tapGesture hyperLink swift - ios

I have an image and I want it to go to my website when anyone hit the picture
I used tapGesture to convert the image to a big button , but what I don't know how to do it , is that I want the app to take the user to my website when the user hit the image

That depends a bit on where you want the link to open. The two standard approaches are to either open the URL in a UIWebView you provide inside the app, or to tell the system to open the link in the mobile Safari browser (which will send your app to the background).
To me it sounds like it this second behaviour you want. You can achieve it by telling the UIApplication to open the URL, like so:
#IBAction func linkTapped(sender:UITapGestureRecognizer) {
if let url = NSURL(string: "http://stackoverflow.com/") {
UIApplication.sharedApplication().openURL(url)
}
}
Edit:
Some more info on how to set this up in the way you described: in your viewDidLoad, set up your gesture recognizer like this:
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "linkTapped:")
self.yourImageView.addGestureRecognizer(tapGestureRecognizer)
self.yourImageView.userInteractionEnabled = true
Make sure the IBOutlet for yourImageView is connected correctly. Then simply add the code given in the original answer as a method to the same class containing your viewDidLoad method. If the gesture recognizer fires, it should now execute the code in the linkTapped: method and open the URL.
Edit 2:
And because it actually fits in ~10 lines of code, here's a minimal view controller class as an example implementation.
class ViewController: UIViewController {
#IBOutlet var myImageView: UIImageView! //Check if connected correctly!
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "linkTapped:")
myImageView.addGestureRecognizer(tapGestureRecognizer)
myImageView.userInteractionEnabled = true
}
func linkTapped(sender:UITapGestureRecognizer) {
if let url = NSURL(string: "http://stackoverflow.com/") {
UIApplication.sharedApplication().openURL(url)
}
}
}

Related

BulletinBoard assign gesture for ImageView

I'm using BulletinBoard (BLTNBoard) to create dialogs in my iOS app. There's an option to embed image inside it. I would like to extend it's functionality and allow user to manipulate this image using tap gesture. But eventually when I assign a gesture to it's imageView using addGestureRecognizer nothing happens.
Here's how I initiliaze bulletin and add gesture to the image:
class ViewController: UIViewController {
lazy var bulletinManager: BLTNItemManager = {
let rootItem: BLTNPageItem = BLTNPageItem(title: "")
return BLTNItemManager(rootItem: rootItem)
}()
override func viewDidLoad() {
//etc code
let bulletinManager: BLTNItemManager = {
let item = BLTNPageItem(title: "Welcome")
item.descriptionText = "Pleas welcome to my app"
item.actionButtonTitle = "Go"
item.alternativeButtonTitle = "Try to tap here"
item.requiresCloseButton = false
item.isDismissable = false
item.actionHandler = { item in
self.bulletinManager.dismissBulletin()
}
item.alternativeHandler = { item in
//do nothing by now
}
//
item.image = UIImage(named: "welcome")
//adding gesture to its imageView
item.imageView?.isUserInteractionEnabled=true
let tap = UITapGestureRecognizer(target: self, action: Selector("tapTap:"))
item.imageView?.addGestureRecognizer(tap)
return BLTNItemManager(rootItem: item)
}()
}
#objc func tapTap(gestureRecognizer: UITapGestureRecognizer) {
print("TAPTAP!!!!!!")
}
}
and nothing happens at all (no message printed in console).
However if I assign action inside alternative button it works as expected:
item.alternativeHandler = { item in
item.imageView?.isUserInteractionEnabled=true
let tap = UITapGestureRecognizer(target: self, action: Selector("tapTap:"))
item.imageView?.addGestureRecognizer(tap)
}
I guess the only thing which can prevent me to assign the tap event to it properly is that imageView becomes available much later than the bulletin is created (for example only when it is shown on the screen).
Could you please help and correct my code. Thanks
upd.
Ok, based on Philipp's answer I have the following solution:
class myPageItem: BLTNPageItem {
override func makeContentViews(with interfaceBuilder: BLTNInterfaceBuilder) -> [UIView] {
let contentViews = super.makeContentViews(with: interfaceBuilder)
let imageView=super.imageView
imageView?.isUserInteractionEnabled=true
let tap = UITapGestureRecognizer(target: self, action: #selector(tapTap))
imageView?.addGestureRecognizer(tap)
return contentViews
}
#objc func tapTap(gestureRecognizer: UITapGestureRecognizer) {
print("TAPTAP!!!!!!")
}
}
When you're working with an open source library, it's easy to check out the source code to find the answer.
As you can see here, image setter doesn't initiate the image view.
Both makeContentViews makeArrangedSubviews (which are responsible for views initializing) doesn't have any finish notification callbacks.
Usually in such cases I had to fork the repo and add functionality by myself - then I'll make a pull request if I think this functionality may be needed by someone else.
But luckily for you the BLTNPageItem is marked open, so you can just subclass it. Override makeContentViews and add your logic there, something like this:
class YourOwnPageItem: BLTNPageItem {
override func makeContentViews(with interfaceBuilder: BLTNInterfaceBuilder) -> [UIView] {
let contentViews = super.makeContentViews(with: interfaceBuilder)
// configure the imageView here
return contentViews
}
}

how to detect when user click lyft Button swift

We want Lyft button touch event because I am working in analytics, so, I need how many people choose Lyft but I can't put UIView click event. I try below code.
let gesture = UITapGestureRecognizer(target: self, action: #selector(self.checkAction))
cell.lyftButton.addGestureRecognizer(gesture)
How can i achieve this?
You can directly assign a selector method to lyftButton e.g
lyftButton.addTarget(self, action: #selector(lyftButtonAction(_:)), for: .touchUpInside)
#objc
func lyftButtonAction(_sender: UIButton) {
//Do your action
}
To retrieve the LyftButton, you'll need to fetch the button inside the Lyft view, after retrieving it, I tried to add another target to it which was your 'checkAction' method, but for some reason it is not being called. One workaround solution is:
On Auto Layout, created a transparent button on top of the Lyft Button View, let's callet it 'Transparent Lyft Button': Example (I've embeded in another view because it was on a stackView);
On the code, retrieved the button with the above method, held it in a variable, let's call it 'requestLyftButton' and disabled it.
Created an IBAction for the 'Transparent Lyft Button' that triggers the method 'self.checkAction' that you've created and also calls requestLyftButton.sendActions(for: .touchUpInside), which triggers the original Lyft SDK action.
To Retrieve Lyft UIButton:
#IBOutlet weak var lyftButton: LyftButton!
#IBOutlet weak var transparentLyftButton: UIButton!
var requestLyftButton: UIButton?
func retrieveLyftButton(in view: UIView) {
for view in view.subviews {
if let lyftBtn = view as? UIButton {
lyftBtn.isEnabled = false
requestLyftButton = lyftBtn
} else {
retrieveLyftBtn(in: view)
}
}
}
transparentLyftButton IBAction to trigger your method + lyft sdk original action:
#IBAction func requestLyft(_ sender: UIButton) {
if let lyftBtn = requestLyftButton {
checkAction() // Your method
lyftBtn.sendActions(for: .touchUpInside)
}
}
I hope that you can understand what was done, if you have any questions, just let me know.

Is there a way for "force" the keyboard to dismiss in iOS Swift programmatically?

I have a viewController EditMessage which has two UITextFields (UITextView) which use the keyboard and they work great. This part is basic standard stuff. When the keyboard is displayed, I register a tag gesture for the entire view, so that if the user clicks anywhere else, I dismiss the keyboard:
self.view.addGestureRecognizer(UITapGestureRecognizer(target: self,
action: #selector(dismissKeyboard)))
In dismissKeyboard, this all works fine:
#objc func dismissKeyboard(sender: Any) {
self.view.endEditing(true)
}
However, I have a menu button(thumbnail image) implemented as a child view controller (UIViewController) on the same EditMessage view, which hijacks the screen via UIApplication.shared.keyWindow() to display an overlay and menu on the bottom of the screen. Built using the model/code from Brian Voong's YouTube channel to replicate a YouTube style slide in menu from the bottom. However, the keyboard is in the way. Since the child is a different view controller "endEditing" doesn't work (or maybe I am referencing the wrong view?).
class ButtonPickerController : UIViewController,
UIGestureRecognizerDelegate, UINavigationControllerDelegate {
var maxSize = CGFloat(60)
let thumbnail: UIImageView = {
let thumbnail = UIImageView()
thumbnail.backgroundColor = UIColor.lightGray
return thumbnail
}()
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(self.buttonTapped(sender:)))
tap.delegate = self
view.addGestureRecognizer(tap)
//view.backgroundColor = .yellow
view.contentMode = .scaleAspectFit
thumbnail.frame = CGRect(x: 0, y: 0, width: self.maxSize, height: self.maxSize)
setupSubviews()
}
Can someone point me in a good direction? This is my first question so hopefully I am asking properly.
I figured it out in the end. Thank you for the help. In my child view controller I did used the following statement when the button was tapped:
#objc func buttonTapped(sender: UITapGestureRecognizer? = nil) {
self.parent!.view.endEditing(true)
}
First, its not a good way to present overlays as UIViewController.
But a solution good be, to give the second viewcontroller a reference to the first one before viewDidLoad is called. Do you use Segues ? So in prepare would be the right place. In the second viewcontroller you create a property for the first one and then use this property as target when you create the UITapGestureRecognizer.
Another way is using a protocol and delegation.

Assign two different UITapGestureRecognizer for a custom control using swift

using swift, I'm trying to create a dynamic and generic control to reuse it, basically, the control should have a general behavior inside.
To be more specific, I have a UIScrollView and it's filled using UIViews, when you click over an UIView, the background should change.
That is working correctly.
But, for the implementation, my class of the generic control, accepts a Selector as parameter.
Both works separately, but together are not working.
The specific part of codes are:
Generic class
let clickAgendaEvent = UITapGestureRecognizer(target: self, action: #selector (self.agendaClicked (_:)))
cellSubView.addGestureRecognizer(clickAgendaEvent)
cell.addSubview(cellSubView)
let itemClickedEvent = UITapGestureRecognizer(target: viewController.self, action: self.agendaItemClicked! )
cell.addGestureRecognizer(itemClickedEvent)
And a ViewController with an implementation like this:
#objc func eventDailyAgenda(sender:UIView!){
print("Item clicked!")
}
As you can see, the second event, is not inside of the generic class, the second event is a separated implementation if the ViewController.
But, the generic class, would be implemented for other UIViewController.
Someone have an idea about how can handle it?
Look into UIGestureRecognizerDelegate to handle both gestures simultaneously. Check out the callback gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:) . Return true to have both handled simultaneously.
The easier way to do it, is implementing UIGestureRecognizerDelegate.
But for my specific case didn't work, because, I have different classes implementing the behavior.
But, I found a way to do it.
And is implementing NSObject (if you are in a UIViewController you don't have to implement it.
For my case I have my class:
class MyClass:NSObject {
func createAll(){
let clickAgendaEvent = UITapGestureRecognizer(target: self, action: #selector (self.agendaClicked (_:)))
cellSubView.addGestureRecognizer(clickAgendaEvent)
cellSubView.tag = index
cell.addSubview(cellSubView)
}
#objc func agendaClicked(_ sender:AnyObject) {
baseView.setTransparentToSubViews()
print("Here")
let tap = sender as! UITapGestureRecognizer
tap.view?.backgroundColor = UIColor().hexStringToUIColor(hex: "#e0e0e0")
if let v = tap.view {
// use button
print("The tag is \(v.tag)")
}
if let c: NSObject.Type = NSClassFromString(viewController.className) as? NSObject.Type{
let c_tmp = c.init()
c_tmp.perform(Selector(("test")))
c.perform(Selector(("static_test")))
}
}
}
Add in your ViewController
#objc public func test(){
print("This is Test!!!")
}
#objc public class func static_test(){
print("This is Static Test")
}
And this extension:
import Foundation
import UIKit
extension UIViewController {
var className: String {
return NSStringFromClass(self.classForCoder)
}
}
Now, you can execute all the methods you want.
For this case, once the user touch an element, the next event is fired from the touch, and not is necessary to add a new delegate.
Maybe is not the better way, but is totally functional.

Tap on UIWebView to transition to different viewController

I have a webview inside view controller "A", is it possible to tap on web view and seaque to view controller "B"?
I have tried do following
#IBOutlet weak var mainWebView: UIWebView!
let tapUIWebView = UITapGestureRecognizer()
override func viewDidLoad() {
super.viewDidLoad()
tapUIWebView.addTarget(self, action: "webViewTapped")
mainWebView.userInteractionEnabled = true
mainWebView.addGestureRecognizer(tapUIWebView)
func webViewTapped(){
println("Tapped")
}
}
Thank you
1) Use a UITapGestureRecognizer, create the instance.
2) Attach it to the webview.
3) Implement the action method that handles the gesture.
4) SinceUIWebView already recognises a touch, you need to also take care that your recognizer does the job first. And you decide what to do with the touch.
5) If it suits you, you can disable handling the tap in the built-in recogniser completely.

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