I'm tired to write more frame.origin.x/y or frame.size.width/height.

ViewExtension.swift

//
//  ViewExtension.swift
//  Rina
//
//  Created by Joe Wang on 02/07/2018.
//  License: WTFPL
//

import UIKit

extension UIView {
    
    var x:CGFloat {
        get {
            return frame.origin.x
        }
        set {
            frame = CGRect(x: newValue, y: y, width: width, height: height)
        }
    }
    
    var y:CGFloat {
        get {
            return frame.origin.y
        }
        set {
            frame = CGRect(x: x, y: newValue, width: width, height: height)
        }
    }
    
    var width:CGFloat {
        get {
            return frame.size.width
        }
        set {
            frame = CGRect(x: x, y: y, width: newValue, height: height)
        }
    }
    
    
    var height:CGFloat {
        get {
            return frame.size.height
        }
        set {
            frame = CGRect(x: x, y: y, width: width, height: newValue)
        }
    }
    
    func getRelativeX(_ offset:CGFloat = 0 ) -> CGFloat {
        return frame.origin.x + frame.width + offset
    }
    
    func getRelativeY(_ offset:CGFloat = 0 ) -> CGFloat {
        return frame.origin.y + frame.height + offset
    }
    
    func getCenterX(_ width:CGFloat, _ offset:CGFloat = 0 ) -> CGFloat {
        return (width - frame.width) / 2 + offset
    }
    
    func getCenterY(_ height:CGFloat, _ offset:CGFloat = 0 ) -> CGFloat {
        return (height - frame.height) / 2 + offset
    }
    
}