Saving Y position of UIViewSubclass Does not Have member Named Error - ios

Question

Im trying save the position of a UIView subclass that is moved via a pan gesture recogniser and needs to stay in that position
The UIView Subclass MoveSection
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
var panGesture = UIPanGestureRecognizer(target: self, action:Selector("reposition:"))
self.addGestureRecognizer(panGesture)
let yPosition = self.frame.origin.y
}
func reposition(recognizer: UIPanGestureRecognizer) {
let translation = recognizer.translationInView(self)
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)
if recognizer.state == UIGestureRecognizerState.Ended {
//Center view
self.center.x = self.bounds.width/2
}
}
Save position in class
class ViewController
#IBOutlet var reorderSectionOne: MoveSection!
let positionDefaults = NSUserDefaults()
positionDefaults.setObject(NSStringFromCGPoint(self.reorderSectionOne.yPosition), forKey: "pointPositionSectionOne")
positionDefaults.synchronize()
Error: Does not have member named yPosition

Answer 1

You need to move the declaration of yPosition from inside init(coder:) to just inside your UIView subclass. Also, yPosition is a CGFloat, not a CGPoint. So I used a different instance variable, called savedCenter, to save the position as an actual CGPoint. I've refactored your code and implemented the changes below.
class MoveableView: UIView {
var savedYPosition: CGFloat!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let panRecognizer = UIPanGestureRecognizer(target: self, action:"reposition:")
self.addGestureRecognizer(panRecognizer)
self.savedYPosition = CGRectGetMinY(self.frame)
}
func reposition(recognizer: UIPanGestureRecognizer) {
let translation = recognizer.translationInView(self)
if let view = recognizer.view {
view.center = CGPointMake(view.center.x + translation.x, view.center.y + translation.y)
}
recognizer.setTranslation(CGPointZero, inView: self)
if recognizer.state == .Ended {
// center view
self.center.x = CGRectGetWidth(self.bounds) / 2.0
}
}
}
And then you would put the following in your ViewController class
func savePosition() {
let defaults = NSUserDefaults()
defaults.setFloat(Float(self.reorderSectionOne.savedYPosition), forKey: "yPositionSectionOne")
defaults.synchronize()
}
Note that I assumed your UIView subclass was named MoveableView.