Jeśli ktoś szuka rozwiązania Swift - stworzyłbym rozszerzenieUIView
Swift, które pomoże ci za każdym razem, gdy chcesz powiązać ramkę subviews z jej granicami superwizji:
Swift 2:
extension UIView {
func bindFrameToSuperviewBounds() {
guard let superview = self.superview else {
print("Error! `superview` was nil – call `addSubview(view: UIView)` before calling `bindFrameToSuperviewBounds()` to fix this.")
return
}
self.translatesAutoresizingMaskIntoConstraints = false
superview.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[subview]-0-|", options: .DirectionLeadingToTrailing, metrics: nil, views: ["subview": self]))
superview.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[subview]-0-|", options: .DirectionLeadingToTrailing, metrics: nil, views: ["subview": self]))
}
}
Swift 3:
extension UIView {
func bindFrameToSuperviewBounds() {
guard let superview = self.superview else {
print("Error! `superview` was nil – call `addSubview(view: UIView)` before calling `bindFrameToSuperviewBounds()` to fix this.")
return
}
self.translatesAutoresizingMaskIntoConstraints = false
superview.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[subview]-0-|", options: .directionLeadingToTrailing, metrics: nil, views: ["subview": self]))
superview.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[subview]-0-|", options: .directionLeadingToTrailing, metrics: nil, views: ["subview": self]))
}
}
Swift 4.2:
extension UIView {
func bindFrameToSuperviewBounds() {
guard let superview = self.superview else {
print("Error! `superview` was nil – call `addSubview(view: UIView)` before calling `bindFrameToSuperviewBounds()` to fix this.")
return
}
self.translatesAutoresizingMaskIntoConstraints = false
self.topAnchor.constraint(equalTo: superview.topAnchor, constant: 0).isActive = true
self.bottomAnchor.constraint(equalTo: superview.bottomAnchor, constant: 0).isActive = true
self.leadingAnchor.constraint(equalTo: superview.leadingAnchor, constant: 0).isActive = true
self.trailingAnchor.constraint(equalTo: superview.trailingAnchor, constant: 0).isActive = true
}
}
Następnie nazwij to tak :
subview.bindFrameToSuperviewBounds()