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.