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iOS Intermediate Swift Properties Property Observers

Posted by amit singh
amit singh
4,968 Points

what is the correct answer to property observer code challenge for Xcode, in editor my code works fine

import PlaygroundSupport import UIKit

class TemperatureController: UIViewController { var temperature: Double = 0.0 { didSet { if (temperature > 80.0) { view.backgroundColor = .red } else if (temperature < 40.0) { view.backgroundColor = .blue } else { view.backgroundColor = .green } } }

init(temperature: Double) {
    self.temperature = temperature
    super.init(nibName: nil, bundle: nil)
}
convenience init(){
    self.init(temperature: 0)
}




required  init?(coder aDecoder: NSCoder) {

super.init(coder: aDecoder)

}


override func  viewDidLoad() {
     super.viewDidLoad()
    view.backgroundColor = .green
}

}

var tempController = TemperatureController(temperature: 90.0) PlaygroundPage.current.liveView = tempController.view

observer.swift 
class TemperatureController: UIViewController {
    var temperature: Double

    init(temperature: Double) {
        self.temperature = temperature
        super.init()
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
    }
}