I have a project set up using SWReveal for the slide out menu.
When I place a motion ended override function it never seems to be called even though everything else in the class loads (indicated with the 'loading'.
I have had a good play around and found that if I change the segue to the page to a 'show' segue the code functions as I would expect it to.
However when I use a custom segue with the SWReveal as the class the motion ended does not work.
I have attached a screen shot to help describe the issue.
Any help much appreciated.
You need to override canBecomeFirstResponder method.
override func canBecomeFirstResponder() -> Bool {
return true
}
Related
I am going to detect the swiping or selecting tab event in XLPagerTabStrip library in Swift 4.
I only need to get the tab index whenever selected tab is changed.
So I have checked library in Github but not found any good solutions.
thanks.
So I didn't find a solution from the library itself but, I used viewWillDisappear and for every time you swipe away of the view this function will be called.
Should be written as follows in your child view controller:
override func viewWillDisappear(_ animated: Bool) {
//Do your thing here
}
You can read more about this callback function here.
You can simply override updateContent
override func updateContent() {
super.updateContent()
// your code ....
}
I am trying to catch doubleClick events from my NSOutlineView to be passed to my ViewController. My idea is to catch doubleClick events and to get the selected row from my OutlineView
What I did so far was subclassing the NSOutlineView in order to overwrite mouseDown
override func mouseDown(with event: NSEvent) {
super.mouseDown(with: event)
if event.clickCount >= 2 {
...
}
}
That works well however I don't know how to pass this event to my ViewController. The ViewController is already implementing the NSOutlineViewDelegate protocol.
I guess that the solution is not far away but somehow I am stuck.
UPDATED
Although you can set up NSGestureRecognizer for single click and NSClickGestureRecognizer for double clicks in OSX, You should probably be using the doubleAction property of the NSOutlineView directly.
Here's an example of how to set it up
This comes from a another of the Wenderlich tutorials, and there is a good discussion on SO already
I currently facing an issue trying to delegate SWRevealViewController panGestureRecognizer method in one of my view.
When i slide my UISlider, the panGesture interfer and open the sidemenu instead to move my slider.
i tried to delegate the panGesture and it works well, but if i quit my view and go to an other, the pangesture is not functionnal anymore, and i can't reveal my sidemenu from my second view.
My code :
class Search : UIViewController, UIGestureRecognizerDelegate{
#IBOutlet weak var sliderprice: UISlider!
override func viewDidLoad() {
super.viewDidLoad()
self.revealViewController().panGestureRecognizer().delegate = self
}
override func viewDidAppear(animated: Bool) {
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
if (touch.view == self.sliderprice){
return false
}
else{
return true
}
}
}
While this is an old question, I'll answer it anyways, maybe for someone coming from Google search it will be helpful.
After many hours of research and thinking, finally I was able to come up with multiple solutions to this problem.
The Lazy
This solution is not recommended, but working, so I decided to list it.
Before setting self as self.revealViewController().panGestureRecognizer()'s delegate, store the original self.revealViewController().panGestureRecognizer().delegate to a property, and when you leave the screen at viewWillDisappear(), set self.revealViewController().panGestureRecognizer().delegate back to the one you stored in viewDidLoad(). So in the end it gets back its original delegate. Tampering with delegates like this is never really recommended, but I said, it works.
The Nicer One
I consider this still not the best solution, but we are getting there. Find a class, a controller that you use in the whole application and gets called when you start the app. Here set the SWRevealViewController's panGestureDelegate to this class, and overwrite the gestureRecognizerShouldBeginmethod appropriately (see below).
The Best One - (in my opinion)
Now this is the best and most clear solution.
For the time being (May, 2018) the last commit to SWRevealViewController was in 2015.
Fork the original project ( https://github.com/John-Lluch/SWRevealViewController ) or simply copy the two necessary files (SWRevealViewController.m and SWRevealViewController.h) and place them into a separate folder to handle 3rd party libraries. Then you can remove SWRevealViewController from your Podfile. Don't forget to fix your imports for SWRevealViewController where you have it.
Now you are free to modify the files. What I suggest is the following.
Go to SWRevealViewController.m and implement the following method:
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldReceiveTouch:(UITouch *)touch
{
return ![touch.view isKindOfClass:UISlider.class];
}
If the touched view is a UISlider (or a custom class that inherits from UISlider) the gesture won't begin, meaning the pan gesture will no longer be conflicted with the UISlider's pan gesture.
I seriously hope I could help anyone out there as this problem was a pain in my back for quite some time now.
I am looking at Apple documentation here and not able to implement it in my swift project. I want to set a UIButton as the first focused in View when the app starts but cant figure out how.
I am primarily looking to do something like this:
override func preferredFocusedView .... but obviously that is not it
It's a property, not a function, so you need to do this in Swift:
override weak var preferredFocusedView: UIView? {
get {
return viewYouWantToFocus
}
}
In your UIViewController override get{} for preferredFocusedView to return your UIButton. Then make sure to call setNeedsFocusUpdate(). That should do it. (You can also implement set{} so that you can easily change which object receives focus, but again, remember to call setNeedsFocusUpdate() after changing it).
I have created a local notification in Swift which gives the option to end a current game without having to go back in to the app. That's all fine and works as it should. The issue I'm having is that if the user does this, I don't want them to go back to the Game view controller if that happens to be the last view that was open when the app entered the background. I would like them to go back to the app's Home view controller instead.
I expected to be able to add a perform segue to my Game view controller in the following way, should the criteria match. I tried adding it to viewDidAppear(), but it didn't work:
override func viewDidAppear(animated: Bool) {
if isThereACurrentGame() == false {
performSegueWithIdentifier("unwindToHomeScreen", sender: self)
}
}
Is this something to do with viewDidAppear() not being called when the app comes back to the foreground? If so, what might an alternative be?
P.S. My isThereACurrentGame() function works as it should, as does the performSegueWithIdentifier elsewhere in the view controller, so these aren't the cause of the problem.