iOS ) Storyboard없이 레이아웃 꾸밀때 constraint 작업 편하게 해주는 메서드

1. 코드

extension UIView {
    
    func anchor(top: NSLayoutYAxisAnchor? = nil, left: NSLayoutXAxisAnchor? = nil, bottom: NSLayoutYAxisAnchor? = nil, right: NSLayoutXAxisAnchor? = nil, paddingTop: CGFloat? = 0,
                paddingLeft: CGFloat? = 0, paddingBottom: CGFloat? = 0, paddingRight: CGFloat? = 0, width: CGFloat? = nil, height: CGFloat? = nil) {
        
        translatesAutoresizingMaskIntoConstraints = false
        
        if let top = top {
            topAnchor.constraint(equalTo: top, constant: paddingTop!).isActive = true
        }
        
        if let left = left {
            leftAnchor.constraint(equalTo: left, constant: paddingLeft!).isActive = true
        }
        
        if let bottom = bottom {
            if let paddingBottom = paddingBottom {
                bottomAnchor.constraint(equalTo: bottom, constant: -paddingBottom).isActive = true
            }
        }
        
        if let right = right {
            if let paddingRight = paddingRight {
                rightAnchor.constraint(equalTo: right, constant: -paddingRight).isActive = true
            }
        }
        
        if let width = width {
            widthAnchor.constraint(equalToConstant: width).isActive = true
        }
        
        if let height = height {
            heightAnchor.constraint(equalToConstant: height).isActive = true
        }
    }
}

2. 사용 예시

UIViewObject.anchor(top: wirtetextField.bottomAnchor, left: view.leftAnchor, right: view.rightAnchor,paddingTop: 20, paddingLeft: 10, paddingRight: 10, height: 40)