L'Etiquette 11 déplace légèrement l'étiquette principale par le haut plutôt que de la maintenir en haut. Le problème se produit uniquement sur IOS 11. Avec différents IOS tout semble ok.IOS 11 uniquement: Etiquette de la barre de navigation désactivée
Exemple de codeavec un en-tête de réglage:
private func setHeader(agentName: String = "", isTyping: Bool = false) -> Void {
if (agentName.isEmpty) {
self.containerViewController?.navigationItem.titleView = nil
} else {
let headerView: UIView = {
let rect = CGRect(x: 0, y: 0, width: 320, height: 44)
let uiview = UIView(frame: rect)
return uiview
}()
let headerLabel: UILabel = {
let label = UILabel(frame: CGRect(x: 0, y: 0, width: headerView.frame.width, height: 20))
label.font = UIFont.systemFont(ofSize: 18)
label.textAlignment = .center
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let subheaderLabel: UILabel = {
let label = UILabel(frame: CGRect(x: 0, y: 0, width: headerView.frame.width, height: 12))
label.font = UIFont.systemFont(ofSize: 12)
label.translatesAutoresizingMaskIntoConstraints = false
label.text = self.title
return label
}()
headerView.addSubview(headerLabel)
headerView.addSubview(subheaderLabel)
let viewsDictionary = ["header": headerLabel, "subheader": subheaderLabel]
headerView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[header]|", options: NSLayoutFormatOptions(), metrics: nil, views: viewsDictionary))
headerView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[subheader]|", options: NSLayoutFormatOptions(), metrics: nil, views: viewsDictionary))
headerView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[header(20)]-[subheader]", options: [], metrics: nil, views: viewsDictionary))
self.containerViewController?.navigationItem.titleView = headerView
}
}