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Adjusting map view span to annotiation pins in Swift


Adjusting map view span to annotiation pins in Swift

By : user2949761
Date : November 17 2020, 04:28 AM
wish of those help If you can target iOS 7 or above, you can use showAnnotations:animated, and pass in the map view's annotation property.
code :


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iPhone MKMapView: set span/region value to show all pins on map

iPhone MKMapView: set span/region value to show all pins on map


By : renata
Date : March 29 2020, 07:55 AM
Any of those help It's not clear what your exact issue is but the following may help:
code :
inset = -zoomRect.size.width * 0.20;
[mapVW showAnnotations:mapVW.annotations animated:YES];
Adjusting text view height while editing Swift

Adjusting text view height while editing Swift


By : Raj
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The idea is to set up a height constraint on the TextView, add key value observer for contentSize property of a textview, and then manipulate the height constraint of a TextView on each contentSize change. Please find a demo project here https://github.com/achikin/adjustabletextview
Swift swipe navigation adjusting view controller size

Swift swipe navigation adjusting view controller size


By : bhanutech
Date : March 29 2020, 07:55 AM
I hope this helps . Notice that using viewDidLoad for set frame manually is a bit risky and should be avoided since the bounds are not set. Instead use the viewDidLayoutSubviews to do that but take a look because the method is called all the time when the UI elements change including constraints.
code :
    var scrollViewAdded = false

override func viewDidLayoutSubviews() {

    super.viewDidLayoutSubviews()

    if !scrollViewAdded {

        self.loadSrollView()

        self.scrollViewAdded = true
    }
}


func loadSrollView() {

    self.scrollView.pagingEnabled = true

    let vc0 = self.storyboard?.instantiateViewControllerWithIdentifier("ViewController0")

    self.addChildViewController(vc0!)
    self.scrollView.addSubview(vc0!.view)
    vc0!.didMoveToParentViewController(self)

    let vc1 = self.storyboard?.instantiateViewControllerWithIdentifier("ViewController1")

    var frame1 = vc1!.view.frame
    frame1.origin.x = self.view.frame.size.width
    vc1!.view.frame = frame1

    self.addChildViewController(vc1!)
    self.scrollView.addSubview(vc1!.view)
    vc1!.didMoveToParentViewController(self)

    let vc2 = self.storyboard?.instantiateViewControllerWithIdentifier("ViewController2")

    var frame2 = vc2!.view.frame
    frame2.origin.x = self.view.frame.size.width * 2
    vc2!.view.frame = frame2

    self.addChildViewController(vc2!)
    self.scrollView.addSubview(vc2!.view)
    vc2!.didMoveToParentViewController(self)

    let vc3 = self.storyboard?.instantiateViewControllerWithIdentifier("ViewController3")

    var frame3 = vc3!.view.frame
    frame3.origin.x = self.view.frame.size.width * 3
    vc3!.view.frame = frame3

    self.addChildViewController(vc3!)
    self.scrollView.addSubview(vc3!.view)
    vc3!.didMoveToParentViewController(self)

    self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width * 4, self.view.frame.size.height - 66)
}
Swift: Collection View not adjusting correctly to change in size

Swift: Collection View not adjusting correctly to change in size


By : Sohum Shah
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You need to invalidate the layout. It does not do so on its own. Call invalidateLayout() on the flow layout after your call to layoutIfNeeded().
code :
flowLayout.invalidateLayout()
Swift Mapview Custom Call Out View with default map view pins

Swift Mapview Custom Call Out View with default map view pins


By : Naikon
Date : March 29 2020, 07:55 AM
Hope this helps You need not addSubView calloutView. You can use MKAnnotationView as Custom Callout.
e.g. You should arrange the source code
code :
class PinAnnotation : NSObject, MKAnnotation {
    var coordinate : CLLocationCoordinate2D
    var title: String?
    var calloutAnnotation: CustomBusinessCallOut?

    init(location coord:CLLocationCoordinate2D) {
        self.coordinate = coord
        super.init()
    }
}

class CustomBusinessCallOut : NSObject, MKAnnotation {
    var coordinate: CLLocationCoordinate2D
    var title: String?

    init(location coord:CLLocationCoordinate2D) {
        self.coordinate = coord
        super.init()
    }
}

class CalloutAnnotationView : MKAnnotationView {
}
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation {
        return nil
    }

    if annotation is PinAnnotation {
        let reuseId = "Pin"
        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId) as? MKPinAnnotationView
        if pinView == nil {
            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        }
        else {
            pinView?.annotation = annotation
        }

        return pinView
    } else if annotation is CustomBusinessCallOut {
        let reuseId = "Callout"
        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId)
        if pinView == nil {
            pinView = CalloutAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            pinView?.addSubview(UIImageView(image: UIImage(named: "car")))
        }
        else {
            pinView?.annotation = annotation
        }

        return pinView
    } else {
        return nil
    }
}

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    guard view.annotation is PinAnnotation else { return }
    if let pinAnnotation = view.annotation as? PinAnnotation {
        let calloutAnnotation = CustomBusinessCallOut(location: pinAnnotation.coordinate)
        calloutAnnotation.title = pinAnnotation.title
        pinAnnotation.calloutAnnotation = calloutAnnotation
        mapView.addAnnotation(calloutAnnotation)
    }
}

func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
    guard view.annotation is PinAnnotation else { return }
    if let pinAnnotation = view.annotation as? PinAnnotation,
        let calloutAnnotation = pinAnnotation.calloutAnnotation {
        mapView.removeAnnotation(calloutAnnotation)
        pinAnnotation.calloutAnnotation = nil
    }
}
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