UIViewExtension.swift

UIViewExtension.swift

//
//  UIViewExtensions.swift
//  
//

import Foundation
import UIKit

extension UIView {
    
    func anchor(top: NSLayoutYAxisAnchor?, leading: NSLayoutXAxisAnchor?, bottom: NSLayoutYAxisAnchor?, trailing: NSLayoutXAxisAnchor?, padding: UIEdgeInsets = .zero, size: CGSize = .zero) {
        
        translatesAutoresizingMaskIntoConstraints = false
        
        if let top = top {
            self.topAnchor.constraint(equalTo: top, constant: padding.top).isActive = true
        }
        
        if let leading = leading {
            self.leadingAnchor.constraint(equalTo: leading, constant: padding.left).isActive = true
        }
        
        if let bottom = bottom {
            self.bottomAnchor.constraint(equalTo: bottom, constant: -padding.bottom).isActive = true
        }
        
        if let trailing = trailing {
            self.trailingAnchor.constraint(equalTo: trailing, constant: -padding.right).isActive = true
        }
        
        if size.width != 0 {
            self.widthAnchor.constraint(equalToConstant: size.width).isActive = true
        }
        
        if size.height != 0 {
            self.heightAnchor.constraint(equalToConstant: size.height).isActive = true
        }
        
    }
    
    func fillSuperview(padding: UIEdgeInsets = .zero) {
        translatesAutoresizingMaskIntoConstraints = false
        if let superviewTopAnchor = superview?.topAnchor {
            topAnchor.constraint(equalTo: superviewTopAnchor, constant: padding.top).isActive = true
        }
        
        if let superviewBottomAnchor = superview?.bottomAnchor {
            bottomAnchor.constraint(equalTo: superviewBottomAnchor, constant: -padding.bottom).isActive = true
        }
        
        if let superviewLeadingAnchor = superview?.leadingAnchor {
            leadingAnchor.constraint(equalTo: superviewLeadingAnchor, constant: padding.left).isActive = true
        }
        
        if let superviewTrailingAnchor = superview?.trailingAnchor {
            trailingAnchor.constraint(equalTo: superviewTrailingAnchor, constant: -padding.right).isActive = true
        }
    }
    
}