cocoa touch - Touches Began not working with Swift 3.0 on Xcode 8.0 beta -

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i making game swift 3.0 on xcode 8.0 beta. in gamescene have touchbegan function:

override func touchesbegan(_ touches: set<uitouch>, event: uievent?) {     t in touches {         let location = t.location(in: self)         let nodeattouch = self.atpoint(location)         let touchedsprite = nodeattouch as! skspritenode         print("touch detected")         if touchedsprite skbutton {             print("button touched")             touchedsprite.run(skaction.resize(bywidth: 25, height: 25, duration: 0.25))         }     } }

for strange reason print on line 6 doesn't print out when touch screen, therefore meaning touch not being detected. ideas or fixes, else having problem? in advance.


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