How to separate view from viewcontroller using storyboard swift? - swift

Question

Practicing MVC pattern and want to separate view from viewcontroller using storyboard.
in main.storyboard I have a viewcontroller, and there are some uilabels in rootview.
to separate view code from viewcontroller, I selected view from viewcontroller scene , created FruitDetailView class and subclassed it in storyboard identity inspector.
And connected UILabels to FruitDetailView class.
class FruitDetailView: UIView {
#IBOutlet weak var name: UILabel!
#IBOutlet weak var type: UILabel!
override init(frame: CGRect) {
super.init(frame: frame)
name.text = ""
type.text = ""
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func update(_ detail: Fruit) {
name.text = detail.name
type.text = detail.type
}
}
In the viewController , created FruitDetailView() instance.
And in loadview() methods, assigned fruitDetailView instance to view property.
class FruitDetailViewController: UIViewController {
private let fruitDetailView = FruitDetailViewController()
var fruit = Fruit()
override func loadView() {
view = fruitDetailView
fruitDetailView.update(fruit)
}
}
But when I run the app, app crashes with error.
How can I fix this?

Answer 1

Your problem is you want to reach your FruitDetail class created before even its properties being created. Put a breakpoint to the name.text = "" and run and you will see what i mean. To solve this just control your nil value safely :
if let label = name { // by the way consider in future to assign values like nameLabel rather than name
name.text = "put your string value"
}