如何在没有IBOutlets的情况下访问UILabel。斯威夫特

let label = view.viewWithTag(1) as? UILabel
label?.text = "Hello World"

func findLabelInView(view: UIView) -> UILabel? {
    if let label = view as? UILabel {
        return label
    }
    
    for subview in view.subviews {
        if let label = findLabelInView(view: subview) {
            return label
        }
    }
    
    return nil
}

let label = findLabelInView(view: self.view)
label?.text = "Hello World"

@IBOutlet var labels: [UILabel]!

for label in labels {
    label.text = "Hello World"
}