Swift UI学习之基础：UIButton,UILabel and UISlider

来源：互联网发布：个人展示网站源码编辑：程序博客网时间：2024/05/16 14:33
//  http://blog.csdn.net/woaifen3344/article/details/29840275    //  RootViewController.swift  //  UIDemos  //  //  Created by sixiaobo on 14-6-10.  //  Copyright (c) 2014年 com.huangyibiao. All rights reserved.  //    import Foundation  import UIKit    class RootViewController : UIViewController, UIAlertViewDelegate {      var _label: UILabel? // optional type, must type var            func originX() -> CGFloat {          let version: String = UIDevice.currentDevice().systemVersion          return version >= "7.0" ? 64.0 : 0.0      }                //      // 重载需要使用关键字override      override func viewDidLoad() {          super.viewDidLoad() // 先调用父类的                 //          // @name create button          println(self.originX())          let button = UIButton(frame: CGRectMake(30, self.originX() + 30, 100, 30))          button.setTitle("button", forState:UIControlState.Normal)          button.backgroundColor = UIColor.blackColor()          button.setTitleColor(UIColor.whiteColor(), forState:.Normal)          // add an action          button.addTarget(self, action: "onButtonClick:", forControlEvents: UIControlEvents.TouchUpInside)          self.view.addSubview(button)          // @} end create button                    //          // @name create label          _label = UILabel(frame: CGRectMake(30, self.originX() + 70, 100, 60))          _label!.text = "label"          _label!.backgroundColor = UIColor.clearColor()          _label!.textColor = UIColor.redColor()          // use NSTextAlignment          _label!.textAlignment = NSTextAlignment.Center          self.view.addSubview(_label!)          // @} end create label                    //          // @name create UISlider          let slider = UISlider(frame: CGRectMake(30, self.originX() + 130, 60, 30))          slider.addTarget(self, action: "clickSlider:", forControlEvents: .ValueChanged)          slider.minimumValue = 17.0          slider.maximumValue = 36.0          self.view.addSubview(slider)          // @} end create UISlider      }            func onButtonClick(sender: UIButton!) {         // UIAlertController.showAlert(self, title: "title", message: "message")         // UIAlertController.showAlert(self, title: "title", message: "message", cancelButtonTitle: "cancel", okButtonTitle: "ok")          UIAlertController.showAlert(self, title: "title", message: "message", cancelButtonTitle: "cancel", okButtonTitle: "ok", okHandler: {              (UIAlertAction) in              println("no nothing")          })      }            func alertView(alertView: UIAlertView!, clickedButtonAtIndex buttonIndex: Int) {          println("clicked button at index: \(buttonIndex)")      }            func clickSlider(sender: UISlider!) {          _label!.font = UIFont.systemFontOfSize(sender.value)      }  }
0 0