I want to change the sidebar direction using UIView - ios

Question

I currently have a menu (SideBar) that reveals upon swipe and I want the menu to slide from right to left. I changed the swipe direction to match but I'm not sure how to change the SideBar frame or animation. How can I make the SideBar come from the right instead of left?
//
// SideBar.swift
// SideBarMenu
//
// Created by Alexandre on 30/01/2015.
// Copyright (c) 2015 Alexandre. All rights reserved.
//
import UIKit
//Necessary if we want to specify orptional requirements
#objc protocol SideBarDelegate{
func sideBarDidSelectButtonAtIndex(index:Int)
optional func sideBarWillClose()
optional func sideBarWillOpen()
}
//When an item of the sidebar is selected, and also when the sidebar will open or close
class SideBar: NSObject, SideBarTableViewControllerDelegate {
let barWidth:CGFloat = 150.0
let sideBarTableViewTopInset:CGFloat = 64.0
let sideBarContainerView:UIView = UIView()
let sideBarTableViewController:SideBarTableViewController = SideBarTableViewController()
var originView:UIView!
var animator:UIDynamicAnimator!
var delegate:SideBarDelegate!
var isSideBarOpen:Bool = false
//This init only allocate memory
override init(){
super.init()
}
init(sourceView:UIView, menuItems:Array<String>){
super.init()
originView = sourceView
sideBarTableViewController.tableData = menuItems
setupSideBar()
animator = UIDynamicAnimator(referenceView: originView)
let showGestureRecognizer:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
showGestureRecognizer.direction = UISwipeGestureRecognizerDirection.Left
originView.addGestureRecognizer(showGestureRecognizer)
let hideGestureRecognizer:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
hideGestureRecognizer.direction = UISwipeGestureRecognizerDirection.Right
originView.addGestureRecognizer(hideGestureRecognizer)
}
func setupSideBar(){
sideBarContainerView.frame = CGRectMake(-barWidth - 1, originView.frame.origin.y, barWidth, originView.frame.size.height)
sideBarContainerView.backgroundColor = UIColor.clearColor()
sideBarContainerView.clipsToBounds = false
//Add the sideBar to the originView
originView.addSubview(sideBarContainerView)
//blur back of the ground
//let blurView:UIVisualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: UIBlurEffectStyle.Light))
//blurView.frame = sideBarContainerView.bounds
//sideBarContainerView.addSubview(blurView)
//Setup the menu/tableView
sideBarTableViewController.delegate = self
sideBarTableViewController.tableView.frame = sideBarContainerView.bounds
sideBarTableViewController.tableView.clipsToBounds = false
sideBarTableViewController.tableView.separatorStyle = UITableViewCellSeparatorStyle.None
sideBarTableViewController.tableView.backgroundColor = UIColor.clearColor()
sideBarTableViewController.tableView.scrollsToTop = false
sideBarTableViewController.tableView.contentInset = UIEdgeInsetsMake(sideBarTableViewTopInset, 0, 0, 0)
sideBarTableViewController.tableView.reloadData()
sideBarContainerView.addSubview(sideBarTableViewController.tableView)
}
func handleSwipe(recognizer:UISwipeGestureRecognizer){
if recognizer.direction == UISwipeGestureRecognizerDirection.Right {
showSideBar(false)
delegate?.sideBarWillClose?()
} else {
showSideBar(true)
delegate?.sideBarWillOpen?()
}
}
func showSideBar(shouldOpen:Bool){
animator.removeAllBehaviors()
isSideBarOpen = shouldOpen
//The gravity modifies the open and close speed
let gravityX:CGFloat = (shouldOpen) ? 1 : -1
let magnitude:CGFloat = (shouldOpen) ? 20 : -20
let boundaryX:CGFloat = (shouldOpen) ? barWidth : -barWidth - 1
let gravity:UIGravityBehavior = UIGravityBehavior(items: [sideBarContainerView])
gravity.gravityDirection = CGVectorMake(gravityX, 0)
animator.addBehavior(gravity)
let collisionBehavior:UICollisionBehavior = UICollisionBehavior(items: [sideBarContainerView])
collisionBehavior.addBoundaryWithIdentifier("sideBarBoundary", fromPoint: CGPointMake(boundaryX, 20), toPoint: CGPointMake(boundaryX, originView.frame.size.height))
animator.addBehavior(collisionBehavior)
let pushBehavior:UIPushBehavior = UIPushBehavior(items: [sideBarContainerView], mode: UIPushBehaviorMode.Instantaneous)
pushBehavior.magnitude = magnitude
animator.addBehavior(pushBehavior)
let sideBarBehavior:UIDynamicItemBehavior = UIDynamicItemBehavior(items: [sideBarContainerView])
sideBarBehavior.elasticity = -0.3
animator.addBehavior(sideBarBehavior)
}
func sideBarControlDidSelectRow(indexPath: NSIndexPath) {
delegate?.sideBarDidSelectButtonAtIndex(indexPath.row)
}
}

Answer 1

What you want to do is make your starting frame offscreen to the right instead of the left. You'll also need to change the gravity direction.
in setupSideBar, you'll want to change the first line:
sideBarContainerView.frame = CGRectMake(barWidth + 1, originView.frame.origin.y, barWidth, originView.frame.size.height)
// notice the change in the first value (x position)
// the width +1 puts it offscreen +1.
// Previously it was -width-1 which put it to the left
then, in showSideBar:
// just reversing the gravity
let gravityX:CGFloat = (shouldOpen) ? -1 : 1