How to add UIView Gesture - Programmatically UIView - ios

Question

I have searched a lot about adding a gesture on UIView when it is tapped. There are many solutions but none of them worked for me.
I have made UIView class programmatically and using the view in different classes.
Here is my class of UIView:
class PaymentServiceView: UIView {
private let views: UIView = {
let view = UIView()
view.backgroundColor = .white
// view.layer.maskedCorners = [.layerMinXMinYCorner,.layerMaxXMinYCorner]
view.layer.borderColor = UIColor.gray.cgColor
view.layer.shadowOpacity = 0.3
view.layer.shadowColor = UIColor.gray.cgColor
view.layer.shadowRadius = 10
view.layer.borderWidth = 0.1
view.layer.cornerRadius = 20
view.isUserInteractionEnabled = true
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
private let titleLbl: UILabel = {
var label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.textAlignment = .center
label.textColor = UIColor.black
label.font = UIFont(name: AppFontName.circularStdRegular, size: 18)
label.clipsToBounds = true
return label
}()
private let subLbl: UILabel = {
var label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.textAlignment = .center
label.textColor = UIColor.gray
label.numberOfLines = 0
label.textAlignment = .left
label.font = UIFont(name: AppFontName.robotoRegular, size: 15)
label.clipsToBounds = true
return label
}()
private let image: UIImageView = {
let imageView = UIImageView()
imageView.contentMode = .scaleAspectFit
imageView.clipsToBounds = true
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
private let btnImage: UIImageView = {
let imageView = UIImageView()
imageView.contentMode = .scaleAspectFit
imageView.clipsToBounds = true
imageView.image = UIImage(named: IconName.chevron_down)?.transform(withNewColor: UIColor.btnGray)
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
init(titleLabel: String, subTitleLabel: String, imageName: String) {
super.init(frame: CGRect.zero)
self.addSubview(views)
self.views.addSubview(btnImage)
self.views.addSubview(titleLbl)
self.views.addSubview(image)
self.views.addSubview(subLbl)
titleLbl.text = titleLabel
image.image = UIImage(named: imageName)
subLbl.text = subTitleLabel
setupConstraints()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func setupConstraints() {
self.views.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
self.views.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
self.views.heightAnchor.constraint(equalToConstant: 150).isActive = true
self.views.widthAnchor.constraint(equalToConstant: 320).isActive = true
self.image.centerYAnchor.constraint(equalTo: self.views.centerYAnchor).isActive = true
self.image.leadingAnchor.constraint(equalTo: self.views.leadingAnchor, constant: 15).isActive = true
self.image.widthAnchor.constraint(equalToConstant: 30).isActive = true
self.image.heightAnchor.constraint(equalToConstant: 30).isActive = true
self.titleLbl.centerYAnchor.constraint(equalTo: self.views.centerYAnchor, constant: -35).isActive = true
self.titleLbl.leadingAnchor.constraint(equalTo: image.trailingAnchor, constant: 15).isActive = true
self.subLbl.topAnchor.constraint(equalTo: titleLbl.bottomAnchor, constant: 5).isActive = true
self.subLbl.leadingAnchor.constraint(equalTo: image.trailingAnchor, constant: 15).isActive = true
self.subLbl.trailingAnchor.constraint(equalTo: btnImage.leadingAnchor, constant: -15).isActive = true
btnImage.topAnchor.constraint(equalTo: views.topAnchor, constant: 55).isActive = true
btnImage.rightAnchor.constraint(equalTo: views.rightAnchor, constant: -10).isActive = true
btnImage.heightAnchor.constraint(equalToConstant: 10).isActive = true
}
}
Now Im using this UIView class in PaymentServicesViewController
class PaymentServicesViewController: UIViewController {
private (set) lazy var headerView: HeaderView = { [unowned self] in
let view = HeaderView.init(titleLbl: Headings.paymentService, closeAction: {
self.navigationController?.popViewController(animated: true)
}, nextAction: {
print("next")
}, previousAction: {
self.navigationController?.popViewController(animated: true)
})
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
private let fundTransferView: PaymentServiceView = {
let view = PaymentServiceView(titleLabel: Headings.fundTransfer, subTitleLabel: Description.fundTransferDecription , imageName: IconName.fundImage )
view.isUserInteractionEnabled = true
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
private let subscriptionView: PaymentServiceView = {
let view = PaymentServiceView(titleLabel: Headings.subscribe, subTitleLabel: Description.subscriptionDescription, imageName: IconName.subImage )
view.isUserInteractionEnabled = true
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
private let billPaymentView: PaymentServiceView = {
let view = PaymentServiceView(titleLabel: Headings.billPayment, subTitleLabel: Description.billPaymentDescription , imageName: IconName.billImage )
view.isUserInteractionEnabled = true
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .gray2
let fundtrasnferGesture = UITapGestureRecognizer(target: self, action: #selector(fundTranferTapped))
fundTransferView.isUserInteractionEnabled = true
self.fundTransferView.addGestureRecognizer(fundtrasnferGesture)
let subscribeGesture = UITapGestureRecognizer(target: self, action: #selector(subscribeTapped))
subscriptionView.isUserInteractionEnabled = true
self.subscriptionView.addGestureRecognizer(subscribeGesture)
let billPaymentGesture = UITapGestureRecognizer(target: self, action: #selector(billPaymentTapped))
fundTransferView.isUserInteractionEnabled = true
self.billPaymentView.addGestureRecognizer(billPaymentGesture)
view.addSubview(headerView)
view.addSubview(subscriptionView)
view.addSubview(fundTransferView)
view.addSubview(billPaymentView)
setupConstraint()
}
#objc func fundTranferTapped(sender: UITapGestureRecognizer) {
print("FundTransfer Tapped.")
}
#objc func subscribeTapped(sender: UITapGestureRecognizer) {
print("Subscribe Tapped.")
}
#objc func billPaymentTapped(sender: UITapGestureRecognizer) {
print("BillPayment Tapped.")
}
private func setupConstraint() {
headerView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
headerView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
headerView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
headerView.heightAnchor.constraint(equalToConstant: 100).isActive = true
subscriptionView.trailingAnchor.constraint(equalTo: fundTransferView.trailingAnchor, constant: 0).isActive = true
subscriptionView.leadingAnchor.constraint(equalTo: fundTransferView.leadingAnchor, constant: 0).isActive = true
subscriptionView.bottomAnchor.constraint(equalTo: fundTransferView.topAnchor, constant: -130).isActive = true
fundTransferView.centerXAnchor.constraint(equalTo: view.centerXAnchor, constant: 0).isActive = true
fundTransferView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 0).isActive = true
billPaymentView.leadingAnchor.constraint(equalTo: fundTransferView.leadingAnchor, constant: 0).isActive = true
billPaymentView.trailingAnchor.constraint(equalTo: fundTransferView.trailingAnchor).isActive = true
billPaymentView.topAnchor.constraint(equalTo: fundTransferView.bottomAnchor, constant: 130).isActive = true
}
}
I know there is a small mistake I'm doing but not sure. Help would be appreciated, Thank you.

Answer 1

You are missing a couple constraints...
If you add this at the end of viewDidLoad():
subscriptionView.clipsToBounds = true
fundTransferView.clipsToBounds = true
billPaymentView.clipsToBounds = true
You'll see that the views "disappear":
because they have no Width or Height constraints (so their size is .zero).
In setupConstraints() in your PaymentServiceView class, add these two lines:
self.widthAnchor.constraint(equalTo: self.views.widthAnchor).isActive = true
self.heightAnchor.constraint(equalTo: self.views.heightAnchor).isActive = true
Now, the PaymentServiceView will be the same Width and Height as self.views view.
However, now that the views have Heights:
your layout needs to be adjusted.
Change the .clipsToBounds back to false (remove those added lines) so the shadows won't be clipped, and change these constraints in your controller (adjust the 15 and -15 to your liking):
//subscriptionView.bottomAnchor.constraint(equalTo: fundTransferView.topAnchor, constant: -130).isActive = true
subscriptionView.bottomAnchor.constraint(equalTo: fundTransferView.topAnchor, constant: 15).isActive = true
//billPaymentView.topAnchor.constraint(equalTo: fundTransferView.bottomAnchor, constant: 130).isActive = true
billPaymentView.topAnchor.constraint(equalTo: fundTransferView.bottomAnchor, constant: -15).isActive = true
and we get:
Now, because the views have a size, the Tap Gestures will work.