JNDropDownMenu

Overview

Swift version of https://github.com/dopcn/DOPDropDownMenu

Easy to use TableView style dropdown menu.

Setup

The only thing you need to do is import JNDropDownMenu, create an instance and add it to your View and conform to its datasource and delegate.

import JNDropDownMenu

// pass origin of menu, height - this will be height of collapsed menu not the expanded menu, width - it is optional, pass custom width or pass nil to utilize screen width
let menu = JNDropDownMenu(origin: CGPoint(x: 0, y: 64), height: 40, width: self.view.frame.size.width)
        menu.datasource = self
        menu.delegate = self
        self.view.addSubview(menu)

Just implement datasource and delegate same as that of Tableview

extension ViewController: JNDropDownMenuDelegate, JNDropDownMenuDataSource {
    func numberOfColumns(in menu: JNDropDownMenu) -> NSInteger {
        return 2
    }
    
    func numberOfRows(in column: NSInteger, for forMenu: JNDropDownMenu) -> Int {
        switch column {
        case 0:
            return columnOneArray.count
        case 1:
            return columnTwoArray.count
        default:
            return 0
        }
    }
    
    func titleForRow(at indexPath: JNIndexPath, for forMenu: JNDropDownMenu) -> String {
        switch indexPath.column {
        case 0:
            return columnOneArray[indexPath.row]
        case 1:
            return columnTwoArray[indexPath.row]
            
        default:
            return ""
        }
    }
    
    func didSelectRow(at indexPath: JNIndexPath, for forMenu: JNDropDownMenu) {
        var str = ""
        switch indexPath.column {
        case 0:
            str = columnOneArray[indexPath.row]
            break
        case 1:
            str = columnTwoArray[indexPath.row]
            break
        default:
            str = ""
        }
        label.text = str + " selected"
    }
}

Customization

There are very minimal customization available currently. You can alter color and font before setting menu datasource as follow:

    let menu = JNDropDownMenu(origin: CGPoint(x: 0, y: 64), height: 40, width: self.view.frame.size.width)
    //customize
    menu.textColor = UIColor.red
    menu.cellBgColor = UIColor.green
    menu.arrowColor = UIColor.black
    menu.cellSelectionColor = UIColor.white
    menu.textFont = UIFont.boldSystemFont(ofSize: 15.0)
    menu.updateColumnTitleOnSelection = false // Override titleFor(column: Int, menu: JNDropDownMenu) if you are setting this to false
    menu.arrowPostion = .Left

    menu.datasource = self
    menu.delegate = self
    self.view.addSubview(menu)

Find the above displayed examples in the Example folder.

Installation

CocoaPods

JNDropDownMenu is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "JNDropDownMenu"

Change Log

V 0.1.4

• added support to pass custom width for menu
• expand menu now utilize entire screen height instead of 5 rows.

V 0.1.5

• added support to provide custom column title and disable change of title on row selection.

Set updateColumnTitleOnSelection flag to false. This will disable change of column title on row selection. Note: This will also disable highlight of last selected row item.

 menu.updateColumnTitleOnSelection = false

Override following function of JNDropDownMenuDataSource to provide custom title for column

func titleFor(column: Int, menu: JNDropDownMenu) -> String {
        return "Column \(column)"
    }

Note: If you don't override this, by default it will pick first object of column array as a column title and by default it will update the title of column on row selection.

V 0.1.6

• added support to define arrow position to left or right. Default is right.

Usage

menu.arrowPostion = .Left

Suggestions or feedback?

Feel free to create a pull request, open an issue or find me on Twitter.