ImageSwitcher.h

//
//  ImageSwitcher.h
//
//  Created by syxc on 02/25/13.
//  Copyright (c) 2013 Straw. All rights reserved.
//

@interface ImageSwitcher : UIView <UIScrollViewDelegate> {
    CGRect viewSize;
    UIScrollView *scrollView;
    UIPageControl *pageControl;
    NSArray *imageArray;
    NSUInteger pageCount;
    int switchSpeed; // 滚动速率
    int currentAD;
}

- (id)initWithFrameRect:(CGRect)rect ImageArray:(NSArray *)array Speed:(int *)speed;

@end

ImageSwitcher.m

//
//  ImageSwitcher.m
//
//  Created by syxc on 02/25/13.
//  Copyright (c) 2013 Straw. All rights reserved.
//

#import "ImageSwitcher.h"

@implementation ImageSwitcher

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {

    }

    return self;
}

- (id)initWithFrameRect:(CGRect)rect ImageArray:(NSArray *)array Speed:(int *)speed {
    if ((self = [super initWithFrame:rect])) {
        viewSize = rect;
        imageArray = array;
        switchSpeed = speed;
        [self setFrame:viewSize];
        [self setupImageSwitch];
        [NSTimer scheduledTimerWithTimeInterval:switchSpeed target:self selector:@selector(scrollingTimer) userInfo:nil repeats:YES];
    }
    return self;
}

#pragma mark private Method

- (void)setupImageSwitch {
    NSLog(@"-- setupImageSwitch");
    currentAD = 0;
    pageCount = [imageArray count];
    scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, viewSize.size.width, viewSize.size.height)];
    scrollView.pagingEnabled = YES;
    scrollView.contentSize = CGSizeMake(viewSize.size.width * pageCount, viewSize.size.height);
    scrollView.showsHorizontalScrollIndicator = NO;
    scrollView.showsVerticalScrollIndicator = NO;
    scrollView.scrollsToTop = NO;
    scrollView.delegate = self;
    for (int i = 0; i < pageCount; i++) {
        UIImage *img = [imageArray objectAtIndex:i];
        UIImageView *imgView = [[UIImageView alloc] initWithImage:img];
        [imgView setFrame:CGRectMake(viewSize.size.width * i, 0, viewSize.size.width, viewSize.size.height)];
        imgView.contentMode = UIViewContentModeScaleToFill;
        imgView.tag = i;
        UITapGestureRecognizer *Tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imagePressed:)];
        [Tap setNumberOfTapsRequired:1];
        [Tap setNumberOfTouchesRequired:1];
        imgView.userInteractionEnabled = YES;
        [imgView addGestureRecognizer:Tap];
        [scrollView addSubview:imgView];
    }
    [self addSubview:scrollView];
    float pageControlWidth = pageCount * 10.0f + 50.f;
    float pagecontrolHeight = 20.0f;
    pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake((viewSize.size.width - pageControlWidth) / 2, viewSize.size.height - pagecontrolHeight, pageControlWidth, pagecontrolHeight)];
    pageControl.currentPage = 1;
    pageControl.numberOfPages = pageCount;
    pageControl.autoresizingMask = UIViewAutoresizingNone;
    [pageControl setBackgroundColor:[UIColor darkGrayColor]];
    [pageControl setAlpha:0.8];
    [pageControl setUserInteractionEnabled:NO];
    [self addSubview:pageControl];
}

- (void)imagePressed:(UITapGestureRecognizer *)sender {
    NSLog(@"imagePressed: %d", sender.view.tag);
}

- (void)scrollingTimer {
    currentAD++;
    if (currentAD >= pageCount) {
        currentAD = 0;
        [scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
    }
    [scrollView setContentOffset:CGPointMake(currentAD * self.frame.size.width, 0) animated:YES];
}

#pragma mark - UIScrollViewDelegate

- (void)scrollViewDidScroll:(UIScrollView *)sender {
    // TODO: page圆点自动与手动滑动的同步处理
    CGFloat pageWidth = scrollView.frame.size.width;
    const int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    pageControl.currentPage = page;
}

@end

使用：

- (void)viewDidLoad {
    [super viewDidLoad];
    UIImage *img1 = [UIImage imageNamed:@"1.png"];
    UIImage *img2 = [UIImage imageNamed:@"2.png"];
    UIImage *img3 = [UIImage imageNamed:@"3.png"];
    UIImage *img4 = [UIImage imageNamed:@"4.png"];
    UIImage *img5 = [UIImage imageNamed:@"5.png"];
    NSMutableArray *imgArray = [NSMutableArray arrayWithObjects:img1, img2, img3, img4, img5, nil];

    imgSwitch = [[ImageSwitcher alloc] initWithFrameRect:CGRectMake(10, 10, 300, 200) ImageArray:imgArray Speed:3];
    [self.view addSubview:imgSwitch];
}