SnapKitExample.swift

let view1 = UIView()
view1.backgroundColor = UIColor.systemIndigo
view.addSubview(view1)

view1.snp.makeConstraints { make in
    make.top.equalToSuperview().offset(250)
    make.leading.equalToSuperview().offset(20)
    make.width.height.equalTo(view.snp.width)
        .dividedBy(2).offset(-30)
}

let view2 = UIView()
view2.backgroundColor = UIColor.systemPink
view.addSubview(view2)

view2.snp.makeConstraints { make in
    make.centerY.equalTo(view1)
    make.leading.equalTo(view1.snp.trailing).offset(20)
    make.width.height.equalTo(view1)
}