@H_404_3@import UIKit

@H_404_3@import Swift

@H_404_3@class ViewController: UIViewController {

@H_404_3@override @H_404_3@func viewDidLoad() {

@H_404_3@super.viewDidLoad()

@H_404_3@let v1 = UIView()

@H_404_3@let v2 = UIView()

v1.backgroundColor = UIColor.redColor()

v2.backgroundColor = UIColor.blueColor()

//遵循autolayout抛弃原有的宽和高

v1.translatesAutoresizingMaskIntoConstraints = @H_404_3@true

v2.translatesAutoresizingMaskIntoConstraints = @H_404_3@false

view.addSubview(v1)

view.addSubview(v2)

//item1 =(>=,<=) item2*multiplier + constant

//如果是一元约束的话就是，只针对自己的约束，如果是二元约束的话就必须添加在他们最近的共同父视图上

//set v1's height and width

v1.addConstraint(NSLayoutConstraint(item: v1,attribute: .Width,relatedBy: .Equal,toItem: @H_404_3@ nil,attribute: .NotAnAttribute,multiplier: @H_404_3@1,constant: @H_404_3@100))//v1 = m*0 + constant

//v1.addConstraint(NSLayoutConstraint(item: v1,attribute: .Height,relatedBy: .Equal,toItem: nil,attribute: .NotAnAttribute,multiplier: 1,constant: 100))

//set relationship between topView and v1

view.addConstraint(NSLayoutConstraint(item: v1,attribute: .Left,toItem: view,attribute: .Leading,constant: @H_404_3@20))

view.addConstraint(NSLayoutConstraint(item: v1,attribute: .CenterY,constant: @H_404_3@0))

//set v2's height and width

view.addConstraint(NSLayoutConstraint(item: v2,toItem: v1,multiplier: @H_404_3@ 1,constant: @H_404_3@0))

view.addConstraint(NSLayoutConstraint(item: v2,attribute: .Height,36)"> //set relationship between v1 and v2

view.addConstraint(NSLayoutConstraint(item: v2,attribute: .Right,constant: @H_404_3@100))

view.addConstraint(NSLayoutConstraint(item: v1,toItem: v2,constant: @H_404_3@0))

}

@H_404_3@override @H_404_3@func didReceiveMemoryWarning() {

@H_404_3@super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}