ios - Scroll a node in constant distances-SWIFT -

i want know how scroll node in given distance, example 100 px . have done this:

override func touchesended(touches: set<nsobject>, withevent event: uievent) {      fingerisonscroll = false } func roundto(value: int) -> int{     var fractionnum = double(value) / 100.0     let roundednum = int(ceil(fractionnum))     return roundednum * 100 } override func touchesmoved(touches: set<nsobject>, withevent event: uievent) {     if fingerisonscroll{         touch: anyobject in touches {         let touchloc = touch.locationinnode(self)         let prevtouchloc = touch.previouslocationinnode(self)         var jump = touchloc.x - prevtouchloc.x         var myintvalue:int = int(jump)         myintvalue = roundto(myintvalue)          var jumpcgfloat = cgfloat(myintvalue)          simple.position=cgpointmake(simple.position.x + (jumpcgfloat), simple.position.y)         }     } } 

the problem when scroll left moves right , if scroll right doesn't move. thanks.