Swift 图片轮播图

来源：互联网发布：梦龙网络计划编制软件编辑：程序博客网时间：2024/06/05 06:23

每天在公司实习学习，公司需要用Swift，所以开始接触Swift，决定把自己每天学到的知识记录下来，新手初探，欢迎指正和交流

import UIKit

class HomeViewController: UIViewController,UIScrollViewDelegate {

／／定义需要的控件1.UIPageControl2.UIScrollViewvar pageControl = UIPageControl()var scrollView=UIScrollView()override func viewDidLoad() {    super.viewDidLoad()   self.view.backgroundColor=UIColor.orangeColor()    self.title="首页"    //定时器：用于自动切换图片（每隔三秒）     NSTimer.scheduledTimerWithTimeInterval(3.0, target: self, selector: #selector(HomeViewController.pageNumberChanged(_:)), userInfo: nil, repeats: true)

／／ScrollView的初始化
scrollView=UIScrollView(frame:CGRectMake(0, 0, view.bounds.size.width, 200))

    scrollView.backgroundColor=UIColor.blackColor()    scrollView.showsHorizontalScrollIndicator=false    scrollView.showsVerticalScrollIndicator=false    ／／代理    scrollView.delegate=self    creatPageControl()／／在ScrollView上添加三张图片        //let imageV=UIImageView(image: UIImage(named: "scroll.jpg"))    let image1=UIImageView(image: UIImage(named: "scroll.jpg"))    let image2=UIImageView(image: UIImage(named: "2222.jpg"))    let image3=UIImageView(image: UIImage(named: "333.jpg"))／／三张图片一次排列到ScrollView上        image1.frame=CGRectMake(0, 0, SCREEN_WIDTH, scrollView.frame.size.height)    image2.frame=CGRectMake(SCREEN_WIDTH, 0, SCREEN_WIDTH, scrollView.frame.size.height)    image3.frame=CGRectMake( SCREEN_WIDTH*2, 0,  SCREEN_WIDTH, scrollView.frame.size.height)  ／／ScrollView可以滑动的内容大小    scrollView.contentSize.width=image1.bounds.size.width*3    scrollView.contentSize.height=scrollView.bounds.size.height

／／是否允许分页
scrollView.pagingEnabled=true

    scrollView.addSubview(image1)    scrollView.addSubview(image2)    scrollView.addSubview(image3)    self.view.addSubview(scrollView)}func pageNumberChanged(sender : AnyObject){    //        判断如果页数为最后一页，就从头开始    if self.pageControl.currentPage == self.pageControl.numberOfPages - 1 {        self.pageControl.currentPage = 0    }        //        依次往后滚动视图    else{        self.pageControl.currentPage += 1    }    //        设置图片显示    let page : CGFloat = (CGFloat)((self.pageControl.currentPage))    let x = page * (self.scrollView.frame.width)    self.scrollView.contentOffset = CGPointMake(x, 0);}func creatPageControl(){    //        创建分页控制器   self.pageControl = UIPageControl(frame: CGRectMake(150, 200, 100, 20))    //        设置分页的页码数和当前页码   self.pageControl.numberOfPages = 3;   self.pageControl.currentPage = 0;    //        设置选中页码点的颜色和未选中页码点的颜色    self.pageControl.currentPageIndicatorTintColor = UIColor.blackColor()    self.pageControl.pageIndicatorTintColor = UIColor.grayColor()    //        将分页控制器添加到滚动视图中   self.view.addSubview(self.pageControl)}override func didReceiveMemoryWarning() {    super.didReceiveMemoryWarning()    // Dispose of any resources that can be recreated.}

}

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