引导页 + 定时器

#import "ViewController.h"

#import "SecViewController.h"

@interface ViewController ()<UIScrollviewDelegate>

{

    UIScrollView *scroll;  //滚动视图

    NSArray *imgArr; //图片数组

    UIPageControl *page; //分页控件

    NSTimer *theTime;

    NSInteger thePageTime;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //设置背景颜色

    self.view.backgroundColor = [UIColor cyanColor];

    //创建滚动视图

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

    //设置代理

    scroll.delegate = self;

    //将滚动视图添加到视图上

    [self.view addSubview:scroll];

    //创建图片数组

    imgArr = @[@"1.jpg",@"2.jpg",@"3.jpg",@"4.jpg"];

    //使用for循环设置图片

    for (int i=0; i<4; i++) {

        //创建图片框

        UIImageView *image = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.frame.size.width * i, 0, self.view.frame.size.width, self.view.frame.size.height)];

        //设置图片

        image.image = [UIImage imageNamed:imgArr[i]];

        //允许与用户交互

        image.userInteractionEnabled = YES;

        //将图片添加到滚动视图

        [scroll addSubview:image];

        /**

        if (i == 3)

        {

        // 创建立即体验按钮

        UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

        btn.frame = CGRectMake((self.view.frame.size.width - 100)/2, 600, 100, 44);

        [btn setTitle:@"立即体验" forState:UIControlStateNormal];

        //            btn.backgroundColor = [UIColor cyanColor];

        // 给按钮添加点击事件

        [btn addTarget:self action:@selector(didClickBtn) forControlEvents:UIControlEventTouchUpInside];

        // 设置圆角

        btn.layer.cornerRadius = 8;

        btn.layer.masksToBounds = YES;

        // 设置边框

        btn.layer.borderWidth = 1;

        btn.layer.borderColor = [UIColor cyanColor].CGColor;

        // 将按钮添加到图片上

        [image addSubview:btn];

        }

        */

    }

    //设置滚动范围

    scroll.contentSize = CGSizeMake(self.view.frame.size.width*4, self.view.frame.size.height);

    //取消弹簧效果

    scroll.bounces = NO;

    //设置分页效果

    scroll.pagingEnabled = YES;

    //隐藏水平滚动条

    scroll.showsHorizontalScrollIndicator = NO;

    //创建分页控件

    page = [[UIPageControl alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 100)/2, self.view.frame.size.height-100, 100, 30)];

    //设置页数

    page.numberOfPages = 4;

    //设置页码颜色

    page.pageIndicatorTintColor = [UIColor redColor];

    //设置当前页码颜色

    page.currentPageIndicatorTintColor = [UIColor blackColor];

    //添加到视图

    [self.view addSubview:page];

    //记录当前的图片

    thePageTime = page.currentPage;

    //创建定时器

    theTime = [NSTimer scheduledTimerWithTimeInterval:1.5 target:self selector:@selector(Scroll) userInfo:nil repeats:YES];

}

//滚动视图协议的方法

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

    //将滚动的页数和滚动视图关联

    page.currentPage = scroll.contentOffset.x/self.view.frame.size.width;

}

//定时器方法

-(void)Scroll{

    thePageTime++;

    if (thePageTime >= imgArr.count) {

        thePageTime = 3;

        [theTime invalidate];

        theTime = nil;

        [self presentViewController:[SecViewController new] animated:YES completion:nil];

    }

    //计算滚动视图的偏移量

    [scroll setContentOffset:CGPointMake(thePageTime * scroll.frame.size.width, 0) animated:YES];

}

-(void)didClickBtn{

}

@end