Why am I getting a breakpoint 2.5 on my outlet named scrollPages? I'm using it to make let the user scroll up and down but for some reason I'm getting breakpoint 2.5.
I didn't get the breakpoint before when I tried the app, then I added a feature that didn't work then I it and now when I removed the feature I still get it.
Here is my code and the outlet that gives me the breakpoint has a --> next to it. Thanks!
// ViewController.swift
import UIKit
class ViewController: UIViewController, UIApplicationDelegate {
--> #IBOutlet weak var scrollPages: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let V1 : View1 = View1(nibName: "View1", bundle: nil)
let V2 : View1 = View1(nibName: "View2", bundle: nil)
self.addChildViewController(V1)
self.scrollPages.addSubview(V1.view)
V1.didMove(toParentViewController: self)
self.addChildViewController(V2)
self.scrollPages.addSubview(V2.view)
V1.didMove(toParentViewController: self)
var V2Frame : CGRect = V2.view.frame
V2Frame.origin.y = self.view.frame.height
V2.view.frame = V2Frame
self.scrollPages.contentSize = CGSize(width: self.view.frame.width,
height: self.view.frame.height * 2)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Related
I have watched this tutorial
Snapchat Like Layout using View Controller Theme
then I embed one of the three controllers in Navigation Controller but it didn't work then i have tried to add it on the view controller how had the scroll view also didn't work + gives me overlap I didn't tried it in code tho but I don't think this is the cause , this is the code
class ViewController: UIViewController {
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
let V1 = self.storyboard?.instantiateViewController(withIdentifier: "V1") as UIViewController!
self.addChildViewController(V1!)
self.scrollView.addSubview((V1?.view)!)
V1?.didMove(toParentViewController: self)
V1?.view.frame = scrollView.bounds
let V2 = self.storyboard?.instantiateViewController(withIdentifier: "V2") as UIViewController!
self.addChildViewController(V2!)
self.scrollView.addSubview((V2?.view)!)
V2?.didMove(toParentViewController: self)
V2?.view.frame = scrollView.bounds
var V2Frame: CGRect = V2!.view.frame
V2Frame.origin.x = self.view.frame.width
V2?.view.frame = V2Frame
let V3 = self.storyboard?.instantiateViewController(withIdentifier: "V3") as UIViewController!
self.addChildViewController(V3!)
self.scrollView.addSubview((V3?.view)!)
V3?.didMove(toParentViewController: self)
V3?.view.frame = scrollView.bounds
var V3Frame: CGRect = V3!.view.frame
V3Frame.origin.x = 2 * self.view.frame.width
V3?.view.frame = V3Frame
self.scrollView.contentSize = CGSize(width: self.view.frame.width * 3, height: self.view.frame.height)
self.scrollView.contentOffset = CGPoint(x: self.view.frame.width * 1 , y: self.view.frame.height)
}
how the code works ??
1- first I have added scroll view to a view controller
2- then inside the scroll view I have added 3 view controller and all the 3 controllers has own class like normal view controllers
3- the scroll View added the 3 controllers on its view by this code on the top
all the 3 controllers inheriting from own class and everything is wor fine
if anyone can help or need more description just ask
try below
Create ViewController in Storyboard or XIB and add ScrollView and PageControl
My Class as below:
class ScrollContentViewController: UIViewController, UIScrollViewDelegate {
#IBOutlet weak var pageControl: UIPageControl!
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.pageControl.currentPage = 0
self.pageControl.numberOfPages = 4
var originX = CGFloat(0)
let width = scrollView.frame.size.width
let height = scrollView.bounds.size.height
for x in 0 ..< 4 {
let V1 = UIViewController()
self.scrollView.addSubview(V1.view)
V1.view.frame = CGRect(x: originX, y: 0, width: width, height: height)
V1.view.backgroundColor = x % 2 == 0 ? UIColor.lightGray : UIColor.darkGray
self.addChildViewController(V1)
originX += width
}
self.scrollView.contentSize = CGSize(width: originX, height: height)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let x = Int(scrollView.contentOffset.x / scrollView.frame.size.width)
self.pageControl.currentPage = x
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
I'm working on an iPad app that should display 4 CollectionViews next to each other. The height of the collection views should be 3/4 of the screen, so the layout will look something like this:
___________________
| top content |
|-------------------|
| CV | CV | CV | CV |
|____|____|____|____|
I tried to narrow everything down and created a new project with just one of these collection views, but I keep running into the same problem: when I tap on one of the cells, all of them disappear. To reproduce:
create a new project with template "Single View Application" using Swift as language
setup the storyboard:
drag a new Collection View Controller in the storyboard
set the storyboard ID to "CollectionViewController"
for the cell: set identifier to MyCollectionViewCell, drag a label in the cell, set constraints
create files with the following source code:
CollectionViewCell.swift: (create the outlet by ctrl-dragging the label to the source code)
import UIKit
class CollectionViewCell: UICollectionViewCell {
#IBOutlet weak var label: UILabel!
}
CollectionViewController.swift: (pay attention to the comment in viewDidLoad implementation)
import UIKit
private let reuseIdentifier = "MyCollectionViewCell"
class CollectionViewController: UICollectionViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Register cell classes
// this has to be removed to work with a custom cell class
// self.collectionView!.register(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: UICollectionViewDataSource
override func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! CollectionViewCell
cell.label.text = "\(indexPath.section)-\(indexPath.row)"
return cell
}
}
change the implementation for ViewController.swift:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let frame = view.frame
let vc = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "CollectionViewController")
vc.view.frame = CGRect(x: 0.0, y: frame.size.height * 0.25, width: frame.size.width, height: frame.size.height * 0.75)
self.view.addSubview(vc.view)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Here's a capture of the iOS simulator:
https://youtu.be/VVBsTnYLGM4
I hope I didn't forget anything to reproduce the problem. Just in case, I uploaded the project to my dropbox.
https://dl.dropboxusercontent.com/u/607872/CollectionViewBugZip.zip
Can someone tell me what I'm doing wrong?
Turns out the mistake was in adding the collection view as a subview, which isn't considered good practice. Appearently, when only the subview is added, it's "disconnected" from its view controller.
This did the trick:
ViewController.swift
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let frame = view.frame
let vc = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "CollectionViewController")
self.addChildViewController(vc) // <----------- !!!!
vc.didMove(toParentViewController: self) // <-- !!!!
vc.view.frame = CGRect(x: 0.0, y: frame.size.height * 0.25, width: frame.size.width, height: frame.size.height * 0.75)
self.view.addSubview(vc.view)
}
Check that your ViewController not deiniting. Write deinit { print("Deinited") } and place a breakpoint there. In my case CollectionView disappeared because it was been deiniting with viewController that holt it.
Swift 5 / iOS 16
Adding the following two lines, right below where I programmatically instantiate the UIViewController that hosts the UICollectionView worked for me).
I don't know why it works, but I was completely out of ideas and found this on reddit, and it solved it after a couple of hours of me sweating and trying everything I could think of:
self.addChild(vcThatHostsCollectionView)
vcThatHostsCollectionView(toParent: self)
This is the code in my 'consumer' viewcontroller that instantiates the collection view hosting viewcontroller, that includes the two lines shown above.
func configurePagerTabs() {
let rect = CGRectMake(0, 0, UIScreen.main.bounds.width, 35.0)
let pagerTabsViewController = PagerTabsViewController(frame: rect, tabTitles: tabTitles)
self.addChild(pagerTabsViewController)
pagerTabsViewController.didMove(toParent: self)
pagerTabsViewController.delegate = self
pagerTabsView = pagerTabsViewController.view
view.addSubview(pagerTabsView)
}
This is part of the viewcontroller that creates the collection view, to show how it initializes things.
class PagerTabsViewController: UIViewController {
enum Section { case main }
var dataSource : UICollectionViewDiffableDataSource<Section, String>! = nil
var collectionView : UICollectionView! = nil
var tabTitles : [String]! = nil
var delegate : PagerTabsDelegate? = nil
var reuseId = "TabCellReuse"
var frame = CGRect.zero
required init(coder: NSCoder) { fatalError("Not implemented to use with storyboard") }
#objc init(frame: CGRect, tabTitles: [String]) {
super.init(nibName: nil, bundle: nil)
self.tabTitles = tabTitles
self.frame = frame
}
override func loadView() {
collectionView = UICollectionView(frame: frame, collectionViewLayout: createLayout())
collectionView.isPagingEnabled = true
collectionView.delegate = self
collectionView.dataSource = self
collectionView.backgroundColor = .blue
registerCells()
view = collectionView
}
.
.
.
}
I have a question to use UITableView in xib file attaching to UIScrollView with checked paging enabled.
I am not native speaker in english, so please see this carefully.
import UIKit
class ViewController: UIViewController, UIScrollViewDelegate {
#IBOutlet var menuScrollView: UIScrollView!
#IBOutlet var pageScrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let V1: View1 = View1(nibName: "View1", bundle: nil)
let V2: View2 = View2(nibName: "View2", bundle: nil)
self.addChildViewController(V1)
self.pageScrollView.addSubview(V1.view)
V1.didMoveToParentViewController(self)
self.addChildViewController(V2)
self.pageScrollView.addSubview(V2.view)
V2.didMoveToParentViewController(self)
var V2Frame: CGRect = V2.view.frame
V2Frame.origin.x = self.view.frame.width
V2.view.frame = V2Frame
print("view width:",self.view.frame.width, "v2 origin x:",V2.view.frame.origin.x)
self.pageScrollView.contentSize = CGSizeMake(self.view.frame.width * 2, self.pageScrollView.frame.height)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
The first page shows the little bit of second page but I coded ,as shown as above code,
V2Frame.origin.x = self.view.frame.width
I thought this would work to fit width of the view but it doesn't.
I want the View1 and View2 to fit the UIScrollView.
I really appreciate to give me a help.
I copied this code for the sliding view controller from a YouTube snapchat like menu video but it won't compile.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var V1 : View1 = View1(nibName: "View1" , bundle: nil)
self.addChildViewController(V1)
self.scrollView.addSubview(V1.view)
V1.didMoveToParentViewController(self)
}
I keep getting the error use of undeclared type 'View1'. How do I fix this? I followed a tutorial and the code is identical. How do I declare View1 as a type?
I've made the same tutorial but for three Views:
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let view1: View1 = View1(nibName: "View1", bundle: nil)
addChildViewController(view1)
scrollView.addSubview(view1.view)
view1.didMoveToParentViewController(self)
let view2: View2 = View2(nibName: "View2", bundle: nil)
addChildViewController(view2)
scrollView.addSubview(view2.view)
view2.didMoveToParentViewController(self)
var view2Frame: CGRect = view2.view.frame
view2Frame.origin.x = view.frame.width
view2.view.frame = view2Frame
let view3: View3 = View3(nibName: "View3", bundle: nil)
addChildViewController(view3)
scrollView.addSubview(view3.view)
view3.didMoveToParentViewController(self)
var view3Frame: CGRect = view3.view.frame
view3Frame.origin.x = view.frame.width * 2
view3.view.frame = view3Frame
self.scrollView.contentSize.width = view.frame.width * 3
}
And this works just fine. Hope it helps.
I am trying to create a custom UIView and display it as a pop up in my main View using Swift.
My Custom UIView code is
class DatePopUpView: UIView {
var uiView:UIView?
override init() {
super.init()
self.uiView = NSBundle.mainBundle().loadNibNamed("DatePopUpView", owner: self, options: nil)[0] as? UIView
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
required override init(frame: CGRect) {
super.init(frame: frame)
}
}
And I am Calling it in my main view as:
#IBAction func date_button_pressed (sender : AnyObject?) {
var popUpView = DatePopUpView()
var centre : CGPoint = CGPoint(x: self.view.center.x, y: self.view.center.y)
popUpView.center = centre
popUpView.layer.cornerRadius = 10.0
let trans = CGAffineTransformScale(popUpView.transform, 0.01, 0.01)
popUpView.transform = trans
self.view .addSubview(popUpView)
UIView .animateWithDuration(0.5, delay: 0.0, options: UIViewAnimationOptions.CurveEaseInOut, animations: {
popUpView.transform = CGAffineTransformScale(popUpView.transform, 100.0, 100.0)
}, completion: {
(value: Bool) in
})
}
But popUp is not Coming. I used breakpoint and noticed that value is getting assigned to my popUpView but still it is not displayed on my main View. Please Help
Please Note: I am using StoryBoard for my mainView and custom View i have made using xib.
Without additional description on what you are attempting to do, may I suggest something like the code below? Basically, you can use .hidden feature of a view (or any other control) to show/hide the view. You can set the size and positioning of the view to be popped by using the layout editor.
import UIKit
class ViewController: UIViewController {
var popped = false
var popupBtnTitle = "Show Popup"
#IBAction func popupButton(sender: UIButton) {
popped = !popped
anotherView.hidden = !popped
popupBtnTitle = popped ? "Hide Popup" : "Show Popup"
popupButtonOutlet.setTitle(popupBtnTitle, forState: UIControlState.Normal)
}
#IBOutlet weak var popupButtonOutlet: UIButton!
#IBOutlet weak var anotherView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
popped = false
anotherView.hidden = !popped
popupButtonOutlet.setTitle(popupBtnTitle, forState: UIControlState.Normal)
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}