ios PageControl and UIScrollView

//

//  AlbumViewController.m

//  HwangKop08.18

//

//  Created by rimi on 15/8/20.

//  Copyright (c) 2015年 rimi. All rights reserved.

//

#import "AlbumViewController.h"

#define IMAGE_COUNT 3

@interface AlbumViewController () <UIScrollViewDelegate>

{

NSTimer *_timer;

}

@property (nonatomic, strong) UIScrollView *scrollView;

@property (nonatomic, strong) UIPageControl *pageControl;

@property (nonatomic, strong) NSMutableArray *imageNameArray;

@property (nonatomic, strong) NSMutableArray *imageViewArray;

@property (nonatomic, assign) NSInteger currentIndex;

- (void)initDataSource;

- (void)initUserInterface;

@end

@implementation AlbumViewController

- (void)viewDidLoad {

[super viewDidLoad];

[self initDataSource];

[self initUserInterface];

}

- (void)initDataSource {

self.currentIndex = 0;

self.imageNameArray = [[NSMutableArray alloc] init];

self.imageViewArray = [[NSMutableArray alloc] init];

for (int i = 0; i < 8; i ++) {

NSString *name = [NSString stringWithFormat:@"%d.png", i];

[self.imageNameArray addObject:name];

}

}

- (void)initUserInterface {

//关闭自适应scrollView边界

self.automaticallyAdjustsScrollViewInsets = NO;

UIScrollView * scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];

scrollView.delegate = self;

scrollView.backgroundColor = [UIColor orangeColor];

//设置内容大小

scrollView.contentSize = CGSizeMake(IMAGE_COUNT * CGRectGetWidth(scrollView.bounds), CGRectGetHeight(scrollView.bounds));

//设置偏移量

scrollView.contentOffset = CGPointMake(CGRectGetWidth(self.view.bounds), 0);

//开启分页

scrollView.pagingEnabled = YES;

[self.view addSubview:scrollView];

self.scrollView = scrollView;

//添加子视图

for (int i = 0; i < IMAGE_COUNT; i ++) {

CGFloat width = CGRectGetWidth(self.view.bounds);

CGFloat height = CGRectGetHeight(self.view.bounds);

CGFloat x = i * width;

//创建图片视图

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(x, 0, width, height)];

[scrollView addSubview:imageView];

[self.imageViewArray addObject:imageView];

}

[self dynamicLoadImage];

#pragma mark -- UIPageControl

    //创建pageControl

    UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 200, 375, 50)];

    //设置pageControl的页数（是个小圆点）

    pageControl.numberOfPages = 8;

    //配置颜色 当前选中颜色和没有选中颜色

    pageControl.currentPageIndicatorTintColor = [UIColor orangeColor];

    pageControl.pageIndicatorTintColor = [UIColor colorWithRed:0.443 green:0.447 blue:0.435 alpha:1.000];

    pageControl.currentPage = 0;

    //添加点击事件

    [pageControl addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged];

    self.pageControl = pageControl;

    //添加到视图

    [self.view insertSubview:self.pageControl atIndex:3];

}

#pragma mark -- PageContorl method

- (void)pageTurn:(UIPageControl *)pageControl {

    NSInteger whichPage = pageControl.currentPage;

    [UIView setAnimationDuration:0.3];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

    self.scrollView.contentOffset = CGPointMake(CGRectGetWidth(self.view.bounds) * whichPage, 0.0);

}

#pragma mark -- scrollView methods

- (void)dynamicLoadImage {

for (int i = 0; i < IMAGE_COUNT; i ++) {

NSInteger index = (i - 1 + self.currentIndex + self.imageNameArray.count) % self.imageNameArray.count;

NSString *path = [[NSBundle mainBundle] pathForAuxiliaryExecutable:self.imageNameArray[index]];

UIImage *image = [UIImage imageWithContentsOfFile:path];

[self.imageViewArray[i] setImage:image];

self.scrollView.contentOffset = CGPointMake(CGRectGetWidth(self.view.bounds), 0);

}

}

- (void)pageLeft {

self.currentIndex = (--self.currentIndex + self.imageNameArray.count) % self.imageNameArray.count;

[self dynamicLoadImage];

}

- (void)pageRight {

self.currentIndex = (++self.currentIndex + self.imageNameArray.count) % self.imageNameArray.count;

[self dynamicLoadImage];

}

#pragma mark - UIScrollViewDelegate Method

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {

    if (scrollView.contentOffset.x <=0) {

        [self pageLeft];

    } else if (scrollView.contentOffset.x >= CGRectGetWidth(scrollView.bounds) * 2) {

        [self pageRight];

    }

 self.pageControl.currentPage = self.currentIndex;

}

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {

[self pauseTimer];

}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {

[self startTimer];

}

#pragma mark -- timer methods

- (void)startTimer {

if (!_timer) {

_timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(handleTimer:) userInfo:nil repeats:YES];

}

_timer.fireDate = [NSDate dateWithTimeIntervalSinceNow:2];

}

- (void)pauseTimer {

_timer.fireDate = [NSDate distantFuture];

}

- (void)stopTimer {

[_timer invalidate];

_timer = nil;

}

- (void)handleTimer:(NSTimer *)timer {

[self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES];

}

- (void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:animated];

[self startTimer];

}

- (void)viewDidDisappear:(BOOL)animated

{

[super viewDidDisappear:animated];

[self stopTimer];

}

@end

附上demo

链接:http://pan.baidu.com/s/1nt5VzRj 密码:xmr9