UIScrollView和UIPageController

//
//  ViewController.m
//  UIpageControl
//
//  Created by dllo on 16/3/10.
//  Copyright © 2016年 dllo. All rights reserved.
//

#import "ViewController.h"
#define WIDTH self.view.frame.size.width
#define HEIGHT self.view.frame.size.height

@interface ViewController ()<UIScrollViewDelegate>

@property (nonatomic, retain)UIScrollView *scrollView;
@property (nonatomic, retain)UIPageControl *pageControl;
@property (nonatomic, retain)UILabel *titleLabel;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor yellowColor];
    self.pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(100, 550, 200, 30)];
    self.pageControl.backgroundColor = [UIColor redColor];
    [self.view addSubview:self.pageControl];
    [self.pageControl release];
    self.pageControl.numberOfPages = 7;
    self.pageControl.pageIndicatorTintColor = [UIColor grayColor];
    self.pageControl.currentPageIndicatorTintColor = [UIColor cyanColor];
    [self.pageControl addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];
    
    
    self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0,WIDTH, 500)];
    [self.view addSubview:self.scrollView];
    [self.scrollView release];
    self.scrollView.contentSize = CGSizeMake(WIDTH * 9, 500);
    
    for (NSInteger i = 0; i < 7; i++) {
        UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(WIDTH * i + WIDTH , 0, WIDTH, HEIGHT)];
        imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"h%ld.jpeg", i]];
        [self.scrollView addSubview:imageView];
    }
    UIImageView *firstImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
    firstImageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"h6.jpeg"]];
    [self.scrollView addSubview:firstImageView];
    [firstImageView release];
    
    UIImageView *lastImageView = [[UIImageView alloc]initWithFrame:CGRectMake(WIDTH * 8, 0, WIDTH, HEIGHT)];
    lastImageView.image = [UIImage imageNamed:@"h0.jpeg"];
    [self.scrollView addSubview:lastImageView];
    [lastImageView release];
    
    //创建label
    self.titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(130, 600, 150, 50)];
    [self.view addSubview:self.titleLabel];
    [_titleLabel release];
    self.titleLabel.backgroundColor = [UIColor grayColor];
    [self.titleLabel setTextColor:[UIColor whiteColor]];
    self.titleLabel.textAlignment = 1;
    self.titleLabel.text = @"1 / 7";
    self.scrollView.contentOffset = CGPointMake(WIDTH, 0);
    self.scrollView.pagingEnabled = YES;
    self.scrollView.delegate = self;
}
- (void)pageAction:(UIPageControl *)page {
    NSLog(@"%ld", self.pageControl.currentPage);
//    self.scrollView.contentOffset = CGPointMake(WIDTH * page.currentPage + WIDTH, 0);
    [self.scrollView setContentOffset:CGPointMake(WIDTH *page.currentPage + WIDTH, 0) animated:YES];
    [self.titleLabel setText:[NSString stringWithFormat:@"%ld / 7", (NSInteger)(page.currentPage + 1)]];
}
//滑动结束
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    if (scrollView.contentOffset.x == 0) {
        scrollView.contentOffset = CGPointMake(WIDTH * 7, 0);
    }else if(scrollView.contentOffset.x == 8 * WIDTH){
        scrollView.contentOffset = CGPointMake(WIDTH , 0);
    }
    
     self.pageControl.currentPage = scrollView.contentOffset.x / WIDTH - 1;
    [self.titleLabel setText:[NSString stringWithFormat:@"%ld / 7", (NSInteger)(self.pageControl.currentPage + 1)]];
}
- (void)dealloc{
    [_scrollView release];
    [_pageControl release];
    [super dealloc];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end