Created
April 28, 2018 15:18
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Extension for help build constraints without storyboard and libs
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| // | |
| // Created by Douglas Mendes on 4/18/18. | |
| // Copyright (c) 2018 Douglas Mendes. All rights reserved. | |
| // | |
| import UIKit | |
| extension UIView { | |
| @discardableResult | |
| func startAnchor() -> Self { | |
| translatesAutoresizingMaskIntoConstraints = false | |
| return self | |
| } | |
| @discardableResult | |
| func anchorToFit(in view: UIView, constant: CGFloat = 0) -> Self { | |
| return startAnchor().trailingAnchor(to: view, constant: -constant) | |
| .leadingAnchor(to: view, constant: constant) | |
| .bottomAnchor(to: view, constant: -constant) | |
| .topAnchor(to: view, constant: constant) | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func widthAnchor(equalToConstant constant: CGFloat) -> Self { | |
| safeAreaLayoutGuide.widthAnchor.constraint(equalToConstant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func heightAnchor(equalToConstant constant: CGFloat) -> Self { | |
| safeAreaLayoutGuide.heightAnchor.constraint(equalToConstant: constant).isActive = true | |
| return self | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func centerYAnchor(toEqualAnchor anchor: NSLayoutYAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.centerYAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func centerXAnchor(toEqualAnchor anchor: NSLayoutXAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.centerXAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func topAnchor(toEqualAnchor anchor: NSLayoutYAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.topAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func topAnchor(to view: UIView, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: constant).isActive = true | |
| return self | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func leadingAnchor(to view: UIView, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func leadingAnchor(toEqualAnchor anchor: NSLayoutXAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.leadingAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func trailingAnchor(to view: UIView, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func trailingAnchor(toEqualAnchor anchor: NSLayoutXAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.trailingAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| } | |
| extension UIView { | |
| @discardableResult | |
| func bottomAnchor(toEqualAnchor anchor: NSLayoutYAxisAnchor, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.bottomAnchor.constraint(equalTo: anchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func bottomAnchor(to view: UIView, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: constant).isActive = true | |
| return self | |
| } | |
| @discardableResult | |
| func bottomAnchor(lessThanOrEqualTo view: UIView, constant: CGFloat = 0) -> Self { | |
| safeAreaLayoutGuide.bottomAnchor.constraint(lessThanOrEqualTo: view.safeAreaLayoutGuide.bottomAnchor, constant: constant).isActive = true | |
| return self | |
| } | |
| } |
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