Lets you adjust individual property of a UIView's frame. Based on the category UIView+position.m by Tyler Neylon.

UIView

import UIKit

public extension UIView {

    public var top: CGFloat {
        get { return self.frame.origin.y }
        set { self.frame.origin.y = newValue }
    }
    public var left: CGFloat {
        get { return self.frame.origin.x }
        set { self.frame.origin.x = newValue }
    }
    // swiftlint:disable:next identifier_name
    public var x: CGFloat {
        get { return self.frame.origin.x }
        set { self.frame.origin.x = newValue }
    }
    // swiftlint:disable:next identifier_name
    public var y: CGFloat {
        get { return self.frame.origin.y }
        set { self.frame.origin.y = newValue }
    }
    public var width: CGFloat {
        get { return self.frame.size.width }
        set { self.frame.size.width = newValue }
    }
    public var height: CGFloat {
        get { return self.frame.size.height }
        set { self.frame.size.height = newValue }
    }
    public var right: CGFloat {
        get { return self.frame.origin.x + self.width }
        set { self.frame.origin.x = newValue - self.width }
    }
    public var bottom: CGFloat {
        get { return self.frame.origin.y + self.height }
        set { self.frame.origin.y = newValue - self.height }
    }
    public var centerX: CGFloat {
        get { return self.center.x }
        set { self.center = CGPoint(x: newValue, y: self.centerY) }
    }
    public var centerY: CGFloat {
        get { return self.center.y }
        set { self.center = CGPoint(x: self.centerX, y: newValue) }
    }
    public var origin: CGPoint {
        set { self.frame.origin = newValue }
        get { return self.frame.origin }
    }
    public var size: CGSize {
        set { self.frame.size = newValue }
        get { return self.frame.size }
    }
}