ios开发之swift 使用代码来自适应界面

//
//  ViewController.swift
//  kids
//
//  Created by  on 15/9/4.
//  Copyright (c) 2015年 Acrowdkids. All rights reserved.
//
 
import UIKit
 
class ViewController: UIViewController {
 
    @IBOutlet weak var wb: UIWebView!
    @IBOutlet weak var bn_blue: UIButton!
 
    @IBOutlet weak var bn_org: UIButton!
 
    @IBOutlet weak var lb_msg: UILabel!
    //var webView : UIWebView?
    override func viewDidLoad() {
        super.viewDidLoad()
 
        // Do any additional setup after loading the view, typically from a nib.
        lb_msg.text = self.view.bounds.width.description
        var width = self.view.bounds.width.description
        var height = self.view.bounds.height.description
        var fwidth = (width as NSString).floatValue
        var fheight = (height as NSString).floatValue//屏幕高度
 
        let sizew:CGFloat = CGFloat(fwidth/2)
        let posy:CGFloat = CGFloat(fheight-40)
 
        let sizewebview:CGFloat = CGFloat(fwidth)
        let posywebview:CGFloat = CGFloat(fheight-60)
 
 
        let registerBtn : UIButton = UIButton()
        registerBtn.frame = CGRectMake(0, posy, sizew, 40)
        registerBtn.backgroundColor = UIColor.orangeColor()
        registerBtn.setTitle("注册", forState: UIControlState.Normal)
        registerBtn.addTarget(self, action: "goList:", forControlEvents:UIControlEvents.TouchUpInside)
        self.view.addSubview(registerBtn)
 
        let registerBtn2 : UIButton = UIButton()
        registerBtn2.frame = CGRectMake(sizew, posy, sizew, 40)
        registerBtn2.backgroundColor = UIColor.blueColor()
        registerBtn2.setTitle("登陆", forState: UIControlState.Normal)
        registerBtn2.addTarget(self, action: "goList:", forControlEvents:UIControlEvents.TouchUpInside)
        self.view.addSubview(registerBtn2)
 
        var webView = UIWebView()
        var url = NSURL(string:http://www.111com.net)
        var urlRequest = NSURLRequest(URL:url!)
        webView.frame = CGRectMake(0, 20, sizewebview, posywebview)
        webView.loadRequest(urlRequest)
        self.view.addSubview(webView)
 
 
    }
 
    @IBAction func goList(sender: AnyObject) {
        var rootVC :ListViewController = ListViewController(nibName: "ListViewController", bundle: nil)
 
        let NVC :UINavigationController = UINavigationController(rootViewController: rootVC)
        NVC.setNavigationBarHidden(true, animated: true)
 
        self.presentViewController(NVC, animated: true, completion: nil)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
 
 
}