adamnemecek / xmcirclegesturerecognizer

An one finger circle gesture recognizer in swift.

XMCircleGestureRecognizer

XMCircleGestureRecognizer was written by Michael Teeuw

What is it?

An one finger circle gesture recognizer written in swift.

How to use

Add a XMCircleGestureRecognizer recognizer to your view

let cgr = XMCircleGestureRecognizer(midPoint: self.view.center, innerRadius:10, outerRadius:200, target: self, action: "rotateGesture:"))
view.addGestureRecognizer(cgr)

Or, of you don't need a minimum and maximum distance to your center point:

let cgr = XMCircleGestureRecognizer(midPoint: self.view.center, target: self, action: "rotateGesture:"))
view.addGestureRecognizer(cgr)

Add a gesture responder function to your target to respond to the gesture:

func rotateGesture(recognizer:XMCircleGestureRecognizer)
{
    if let rotation = recognizer.rotation {
        // rotation is the relative rotation for the current gesture in radians
    }
    
    if let angle = recognizer.angle {
        // angle is the absolute angle for the current gesture in radians
    }
    
    if let distance = recognizer.distance {
        // distance is the absolute distance from the midPoint
    }
}

If you like to transform the values from radians to degrees, simply add .degrees to the variable:

if let rotation = recognizer.rotation {
    // rotation.degrees is the relative rotation for the current gesture in degrees
}

So what does it look like?

Disclaimer

This is my fist open source Swift class. So be gentle. ;)

Contributing

Forks, patches and other feedback are welcome.