A Material Design drop down for iOS

UIResponder issues in swift 4.1 when using 2.3.3 version. What is the pod version for Swift 4.1 . Swift 4.0 has 2.3.3 , swift 4.2 has 2.3.4 , Please see attachment

Hi Kevin,

Thanks again for supporting this open source library. It's very well written in my opinion and I've had an easy time using it. I do have DropDown working successfully from Objective-C in one table view controller that is static-grouped and the first child of a navigation controller in a tabbar controller. Yesterday I attempted to add it a second view controller which is loaded dynamically and presented modally, which are the only differences that I can see between the uses of it.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    SQFBFriendTableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:[SQFBFriendTableViewCell reuseIdentifier]];
    ... // some switching to detect the correct section, but the routing is correct

    self.multiplePhoneNumbersMenu = [[DropDown alloc] init];
    self.multiplePhoneNumbersMenu.textFont = [UIFont gothamBookAtSize:16];
    self.multiplePhoneNumbersMenu.textColor = [UIColor squadColorGrey103];
    self.multiplePhoneNumbersMenu.anchorView = cell;

     // this offset is from my implementation in the other tableview controller, toggling it has no effect on the issue
    CGFloat offset = self.multiplePhoneNumbersMenu.anchorView.plainView.bounds.size.height;
    self.multiplePhoneNumbersMenu.bottomOffset = CGPointMake(0, offset);
    self.multiplePhoneNumbersMenu.topOffset = CGPointMake(0, -offset);


    self.multiplePhoneNumbersMenu.dataSource = @[ @"Hello world" ];
    @weakify(self);
    self.multiplePhoneNumbersMenu.selectionAction = ^(NSInteger index, NSString * _Nonnull item) {
        @strongify(self);
        ... // does stuff
    };

    [self.multiplePhoneNumbersMenu show];
    // breakpoint here po's the frame as 0,0,0,0. the cell selection is highlighted, but the DropDown never appears
}

po self.multiplePhoneNumbersMenu
<DropDown.DropDown: 0x158641170; frame = (0 0; 0 0); alpha = 0; animations = { opacity=<CABasicAnimation: 0x1581db490>; }; layer = <CALayer: 0x1585247d0>>

I feel like I'm possibly missing something basic, but the implementation is mostly parallel to the one in my other class is the working. Any insight that you can offer would be appreciated. Thanks again!

~Mark

it crashes if you directly use a local variable "let dropDown = DropDown()", rather than assigning dropDown as a property. However it works in Xcode7.3.

hi i update DropDown from 1 to 1.5 but when running program app not working and error "DropDown.DropDown.anchorView.setter : weak DropDown.AnchorView?", referenced from:

Undefined symbols for architecture x86_64:
  "DropDown.DropDown.anchorView.setter : weak DropDown.AnchorView?", referenced from:
      balen.AircraftSearch.viewDidLoad () -> () in AircraftSearch.o
  "protocol witness table for __ObjC.UIView : DropDown.AnchorView in DropDown", referenced from:
      balen.AircraftSearch.viewDidLoad () -> () in AircraftSearch.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

notthing happen when i click button. The second time, when i click button dropDown.willShowAction work.

let dropDown = DropDown()
    var labelArr = ["Car", "Motorcycle"]
    var imageArr = ["logout.png","camera.png"]

    @IBAction func xzx(sender: AnyObject) {
        dropDown.anchorView = viewSetting
        //     dropDown.dataSource = labelArr
        DropDown.appearance().backgroundColor = UIColor.blackColor()
        //dropDown.direction = .Bottom
       // dropDown.bottomOffset = CGPoint(x: 0, y: self.viewSetting.bounds.height)
        dropDown.cellNib = UINib(nibName: "DropTableViewCell", bundle: nil)
        dropDown.customCellConfiguration = { (index: Index, item: String, cell: DropDownCell) -> Void in
            guard let cell = cell as? DropTableViewCell else { return }

            // Setup your custom UI components
            cell.optionLabel.text = self.labelArr[index]
            cell.imgIcon.image = UIImage(named: self.imageArr[index])
        }
        dropDown.show()
        dropDown.willShowAction = { [unowned self] in
            print("Drop down will show")
        }
    }

Help me pls :)

This PR includes changes as proposed on #21

I had to also remove the static template for fitting calculations, as it can now depend on custom cells. Not sure if we should also call the custom cell block in that case to get the best fitting width possible.

Note that the API is still the same and fully backwards compatible.

Library description states that it should be compatible with projects for ios 7+, but im getting this error in an empty project when declaring the 'import DropDown'

.../ViewController.swift:10:8: Module file's minimum deployment target is ios9.2 v9.2: ../Build/Products/Debug-iphoneos/DropDown.framework/Modules/DropDown.swiftmodule/arm.swiftmodule

    My App is crashing here line 485 in DropDown.swift . I cant figure out why . I am not using DropDown in viewcontroller it is crashing .

    dispatch_async(dispatch_get_main_queue()) { [unowned self] in
        self.tableView.flashScrollIndicators()
    }
    super.updateConstraints()

GAIUncaughtExceptionHandler(NSException *) (GAIUncaughtExceptionHandler.m:48): Uncaught exception: Could not load NIB in bundle: 'NSBundle </Users/tuliothome/Library/Developer/Xcode/DerivedData/iOSFanfics-enerleptowspyagorhkcphtttefg/Build/Products/Debug-iphonesimulator/DropDown.framework> (loaded)' with name 'DropDownCell'

Hi, thank you for an awesome package I want to implement Dropdown in my custom view. Something like this:

import UIKit
import DropDown

class FiltersView: UIView {
    var view: UIView!

    @IBOutlet weak var seeViewDropDown: UIView!
    @IBOutlet weak var sortViewDropDown: UIView!
    @IBOutlet weak var filterViewDropDown: UIView!

    override init(frame:CGRect) {

        super.init(frame: frame)
        setup()
    }

    required init?(coder aDecoder: NSCoder) {

        super.init(coder: aDecoder)
        setup()
    }

    func someAction(sender:UITapGestureRecognizer){

        let dropDown = DropDown()

        // The view to which the drop down will appear on
        dropDown.anchorView = seeViewDropDown // UIView or UIBarButtonItem

        // The list of items to display. Can be changed dynamically
        dropDown.dataSource = ["Car", "Motorcycle", "Truck"]

        dropDown.show()
    }

    func setup() {
        view = loadViewFromNib()
        view.frame = bounds
        addSubview(view)

        let gestureSwift2AndHigher = UITapGestureRecognizer(target: self, action:  #selector (self.someAction(sender:)))
        seeViewDropDown.addGestureRecognizer(gestureSwift2AndHigher)
    }

    func loadViewFromNib() -> UIView {
        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: "FiltersView", bundle: bundle)
        view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView

        return view
    }

}

The target is that clicking on seeViewDropDown view to show dropdown. But when I click seeViewDropDown. This error happen:

I think I do something wrong but don't know where. Could you help me ? Thank you.

When using pods to install for Xcode 8-beta 6, there's errors saying to convert to swift 2.3 or swift 3.0. After following apple's walkthrough to convert it, there's still around 135 syntax errors.

Building the demo with Xcode 8 builds, but the simulator doesn't show up.

Unsure if DropDown isn't intended to work with Xcode 8.

Changes have been made to automatically adjust the height of table rows depending on the text.

Also added the ability to adjust the numberOfLines of the standard cell

By default numberOfLines = 1

Hello,

I was working on a project and I realised there is no functionality to make a border on drop down, and the tableView is file private so you cannot explicitly make changes in it.

Please assign me this issue, so that I may add up the required functionality to make this pod more useful.

Thanks!

Hello. I know multi-selection can be handled by multiSelectionAction handler. I want to add a "done" button so that the user can hide the dropDown after finishing selecting cells.

The only way i found so far is by using dataSource. By adding extra "done" string in datasources and when the "done" cell index is selected, call dropDown.hide() But I am pretty sure there can be a better way for this.

Thank you.

In pod file DropDown.swift do following changes for custom height

Step 1 : Add this below width property

public var height: CGFloat? {
       didSet { setNeedsUpdateConstraints() }
 }

Step 2 : In public override func updateConstraints() do this

replace 
`heightConstraint.constant = layout.visibleHeight `
with following

if let height = self.height {
    if layout.visibleHeight >= height {
         heightConstraint.constant = self.height ?? layout.visibleHeight
     } else {
         heightConstraint.constant = layout.visibleHeight
     }
} else {
     heightConstraint.constant = layout.visibleHeight
}

Step 3 : In fileprivate func computeLayoutForTopDisplay(window: UIWindow) -> ComputeLayoutTuple do this

replace

if y < windowY {
    offscreenHeight = abs(y - windowY)
    y = windowY
}

with following

if y < windowY {
 offscreenHeight = abs(y - windowY)
  if let height = self.height {
         y = anchorViewMaxY + topOffset.y - height
    } else {
          y = windowY
    }
 }

Uses

let dropDown = DropDown()
dropDown.height = 50

If height is not set, the dropdown height will be its content size and if content size is greater than screen/superview size then it will stop at view bounds and dropdown's scroll is activated. If you don't want that set height as suggested above. After setting height:-

1. if your content size is less than your assigned height it will wrap to its content means dropdown will have height of its content size, you will see all dropdown option in list.
2. If content size exceeds assigned height then dropdown will have its assigned height and scroll will be activated.