Trigger tap on MSSticker or view programmatically?

Question

Alright, I have looked at How to trigger tap gesture recognizer of UIView programmatically and similar questions but cant find what I am looking for. I am building an iMessage app extension, and need too programmatically trigger a tap event on an MSSticker.

I have made custom MSStickerViews with the following class that detects when it has been pressed and/or tapped, then triggers another function, however I do not know how to actually SIMULATE these taps so that the sticker will be put in the entry field:

protocol InstrumentedStickerViewDelegate: class {
    func stickerViewDidSelect(stickerView: MSStickerView)
    func stickerViewDidPeel(stickerView: MSStickerView)
}

class InstrumentedStickerView: MSStickerView {
    weak var delegate: InstrumentedStickerViewDelegate?

    override init(frame: CGRect) {
        super.init(frame: frame)

        for gestureRecognizer in gestureRecognizers ?? [] {
            if let tapGestureRecognizer = gestureRecognizer as? UITapGestureRecognizer {
                tapGestureRecognizer.addTarget(self, action: #selector(didTap))
            } else if let longPressGestureRecognizer = gestureRecognizer as? UILongPressGestureRecognizer {
                longPressGestureRecognizer.addTarget(self, action: #selector(didLongPress))
            }
        }


    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func didTap(tapGestureRecognizer: UITapGestureRecognizer) {
        if tapGestureRecognizer.state == .recognized {
            delegate?.stickerViewDidSelect(stickerView: self)
        }
    }

    func didLongPress(longPressGestureRecognizer: UILongPressGestureRecognizer) {
        if longPressGestureRecognizer.state == .began {
            delegate?.stickerViewDidPeel(stickerView: self)
        }
    }
}

The reason why just calling one of the tap functions above won't work is I don't need to trigger any certain function with the tap - I just need to create a fake tap on the MSSticker within the MSStickerView so it will be put in the entry field. I have no idea how to do this.

I create my MSStickerViews like this and put them in a collection view, but programmatically tapping the collection view cell does nothing (Ive tried):

var url: URL?
        var i = 1
        while i < 5 { //while true
            url = Bundle.main.url(forResource: "test5", withExtension: "png") //would be "test\(i)"
            print("URL IS THIS: \(url)")
            guard let url = url else { break }

            //make it a sticker
            let sticker = try! MSSticker(contentsOfFileURL: url, localizedDescription: "test\(i)")

            //let stickerView = InstrumentedStickerView(frame: CGRect(x: 0, y: 0, width: view.bounds.width*0.4, height: view.bounds.width*0.4))
            let stickerView = InstrumentedStickerView(frame: CGRect(origin: CGPoint(x: 0,y :0), size: stickerSize))
            stickerView.sticker = sticker
            stickerView.delegate = self

            starterPack.append(stickerView)

            i += 1

I have a feeling maybe something like (pseudo code)

starterPack[1].sendActionForEvent(UIEvent.Tap)

is correct, but the MSStickerView doesn't have .sendActionForEvent

I am desperate. How can I create a fake tap?

i also worked on this issue but did not get solution if you want to achieve this functionality you use image view instead of stickerview and perform any action that you want in your collectionview cell delegate method didselect. — Shauket Sheikh

shallowThought shallowThought · Accepted Answer · 2016-12-07T22:14:16

You have to create a MSMessage, which you than can insert to your current MSConversation.

conversation.insert(message) { error in
    // handle error
}

See Apples sample code.

Trigger tap on MSSticker or view programmatically?

2 Answers