xcode读取ios配置信息

import UIKit

import Foundation

class ViewController: UIViewController {

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        

        

        let rect = CGRect(x:30,y:50,width:200,height:200)

        let view = UIView(frame:rect)

        view.backgroundColor = UIColor.brown

        self.view.addSubview(view)

        

        let btAdd = UIButton(frame:CGRect(x:30,y:350,width:80,height:30))

        btAdd.backgroundColor = UIColor.gray

        btAdd.setTitle("Add", for:UIControlState())

        btAdd.addTarget(self, action:#selector(ViewController.addView(_:)),for:UIControlEvents.touchUpInside)

        self.view.addSubview(btAdd)

        

        let btBack = UIButton(frame:CGRect(x:120,y:350,width:80,height:30))

        btBack.backgroundColor = UIColor.gray

        btBack.setTitle("Switch", for: UIControlState())

        btBack.addTarget(self, action:#selector(ViewController.bringViewBack(_:)),for:UIControlEvents.touchUpInside)

        self.view.addSubview(btBack)

        

        let btRemove = UIButton(frame:CGRect(x:210,y:350,width:80,height:30))

        btRemove.backgroundColor = UIColor.gray

        btRemove.setTitle("Remove", for: UIControlState())

        btRemove.addTarget(self, action:#selector(ViewController.removeView(_:)),for:UIControlEvents.touchUpInside)

        self.view.addSubview(btRemove)}

    

    @objc func addView(_ sender:UIButton!)

    {let rect = CGRect(x:60,y:90,width:200,height:200)

        let view = UIView(frame:rect)

        view.backgroundColor = UIColor.purple

        view.tag = 1;

        

        self.view.addSubview(view)

        

    }

    @objc func bringViewBack(_ sender:UIButton!)

    {let view = self.view.viewWithTag(1)

        self.view.sendSubview(toBack:view!)

    }

    @objc func removeView(_ sender:UIButton!)

    {let view = self.view.viewWithTag(1)

        view?.removeFromSuperview()}

    

        

        

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

        

    }