Swift - Header in UITableView blocks button interaction

Question

In my UITableView I want to have an option to click a button which have a fixed posision (see attached picture). But anything that is in front or behind the UITableView's section headers is blocked from interaction, it does not register the button taps. I've tried to set a higher zPosition, which brings the buttons in front of the headers, but I still can't press the buttons. This is what it lookes like:

Image that shows the buttons before and after

(nameOfButton).layer.zPosition = 99

is applied.

Even though my buttons is in front of the headers, the button taps is not registered...

I'm creating the buttons programatically, and my

viewDidLoad

lookes like this:

override func viewDidLoad() {

        super.viewDidLoad()



        // Allow iOS to resize the cells automatically according to our Auto Layout constraints

        tableView.rowHeight = UITableViewAutomaticDimension



        // We will take ownership of the header view we've so nicely setup in the storyboard and then remove it from the table view.

        headerView = tableView.tableHeaderView

        tableView.tableHeaderView = nil

        tableView.addSubview(headerView)

        let addPhotoTapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.addPhoto(_:)))

        headerView.addGestureRecognizer(addPhotoTapGesture)



        // PhotoPicker

        createPhotoPickerButtons()



        let effectiveHeight = kTableHeaderHeight-kTableHeaderCutAway/2

        tableView.contentInset = UIEdgeInsets(top: effectiveHeight, left: 0, bottom: 0, right: 0)

        tableView.contentOffset = CGPoint(x: 0, y: -effectiveHeight)



        headerMaskLayer = CAShapeLayer()

        headerMaskLayer.fillColor = UIColor.blackColor().CGColor



        headerView.layer.mask = headerMaskLayer

        updateHeaderView()

    }

And my

createPhotoPickerButtons()

(Here I'm placing the buttons below the view so I can animate their appearance with

showImagePicker()

:

func createPhotoPickerButtons() {



        takePhotoButton = UIButton.init(type: UIButtonType.System) // .System

        photoLibraryButton = UIButton.init(type: UIButtonType.System) // .System

        cancelButton = UIButton.init(type: UIButtonType.System) // .System



        takePhotoButton.frame = CGRectMake(20, (0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height), (UIScreen.mainScreen().bounds.width - 40), 40)

        photoLibraryButton.frame = CGRectMake(20, (0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height), (UIScreen.mainScreen().bounds.width - 40), 40)

        cancelButton.frame = CGRectMake(20, (0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height), (UIScreen.mainScreen().bounds.width - 40), 40)



        takePhotoButton.backgroundColor = UIColor(red: 0/255, green: 122/255, blue: 255/255, alpha: 1.0)

        photoLibraryButton.backgroundColor = UIColor(red: 0/255, green: 122/255, blue: 255/255, alpha: 1.0)

        cancelButton.backgroundColor = UIColor(red: 0/255, green: 122/255, blue: 255/255, alpha: 1.0)



        takePhotoButton.setTitle("Take Photo", forState: UIControlState.Normal)

        photoLibraryButton.setTitle("Photo Library", forState: UIControlState.Normal)

        cancelButton.setTitle("Cancel", forState: UIControlState.Normal)



        takePhotoButton.titleLabel?.font = UIFont.systemFontOfSize(17)

        photoLibraryButton.titleLabel?.font = UIFont.systemFontOfSize(17)

        cancelButton.titleLabel?.font = UIFont.systemFontOfSize(17)



        takePhotoButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)

        photoLibraryButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)

        cancelButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)



        let takePhotoButtonTapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.takePhotoButtonAction(_:)))

        takePhotoButton.addGestureRecognizer(takePhotoButtonTapGesture)

        let photoLibraryButtonTapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.photoLibraryButtonAction(_:)))

        photoLibraryButton.addGestureRecognizer(photoLibraryButtonTapGesture)

        let cancelButtonTapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.cancelButtonAction(_:)))

        cancelButton.addGestureRecognizer(cancelButtonTapGesture)



        self.tableView.addSubview(takePhotoButton)

        self.tableView.addSubview(photoLibraryButton)

        self.tableView.addSubview(cancelButton)



        takePhotoButton.layer.zPosition = 99

        photoLibraryButton.layer.zPosition = 99

        cancelButton.layer.zPosition = 99



        takePhotoButton.alpha = 0

        photoLibraryButton.alpha = 0

        cancelButton.alpha = 0



    }

And at last my

showImagePicker()

which is called in

addPhoto()

(the action that is called when the user taps the image):

func showImagePicker(){



        // (0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height - 50 - 10 - 50 - 10 - 50 - 10)



        UIView.animateWithDuration(0.5) {

            self.takePhotoButton.alpha = 1

            self.photoLibraryButton.alpha = 1

            self.cancelButton.alpha = 1



            self.takePhotoButton.frame.origin.y = 0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height - 50 - 10 - 50 - 10 - 50 - 10

            self.photoLibraryButton.frame.origin.y = 0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height - 50 - 10 - 50 - 10

            self.cancelButton.frame.origin.y = 0 + self.tableView.contentOffset.y + UIScreen.mainScreen().bounds.height - 50 - 10

        }

    }

I can't find anything about this on SO, and don't know of another solution for the buttons in the tableView.

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Answer 1

it took me a while to find solution but i figure it out:

sectionView.userInteractionEnabled = false

+

sectionView.layer.zPosition = -1

EDIT: SWIFT 3 UPDATE:

view.isUserInteractionEnabled = false

Swift - Header in UITableView blocks button interaction

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