This code, which loads an image… - Memory and ARC

Memory and ARC

unowned crash scenario

This code, which loads an image asynchronously in a UITableView cell, crashes now and then. Under what condition does it crash, and why?

final class ImageCell: UITableViewCell {
    func load(_ url: URL) {
        loader.fetch(url) { [unowned self] image in
            self.imageView?.image = image
        }
    }
}

Your answer

Memory and ARCShort answerBasics
When would you use unowned instead of weak?
#unowned #crash #lifetime
Memory and ARCMultiple choiceAdvanced
In which of the following is a [unowned self] capture safe? Select all that apply.
#unowned #lifetime #closure
Memory and ARCShort answerBasics
Give me a concrete code example that creates a retain cycle, and fix it.
#lifetime #closure
Memory and ARCShort answerAdvanced
A UIKit ViewController keeps an upload completion block in a property, and the block chan…
#lifetime #closure

Up next