The elegant yet functional dropdown menu, written in Swift, appears underneath the navigation bar to display a list of defined items when a user clicks on the navigation title.

This is similar to the issue reported [here].(https://github.com/PhamBaTho/BTNavigationDropdownMenu/issues/127)

Our application, which is a mix of both Swift and Obj C code, has been using this library for quite a while. Our Podfile was using the following format:

pod 'BTNavigationDropdownMenu', :git => 'https://github.com/PhamBaTho/BTNavigationDropdownMenu.git'

With the release of Swift 4.2 this library was updated and we started seeing errors. We're trying to specify a specific version of this library to use, specifically 0.4.1, with the podfile format:

pod 'BTNavigationDropdownMenu', '= 0.4.1'

However, that is giving us the 87 errors referenced in the issue linked at the top of this post. Even when following the guide in the Installation instructions we're seeing errors.

My questions are:

1. Does anyone know the cause of these errors?
2. What is the difference between specifying the pod using the standard pod 'BTNavigationDropdownMenu' format and having it point directly to the repo with the :git => flag?

let menuView = BTNavigationDropdownMenu(title: items.first!, items: items) get error

fatal error: unexpectedly found nil while unwrapping an Optional value

I can't get the drop down menu to work, it keeps crashing as soon as it starts loading. It crashes at the point where it creates the frame in the "init" function. I am using Xcode 6.4 with iOS 8.

Here's my code:

import UIKit
import CVCalendar
import BTNavigationDropdownMenu

class RosterViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate {

@IBOutlet weak var menuButton:UIBarButtonItem!
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var calendarView: CVCalendarView!
@IBOutlet weak var menuView: CVCalendarMenuView!

var menuViewNav: BTNavigationDropdownMenu!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.delegate = self
    tableView.dataSource = self
    tableView.tableFooterView = UIView()

    let items = ["Most Popular", "Latest", "Trending", "Nearest", "Top Picks"]
    menuViewNav = BTNavigationDropdownMenu(title: "Hey", items: items)
    menuViewNav.didSelectItemAtIndexHandler = {(indexPath: Int) -> () in
        print("Did select item at index: \(indexPath)")
    }
    self.navigationItem.titleView = menuViewNav

    if self.revealViewController() != nil {
        menuButton.target = self.revealViewController()
        menuButton.action = "revealToggle:"
        self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
    }
}

Hi,

I have just installed BTNavigationDropdownMenu via CocoaPods. Now when I compile my project I get 83 errors related to BTNavigationDropdownMenu pod.

Is there anything I should change?

Demo project worked fine.

Hi,

i create a function which will create the DropdownMenu. Every time i run this function 2mb of ram will get lost.

if i open a view like in you example close it an reopen it 5-10mb of ram are lost.

hope you understand what i mean.

i think it has something to do with "closures and strong reference cycle", but i didn´t find the error.

Thanks.

Love this library. Been using it for a while now, but after upgrading cocoapods and reinstalling all the pods, I know am hitting a strange error. Nothing else has changed, but this is now the issue I'm seeing:

cell.checkmarkIcon.hidden = (indexPath.row == selectedIndexPath) ? false : true

Running XCode 7.3.1 and the latest BTNavigationDropdownMenu

Any idea why this is happening? It could certainly be me, but I haven't been able to solve it for some time. Thanks!

kane

Hello, is it possible to hide menu when a user taps outside its bounds? If not, could you give me a hint to which view should I add a tapGestureRecognizer?

Thanks in advance

If you have the menu on a secondary page that gets opened on nav, every time you visit it it adds a new child subview to window.

"menuWrapper" is private, so you can't get access to it to force cleanup.

@PhamBaTho Is there a way to close the menu programatically? When I press my rightBarButtonItem with the menu opens, it remains open, I would like to close it in my Action.

Thanks!

I need a button inside my table view to trigger a new index be selected in the dropdown menu, therefore updating the text in the nav bar to match the newly selected index.

Hi,

I migrated to Swift 3 and I got the following error in BTConfiguration.swift: Cannot invoke initializer for type 'CGFloat' with an argument list of type '(CGFloat!)'

I tried to solve it but all my tries didn't work.

Any help?

Thanks.

I wanna change arrow tintClor like below. but crashed at self.menuArrow.tintColor = color

error message is Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value

here is my code

private var menuView: BTNavigationDropdownMenu!

 private func setupDropDownMenu() {
        let items = Artist.allCases.map { $0.rawValue }
        menuView = BTNavigationDropdownMenu(navigationController: self.navigationController, containerView: self.navigationController!.view, title: items.first!, items: items)
        menuView.cellHeight = 45
        menuView.arrowPadding = 15
        menuView.animationDuration = 0.4
        menuView.cellBackgroundColor = .white
        menuView.cellTextLabelColor = .black
        menuView.cellTextLabelFont = UIFont.boldSystemFont(ofSize: 14)
        menuView.shouldKeepSelectedCellColor = true
        menuView.cellTextLabelAlignment = .left
        menuView.cellSelectionColor = .systemGray2
        menuView.checkMarkImage = nil
        //menuView.arrowTintColor = .white
        menuView.didSelectItemAtIndexHandler = { [weak self] index in
            self?.selectedArtist = Artist.allCases[index]
            self?.pagingViewController.reloadData()
        }
        self.navigationItem.titleView = menuView
    }

please help me!

Hi,

the Framework in the current state has a compilation problem with Xcode 12, so I updated the project settings to the recommendations by Xcode and also let Xcode migrate to Swift 5, which needs no extra code adjustments.

Hi I have a problem with a function "setSelected" I have a menu with 4 items. 4 Item is "Choose one for me" and the first is "Movie". When I tap on "Choose one for me" this call a function and in this function there is "menuDropDown.setSelected(index: 0)". I get the problem like the images attached. The arrow is not near "Movie"

Hey, Tho. So, I wanted to use Apple's Symbols (as images) in my cells, so switched to using NSAttributedStrings with NSTextAttachments, for each UITableViewCell.

In this PR, I added support for an optional NSAttributedString to set the cell's attributedText instead. items are now an array of type BTItem, which is a struct I created with a String and an optional NSAttributedString. If a NSAttributedString is set for an item, it will use that instead.

I don't know if would be popular or not, since it is a breaking change with the previous array of Strings, for items, but otherwise it works the same. One would just pass in BTItem(string: "Text"), instead of "Text" for each element.

-Stu