简易相册

#import "MainViewController.h"

#define WIDTH self.view.frame.size.width

#define HEIGHT self.view.frame.size.height

#import "SecondViewController.h"

@interface MainViewController ()

@end

@implementation MainViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor whiteColor];

    self.title = @"相册";

    self.navigationController.navigationBar.translucent = NO;

    

    for (NSInteger i = 1; i < 4; i++) {

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

        button.frame = CGRectMake(0,(HEIGHT-64)/3 * (i-1) , WIDTH /2 , (HEIGHT-64) /3);

        NSString *picName = [NSString stringWithFormat:@"%ld.jpg",2*i-1];

        [button setImage:[UIImage imageNamed:picName] forState:UIControlStateNormal];

        [self.view addSubview:button];

        [button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];

        button.tag = 1000+ 2*i-1 ;

    }

    

    for (NSInteger i = 1; i < 4 ; i++) {

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

        button.frame = CGRectMake(WIDTH/2,(HEIGHT-64)/3 * (i-1) , WIDTH /2 , (HEIGHT-64) /3 );

        NSString *picName = [NSString stringWithFormat:@"%ld.jpg",2*i];

        [button setImage:[UIImage imageNamed:picName] forState:UIControlStateNormal];

        [self.view addSubview:button];

        [button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];

        button.tag = 1000 + 2*i;

    }

    

}

-(void)click:(UIButton *)button

{

    for (NSInteger i = 1001 ; i < 1007 ; i++) {

        if (button.tag == i ) {

            SecondViewController *secondVC  = [[SecondViewController alloc] init];

            [self.navigationController pushViewController:secondVC animated:YES];

            secondVC.num = i -1001;

            secondVC.str =  [NSString stringWithFormat:@"%ld",i-1000];

            [secondVC release];

        }

    }

}

#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController

@property(nonatomic, assign)NSInteger num;

@property(nonatomic, copy)NSString *str;

@end

#import "SecondViewController.h"

#define WIDTH self.view.frame.size.width

#define HEIGHT self.view.frame.size.height

@interface SecondViewController ()<UIScrollViewDelegate>

@property(nonatomic, retain)UIScrollView *scrollView;

@end

@implementation SecondViewController

- (void)dealloc

{

    [_str release];

    [_scrollView release];

    [super dealloc];

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

   

    self.view.backgroundColor = [UIColor whiteColor];

    

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

    self.scrollView.backgroundColor = [UIColor whiteColor];

    [self.view addSubview:self.scrollView];

    [_scrollView release];

    [self.view bringSubviewToFront:self.scrollView];

    self.scrollView.contentSize = CGSizeMake(WIDTH * 6, HEIGHT);

    

    self.scrollView.showsHorizontalScrollIndicator = NO;

    self.scrollView.bounces = NO;

    self.scrollView.pagingEnabled = YES;

    self.scrollView.delegate = self;

    

    for (NSInteger i = 1 ; i < 7 ; i++) {

        NSString *picName = [NSString stringWithFormat:@"%ld.jpg",i];

        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:picName]];

        imageView.frame = CGRectMake(WIDTH*(i-1), 0, WIDTH, HEIGHT );

        [self.scrollView addSubview:imageView];

    }

 

 

    UIPageControl *page = [[UIPageControl alloc] initWithFrame:CGRectMake(80, 550, 200, 30)];

    page.backgroundColor = [UIColor cyanColor];

    page.numberOfPages = 6;

    page.currentPageIndicatorTintColor = [UIColor whiteColor];

    page.pageIndicatorTintColor = [UIColor lightGrayColor];

    page.currentPage = self.num;

   [self.view addSubview:page];

    [page release];

    page.tag = 1000;

    [page addTarget:self action:@selector(click:) forControlEvents:UIControlEventValueChanged];

  

    

    for (NSInteger i = 1; i < 7 ; i++) {

        NSString *title = [NSString stringWithFormat:@"%ld",i];

        if ([self.str isEqualToString:title]) {

            self.scrollView.contentOffset = CGPointMake(WIDTH * (i -1), 0);

            NSString *newtitle = [NSString stringWithFormat:@"第%ld页",i];

            self.title = newtitle;

        }

    }

    

    

}

-(void)click:(UIPageControl *) page

{

    [self.scrollView setContentOffset:CGPointMake(WIDTH * page.currentPage, 0) animated:YES];

    NSInteger num = self.scrollView.contentOffset.x / WIDTH + 1;

    NSString *title = [NSString stringWithFormat:@"第%ld页",num];

    self.title = title;

}

-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

{

    

}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    UIPageControl *page = (UIPageControl *)[self.view viewWithTag:1000];

    NSString *title = [NSString stringWithFormat:@"第%g页",self.scrollView.contentOffset.x / WIDTH + 1];

    self.title = title;

    page.currentPage = self.scrollView.contentOffset.x / WIDTH;

    

}