objc func motorLongTap(_ sender: UIGestureRecognizer){        
    if sender.state != .ended{
        //send command
    }
}