michmich / 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.

xmcirclegesturerecognizer's Issues

Possible to Overlay a Tap Recognizer?

Loving this and it's working great so far! Thank you MichMich!

Just one challenge - I have tried to add a Tap Gesture Recognizer on top but it does not get recognized.

I have also tried to add a Button, and it also does not get recognized.

Any tips on how to workaround either of these?

How can I escape from the recognizer ?

Hi,

First of all, thank you for your work, it works amazingly.
I'm building an app where I'd like to recognize a lot of different gesture (such as tap, tap with multiple fingers, swipes, long press, but without using apple gesture recognizer that are too accurate (That's ironic right ?).

Anyway I'd like to use your class but I've a problem: I can't release the XMCircleRecognizer. So, when I enter in it after some conditions, I can't escape, so I can't recognize another gesture after.

Do you have an Idea how I could handle this problem ? I thought of a kind of :

let rotationRecognizer = self.view.addGestureRecognizer(XMCircleGestureRecognizer(midPoint: self.view.center, target: self, action: #selector(ViewController.rotateGesture(recognizer:))))
rotationRecognizer.enabled = false (or true)

As I'm pretty new to swift, I've no idea how I could do that.

Once again, thanks for you amazing work.

Handling multitouch

Hei.
Just asking... shouldn't you work only with first touch? You're using touches.anyObject() everywhere, but what will happen when user touches with more than one finger?