Can't remove Gesture - ios

Question

I get two problem by using gestures. First I want remove a gesture called "panRecognizer" on double tap, but it doesn't work. Second Problem I use the panRecognizer to move the view but I can't move to the outer edges it stops 200 or 150 px before I reached the edge from the view.
Here is my code:
self.view.gestureRecognizers = self.pageViewController?.gestureRecognizers
let tap = UITapGestureRecognizer(target: self, action: #selector(miningCatalouge.doubleTapped(_:)))
tap.numberOfTapsRequired = 2
self.view.addGestureRecognizer(tap)
}
func doubleTapped(tap: UITapGestureRecognizer) {
let panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(miningCatalouge.handlePan(_:)))
let curScale = self.view!.layer.valueForKeyPath("transform.scale.x")!.floatValue
if (curScale == 1) {
pageViewController!.view.userInteractionEnabled = false
self.view.transform = CGAffineTransformMakeScale(3, 3)
panRecognizer.minimumNumberOfTouches = 1
panRecognizer.maximumNumberOfTouches = 1
self.view.addGestureRecognizer(panRecognizer)
} else {
self.view.transform = CGAffineTransformMakeScale(1, 1)
self.view.center = CGPointMake(512, 391)
pageViewController!.view.userInteractionEnabled = true
//Don´t removed the gesture "panRecognizer"
self.view.removeGestureRecognizer(panRecognizer)
}
print("doubleTapped")
}
func handlePan(recognizer:UIPanGestureRecognizer) {
let translation = recognizer.translationInView(self.view)
if let view = recognizer.view {
view.center = CGPoint(x:view.center.x + translation.x,
y:view.center.y + translation.y)
}
recognizer.setTranslation(CGPointZero, inView: self.view)
if recognizer.state == UIGestureRecognizerState.Ended {
// 1
let velocity = recognizer.velocityInView(self.view)
let magnitude = sqrt((velocity.x * velocity.x) + (velocity.y * velocity.y))
let slideMultiplier = magnitude / 200
// print("magnitude: \(magnitude), slideMultiplier: \(slideMultiplier)")
// 2
let slideFactor = 0.1 * slideMultiplier //Increase for more of a slide
// 3
var finalPoint = CGPoint(x:recognizer.view!.center.x + (velocity.x * slideFactor),
y:recognizer.view!.center.y + (velocity.y * slideFactor))
// 4
finalPoint.x = min(max(finalPoint.x, 0), self.view.bounds.size.width)
finalPoint.y = min(max(finalPoint.y, 0), self.view.bounds.size.height)
// 5
UIView.animateWithDuration(Double(slideFactor),
delay: 0,
// 6
options: UIViewAnimationOptions.CurveEaseOut,
animations: {recognizer.view!.center = finalPoint },
completion: nil)
}
}

Answer 1

for gesture in view.gestureRecognizers!
{
if let recognizer = gesture as? UITapGestureRecognizer {
view.removeGestureRecognizer(recognizer)
}
}
Hope this code could help

Answer 2

Here is the solution from J.Wang:
class miningCatalouge: UIViewController, UIPageViewControllerDelegate, UIGestureRecognizerDelegate, UIScrollViewDelegate {
// I created a new Variable
var panRecognizer: UIPanGestureRecognizer?
override func viewDidLoad() {
super.viewDidLoad()
self.view.gestureRecognizers = self.pageViewController?.gestureRecognizers
let tap = UITapGestureRecognizer(target: self, action: #selector(miningCatalouge.doubleTapped(_:)))
tap.numberOfTapsRequired = 2
self.view.addGestureRecognizer(tap)
//initialized action to panRecognizer
panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(miningCatalouge.handlePan(_:)))
}
func doubleTapped(tap: UITapGestureRecognizer) {
let curScale = self.view!.layer.valueForKeyPath("transform.scale.x")!.floatValue
if (curScale == 1) {
pageViewController!.view.userInteractionEnabled = false
self.view.transform = CGAffineTransformMakeScale(3, 3)
panRecognizer!.minimumNumberOfTouches = 1
panRecognizer!.maximumNumberOfTouches = 1
self.view.addGestureRecognizer(panRecognizer!)
} else {
self.view.transform = CGAffineTransformMakeScale(1, 1)
self.view.center = CGPointMake(512, 391)
pageViewController!.view.userInteractionEnabled = true
self.view.removeGestureRecognizer(panRecognizer!)
}
print("doubleTapped")
}
func handlePan(recognizer:UIPanGestureRecognizer) {
let translation = recognizer.translationInView(self.view)
if let view = recognizer.view {
view.center = CGPoint(x:view.center.x + translation.x,
y:view.center.y + translation.y)
}
recognizer.setTranslation(CGPointZero, inView: self.view)
if recognizer.state == UIGestureRecognizerState.Ended {
let velocity = recognizer.velocityInView(self.view)
let magnitude = sqrt((velocity.x * velocity.x) + (velocity.y * velocity.y))
let slideMultiplier = magnitude / 200
// print("magnitude: \(magnitude), slideMultiplier: \(slideMultiplier)")
let slideFactor = 0.15 * slideMultiplier //Increase for more of a slide
let finalPoint = CGPoint(x:recognizer.view!.center.x + (velocity.x * slideFactor),
y:recognizer.view!.center.y + (velocity.y * slideFactor))
UIView.animateWithDuration(Double(slideFactor),
delay: 0,
// 6
options: UIViewAnimationOptions.CurveEaseOut,
animations: {recognizer.view!.center = finalPoint },
completion: nil)
}
}