Swift基础 - - StoryBoard间切换与UIScrollView控件实现图片轮播

界面切换

在项目中可以把耦合度比较高的界面放在通过一个StoryBoard中，可以按照功能使用多个StoryBoard搭建界面，这样便于项目维护以及多人开发，对于多个StoryBoard间切换，可以使用以下代码：

@IBAction func ChangeOne(sender: UIButton) {
        var oneStoryBoard:UIStoryboard = UIStoryboard(name: "One", bundle: NSBundle.mainBundle())
        let oneController:UIViewController = oneStoryBoard.instantiateViewControllerWithIdentifier("oneId") as UIViewController
        self.navigationController?.pushViewController(oneController, animated: true)
    }

需要说明的是上面的"One"是One.storyboard，"oneId"是下图中的Storyboard ID

还有一个需要注意的就是切换界面的主界面必须是Navigation Contoller

UIScrollView实现图片轮播

//
//  Two.swift
//  MultStoryBoardChanged
//
//  Created by System Administrator on 15/2/6.
//  Copyright (c) 2015年 jwzhangjie. All rights reserved.
//
import UIKit
class Two: UIViewController, UIScrollViewDelegate{

    @IBOutlet weak var scrollview: UIScrollView!

    @IBOutlet weak var pageControl: UIPageControl!

    var timer:NSTimer!

    override func viewDidLoad() {
        super.viewDidLoad();
        //image width
        let imageW:CGFloat = self.scrollview.frame.size.width;
        let imageH:CGFloat = self.scrollview.frame.size.height;
        var imageY:CGFloat = 0;
        var totalCount:NSInteger = 5;
        for index in 0..<totalCount{
            var imageView:UIImageView = UIImageView();
            let imageX:CGFloat = CGFloat(index) * imageW;
            imageView.frame = CGRectMake(imageX, imageY, imageW, imageH);
            let name:NSString = NSString(format: "image_0%d", index+1);
            imageView.image = UIImage(named: name);
            self.scrollview.showsHorizontalScrollIndicator = false;
            self.scrollview.addSubview(imageView);
        }
        let contentW:CGFloat = imageW * CGFloat(totalCount);
        self.scrollview.contentSize = CGSizeMake(contentW, 0);
        self.scrollview.pagingEnabled = true;
        self.scrollview.delegate = self;

self.pageControl.numberOfPages = totalCount;
        self.addTimer()
    }

    func nextImage(sender:AnyObject!){
        var page:Int = self.pageControl.currentPage;
        if(page == 4){
            page = 0;
        }else{
            ++page;
        }
        let x:CGFloat = CGFloat(page) * self.scrollview.frame.size.width;
        self.scrollview.contentOffset = CGPointMake(x, 0);
    }

    func scrollViewDidScroll(scrollView: UIScrollView) {
        let scrollviewW:CGFloat = scrollview.frame.size.width;
        let x:CGFloat = scrollview.contentOffset.x;
        let page:Int = (Int)((x + scrollviewW / 2) / scrollviewW);
        self.pageControl.currentPage = page;
    }

    func scrollViewWillBeginDragging(scrollView: UIScrollView) {
        self.removeTimer();
    }

    func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
        self.addTimer();
    }

    func addTimer(){
        self.timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "nextImage:", userInfo: nil, repeats: true);
        NSRunLoop.currentRunLoop().addTimer(self.timer, forMode: NSRunLoopCommonModes);
    }

    func removeTimer(){
        self.timer.invalidate();
    }
}

需要注意的是XCode6.1里面

for index in 0..<totalCount{
0..<是半区间，包头不包尾    ...全区间