I sucessfully patched the Swift version to the new Swift 2 syntax. Everything works in principle, but only if I place the picker inside a normal view controller. Once I add a navigation controller, I'm getting error messages:

"Please check the values return by the delegate. The behavior of the UICollectionViewFlowLayout is not defined because: The item height must be less than the height of the UICollectionView minus the section insets top and bottom values."

This happens despite the picker has a size big enough to incorporate all items.

On screen, the problem is that the very last item is positioned below all other items, with an additional spacing to the top. This is why the space is not sufficient for everything. But this only happens when there is a navigation controller active.

Is there a reason why a AKCollectionViewCell is not accessible through any methods?

Hi I want the selected font to be on the very left of the view not the centre. Is this possible?

Hi ! :)
I'm a beginner in swift and my problem is that I don't know what we have to put in "<#frame#>" at the line self.pickerView = AKPickerView(frame: <#frame#>)...
thank you in advance for your answers !

https://github.com/jhonyourangel/AKPickerView-Swift.git

Hi Akkyie!

I think this component is not ready to use with swift 2.0
Someday will be possible?

Thanks!

When using cocoapods, the datasource, delegate and other properties are unavailable.

They are currently internal (i.e. can be accessed only within the AKPickerView module)

They should be set to public to allow access outside of the AKPickerView module

I'm trying to use multiple AKPickerView instances on the same view. Scrolling to selection works fine. But tapping on a cell to select it does not work. Is there a way to get this to work with multiple instances?

@akkyie you have several PRs open for swift 3 support. Would you please consider merging one of them? Swift 2.3 is becoming less and less relevant and so will this excellent library if it's not updated at some point...

On 10.2, wheel perspective is completely absent on simulator and on device. Picker renders completely flat on .wheel mode. Playing around with viewDepth variable doesn't make any difference. Anyone else getting this issue?

Very nice pluggin Akkyie,

I have a request for you, is it possible to set the default positionning to the completly left and not directly at the middle ?

I am trying to change viewcontrollers using pickerview,But the selected item is not highlited while Changing viewcontrollers.This is my code ,Help me

func pickerView(_ pickerView: AKPickerView, didSelectItem item: Int) {
currentScrollIndex = item
print("currentScrollIndexSTEPS(currentScrollIndex)")
if item == 0{
let caloriesVC = self.storyboard?.instantiateViewController(withIdentifier: "CaloriesViewController")as! CaloriesViewController
caloriesVC.modalTransitionStyle = .crossDissolve
present(caloriesVC, animated: true, completion: nil)
}
else if item == 1{
let goalsVC = self.storyboard?.instantiateViewController(withIdentifier: "GoalsViewController")as! GoalsViewController
goalsVC.modalTransitionStyle = .crossDissolve
present(goalsVC, animated: true, completion: nil)
}
else if item == 2{
let oxigenVC = self.storyboard?.instantiateViewController(withIdentifier: "O2ViewController")as! O2ViewController
oxigenVC.modalTransitionStyle = .crossDissolve
present(oxigenVC, animated: true, completion: nil)
}

    preBtn.isHidden = (item == 0) ? true : false
    nextBtn.isHidden = (item == pickerViewItems.count - 1) ? true : false
}

Hi,

I am trying to create few picker on same viewcontroller, now when i try to separate the datasource into another class in never shows the data, be it text or image.

here is the class and the way i am creating the picker.

class imagePickerDataSource : NSObject, AKPickerViewDataSource {
    func numberOfItemsInPickerView(pickerView: AKPickerView) -> Int {
        return imageInputs.count;
    }

    func pickerView(pickerView: AKPickerView, imageForItem item: Int) -> UIImage {
        let image = UIImage(named: imageInputs[item])!;
        return image;
    }
}

Here is how i am calling it.

 let imageDS = imagePickerDataSource();
 self.imageInputPicker.delegate = self;
 self.imageInputPicker.dataSource = imageDS;

The datasource functions are called but picker is never filled with image.

If I'm using the Carthage build I always got the following error message:

Unknown class AKPickerView in Interface Builder file

I tried all solutions which were stated in StackOverflow for this issue but this one seems to be different.

I added the lib file to my project as usual, other frameworks are doing well.

Any idea to solve this issue?

How can i change AKPickerView to scroll vertical direction.

Awesome work by everyone. 👏

Any chance that titles would support fonts, in the near future?

func pickerView(_ pickerView: AKPickerView, didSelectItem item: Int) {
    print("Your favorite font is \(self.fontStyleArray[item])")
    selectedFontStyle = self.fontStyleArray[item]
    pickerView.font = UIFont(name: selectedFontStyle, size: labelFontSize)!
}

This doesn't change the font of the titles!!

Just migrated my project that uses this library to Swift 3.0, it works but I have these warnings:

2016-09-21 12:43:37.621 MyApp[261:22982] the behavior of the UICollectionViewFlowLayout is not defined because:
2016-09-21 12:43:37.622 MyApp[261:22982] the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
2016-09-21 12:43:37.622 MyApp[261:22982] Please check the values return by the delegate.
2016-09-21 12:43:37.624 MyApp[261:22982] The relevant UICollectionViewFlowLayout instance is <_TtC18AKPickerView_SwiftP33_5835361EBAB06A1606BA941DE6A5477B22AKCollectionViewLayout: 0x16ed3e10>, and it is attached to <UICollectionView: 0x170e6000; frame = (0 0; 691 50); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x16d64f20>; layer = <CALayer: 0x16d65240>; contentOffset: {0, 0}; contentSize: {0, 0}> collection view layout: <_TtC18AKPickerView_SwiftP33_5835361EBAB06A1606BA941DE6A5477B22AKCollectionViewLayout: 0x16ed3e10>.
2016-09-21 12:43:37.624 MyApp[261:22982] Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.

Since Cocoapods 0.36 swift is supported. Can you please update your project to support cocoapods with this swift version ?

Thanks.

I would like to set the picker in the middle of his content, as example if i have

["Tokyo", "Kanagawa", "Osaka", "Aichi", "Saitama"]

I would like to show Osaka as the first.

like the method MyPicker.selectRow(row, inComponent: 0, animated: true).

And the way to don't use alpha at the left part of the picker.
I believe was in the attributes.alpha = fabs(currentAngle) < self.maxAngle ? 1.0 : 0.0; , but it didt work when i changed it .

Hello,

Could you please tag a new version so the version on cocoapods uses swift 2.0.

Thanks

We are getting this crash. I just thought I would mention it. Hope this helps.

Thanks for the library! I'm implementing on an app that require VoiceOver support and I'm trying to...

1. Let a VoiceOver user swipe thru the options without accidentally selecting one.
2. Shift focus in the UI after the item has been selected to show related results (this one is more of a VoiceOver question for me at this point but I figured I'd share).

I've already added a new delegate for adding an accessibility label :)

Thanks!

Addendum: I copied this ticket over from the objc version of the library found here akkyie/AKPickerView#78

Did you mean to make the selectedItem field public? The comments suggest as much, and I'm not seeing another way to know which item is selected aside from an AKPickerViewDelegate, and that's overkill for me.

// MARK: Readonly Properties
/// Readonly. Index of currently selected item.

• private(set) var selectedItem: Int = 0

• private(set) public var selectedItem: Int = 0

Would be nice if the delegate method returned an AttributedString instead of just String to allow for some special features like kerning.

I am debugging a memory issue in my app and it appears, initially, that the datasource and delegate meathods in AKPickerView.swift are creating strong references back to my view controller that is causing it not to be de allocated. I changed lines 232 and 234 and 193 from

public var delegate:WHATEVER
to
weak var delegate:WHATEVER

and that cleared up the retain cycle.

I've been confused about when delegates in Swift need to be weak referenced and when they don't. I believe because your protocols are defined with @objc, they specifically need the 'weak' designation, where as if they were pure swift protocols that is not necessary. I could be completely wrong about that though.

Hello there,

I have noticed an issue in your otherwise excellent picker: the last item of the collection is always misaligned (see attached image). This happens both in Wheel and Flat mode.

Furthermore, I keep getting these warnings at runtime:

the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values. Please check the values return by the delegate.

Any suggestions?

Thanks.

In your example on the storyboard your picker view has a custom class assigned as AKPickerView instead of UIPickerView.
I cannot make this assignment when implementing the picker view in my project. How do I do this?

Hey,

Just a small tip i have figured out:
If one of the parent view controllers of AKPickerView has self.automaticallyAdjustsScrollViewInsets = true, It might mess up AKPickerView's collectionView and you will get:

the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values.

error. Beware ! :)

When i build app, it is make 97 error in 'AKPickerView.swift'. I work swift 3
In podfile:
pod "AKPickerView-Swift"
and that success passing in terminal

I'm getting a wrapping error here. I don't think this is an issue however I'm not sure how to safely wrap the frame. Any suggestions?

   let frame = CGRectMake(10, 20, 300, 150)
   let pickerView = AKPickerView(frame : frame)
   //breaks here 
    self.pickerView.delegate = self
    self.pickerView.dataSource = self

Hi,
I've been trying to resize the picker view so that the items are displayed inside the view.

In my storyboard I added a View, 100 x 40, and referenced it to AKPickerView. However when I run the code there is nothing inside the view. When I make the view bigger and run it the items are visible inside the bigger view.
The little rectangle right of 4 is an imageView which seems the lower the last value so that it is not in line with the rest. Is there a way to remove this?

How do I change the code to ensure that the items are displayed in the smaller View?

Hi I want to change the spacing in-between images and have found in your sample that I have to do it in both the storyboard options and the code:
/// Readwrite. A float value which indicates the spacing between cells.
@IBInspectable public var interitemSpacing: CGFloat = 40.0

I don't know if its a mistake or its suppose to be like that. Thought I would tell you anyway.

Hello, I'm using your library in my project and when I walk in this view where the picker view it gives the following error:

06/18/2015 14: 24: 11,480 [8670: 3,022,963] the behavior of the UICollectionViewFlowLayout is not defined because:
06/18/2015 14: 24: 11,480 [8670: 3,022,963] the item height must be less than the height of the UICollectionView minus the insets top section and bottom values.

Can you help me?
Thanks

I used the AKPickerView in my project .

I have Three images ,i want by make default second image at middle ,but i can't do it .Help me

func pickerView(_ pickerView: AKPickerView, didSelectItem item: Int) {
currentScrollIndex = item
preBtn.isHidden = (item == 0) ? true : false
nextBtn.isHidden = (item == pickerViewItems.count - 1) ? true : false
if item == 0{
let caloriesVC = self.storyboard?.instantiateViewController(withIdentifier: "CaloriesViewController")as! CaloriesViewController
caloriesVC.modalTransitionStyle = .crossDissolve
present(caloriesVC, animated: true, completion: nil)
}
else if item == 1{
let goalsVC = self.storyboard?.instantiateViewController(withIdentifier: "GoalsViewController")as! GoalsViewController
goalsVC.modalTransitionStyle = .crossDissolve
present(goalsVC, animated: true, completion: nil)
}
else if item == 2{
let oxigenVC = self.storyboard?.instantiateViewController(withIdentifier: "O2ViewController")as! O2ViewController
oxigenVC.modalTransitionStyle = .crossDissolve
present(oxigenVC, animated: true, completion: nil)
}
}
func pickerView(_ pickerView: AKPickerView, imageForItem item: Int) -> UIImage {
return UIImage(named: "flag_(item)")!.imageWithSize(CGSize(width: 49, height: 49))
}

When calling the selectItem just after calling reloadData, we get a crash "'NSInvalidArgumentException', reason: 'attempt to scroll to invalid index path:".

pickerView.reloadData()
pickerView.selectItem(item)
Need to know what is the best way to call selectItem after the making sure the collection view inside the AKPickerView is loaded.

I got this error when adding pod dependency:
[!] Pods written in Swift can only be integrated as frameworks; this feature is still in beta. Add use_frameworks! to your Podfile or target to opt into using it.

I have an AKPickerView in a UITableView header section, and it won't scroll horizontally. I've tested the implementation outside of a table view subclass and it works fine, so it shouldn't be a problem with the library. Just wondering if this problem should be expected and how to fix it. Thanks!

Hi,

Thanks for your repo.

I need to make it two lines, is there a way ?

Thanks.

Best regards,
Mariam AlJamea.

Upgraded to Swift 3.1 I get warnings: 'M_PI_2' is deprecated: Please use 'Double.pi / 2' or '.pi / 2' to get the value of correct type and avoid casting.

I have solved it with Double.pi / 2 as it says.

Just to solve it to remove the warning.

Hi,

I cannot add the custom class AKPickerView to the UIPickerView in the Storyboard. I think that due to this I keep getting fatal error: unexpectedly found nil while unwrapping an Optional value.
Can you please explain how to do this?

Thanks.

The highlightedFont is set to bold. However, when you select another item the previous item remains bold and the new item's font does not become bold. When the first item is scrolled off the screen it is redrawn and the font is set to the system font rather than the bold font.

It would appear that the issue is with the selected implementation of the AKCollectionViewCell. Changing this from _selected to selected removing the initialisation to false and updating the setting in the cellForRowAtIndexPath fixed the issue for me.

Has anyone else had this issue? Could it be the way I am initialising the picker or is this a genuine issue others have experienced?

If I try to run this in Xcode 7 beta 4, I get 9 compilation errors. Maybe the Swift language framework has changed in the meantime?

Im trying to get the values of the picker when it is scrolling, i believe it was the method scrollViewDidScroll but it never get called.

I like the library a lot, especially the Flat version. I was wondering if there is a way to slow down the speed of the transformations when swiped?

Minimum deployment target is set to 8.1? Is this correct? Can it be set to 8.0 without issue?

I'm unable to build in Xcode 8 using Swift 2.3 on AKPickerView-Swift version 1.0.1