How to animate a UIView from within a class file?

Question

I am working on an application where the user clicks to add a station, from there a pop-up window will appear asking the user for the appropriate information, the UIView will be animated but I am having trouble getting it to work from insides its separate file.

Here is the code from the Animations.swift file.

import Foundation
import UIKit

class Animations: UIView {

    func animatePopUpIn(view: UIView, controller: UIViewController) {

        controller.view.addSubview(view)
        view.center = center

        view.transform = CGAffineTransform.init(scaleX: 1.3, y: 1.3)
        view.alpha = 0

        UIView.animate(withDuration: 0.4) {
            controller.view.alpha = 1
            controller.view.transform = CGAffineTransform.identity
        }

    }

}

Here is the code for the StationController.swift file.

import UIKit

class StationController: UIViewController {

    @IBOutlet var addStationView: UIView!
    var animation = Animations()


    override func viewDidLoad() {
        super.viewDidLoad()

        navigationItem.title = "Stations"
    }

    @IBAction func addStationTapped(_ sender: Any) {

        animation.animatePopUpIn(view: addStationView, controller: self)
        print("Displayed Pop Up")
    }


    @IBAction func dismissPopUpTapped(_ sender: Any) {


    }


}

For some reason upon tapping addStationTapped nothing appears, any help would be great for I am fairly new to working with classes in this manner. Thanks in advance.

What size does view (presented) have? How do you create it in IB? I'm almost sure it has zero-size. — Timur Bernikovich, May 22 '17 at 16:26
You can use new Xcode tool for UI debugging - view hierarchies. — Timur Bernikovich, May 22 '17 at 16:27
There are several times when I will be needing to animate a popup. I would rather have some sort of class or function that does it automatically by passing in the appropriate parameters that way I don't have to rewrite the same code over and over again — Chandler Long, May 22 '17 at 16:32
As for the size of the view, It is sized inside of the main storyboard. I created the outlet addStationView to reference that. — Chandler Long, May 22 '17 at 16:33
You can create `static func` in `Animations` or extension for `UIView` or `UIViewController` in this case. — Timur Bernikovich, May 22 '17 at 16:34
Can you place breakpoint before `UIView.animatite()` func and check size there? — Timur Bernikovich, May 22 '17 at 16:35
Post about better UI debug: https://stackoverflow.com/a/26052806/1980246 — Timur Bernikovich, May 22 '17 at 16:38
Center position and white background color, but it has elements inside it such as a label and UITextField — Chandler Long, May 22 '17 at 16:47
first of all you should change background colors to make it more visible. Use red for example. — Timur Bernikovich, May 22 '17 at 16:48

score 0 · Answer 1 · answered May 22 '17 at 17:48

0

One more better way is to do this is by making seperate viewcontroller and add it as popover . you can use third party class or manually add view controller as pop . if you want to add it manually then i can help.

answered May 22 '17 at 17:48

Jitendra Tanwar

249
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How to animate a UIView from within a class file?

1 Answers1