CODEWITHSUNDEEP
iosswift
Katie H
Katie H

Reputation: 2293

Custom Callout - ViewDidLoad - Swift

I have a custom class for a map pin callout in Swift app, which connects to a .xib file. I am trying to change to text of a label inside of the view when the user clicks on the pin an the view loads. Here is what I have I have:

import Foundation
import MapKit

class CustomCallout: UIView {

    @IBOutlet weak var testLabel: UILabel!

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!

        testLabel.text = "test"
    }


    override func hitTest( point: CGPoint, withEvent event: UIEvent?) -> UIView? {
        let viewPoint = superview?.convertPoint(point, toView: self) ?? point
        //let isInsideView = pointInside(viewPoint, withEvent: event)

        let view = super.hitTest(viewPoint, withEvent: event)

        return view
    }


    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        return CGRectContainsPoint(bounds, point)
    }
}

I keep getting the error:

fatal error: unexpectedly found nil while unwrapping an Optional value

With this line being highlighted:

testLabel.text = "test"

How do I get this to work? How can I change the text of an outlet when this callout view loads?

Upvotes: 0

Views: 194

Answers (1)

vien vu
vien vu

Reputation: 4337

You can reference to it: CustomView You can create customview with list steps below:

  • First you create subclass for custom view.
  • Click to xib file set File's Owner to this class.
  • Drage view to class and set it is contentView, drag all element you want to class too.

  • And in class add this code: 

    required init?(coder aDecoder: NSCoder) {
   super.init(coder: aDecoder)
   self.commonInit()
} 

private func commonInit() {
    NSBundle.mainBundle().loadNibNamed("CutomViewDemo", owner: self, options: nil)
    guard let content = contentView else { return }
    content.frame = self.bounds
    content.autoresizingMask = [.FlexibleHeight, .FlexibleWidth]
   self.addSubview(content)
}

Now and you can use customView. You can check my demo: Demo

Upvotes: 1

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