写 iOS APP 的引导页(UIScrollView )

//创建ScrollView

    UIScrollView *sv = [[UIScrollView alloc] init];

    sv.frame = self.view.bounds;

    //设置边缘不弹跳

    sv.bounces = NO;

    //整页滚动

    sv.pagingEnabled = YES;

    sv.showsHorizontalScrollIndicator = NO;

    

    NSArray *array = @[@"1",@"2",@"3",@"4"];

    for(NSInteger i=0; i < array.count ; i++){

        NSString *imgName = [NSString stringWithFormat:@"%ld", i+1];

        UIImage *image = [UIImage imageNamed:imgName];

        UIImageView *imageView = [[UIImageView alloc]initWithImage:image];

        CGRect frame = CGRectZero;

        frame.origin.x = i * sv.frame.size.width;

        frame.size = sv.frame.size;

        imageView.frame = frame;

        [sv addSubview:imageView];

        if(i== array.count - 1){

            //开启图片的用户点击功能

            imageView.userInteractionEnabled = YES;

            //加个按钮

            UIButton *button = [[UIButton alloc]init];

            button.frame = CGRectMake((imageView.frame.size.width-150)/2, imageView.frame.size.height*0.8, 150, 40);

            button.backgroundColor = [UIColor orangeColor];

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

            button.titleLabel.font = [UIFont boldSystemFontOfSize:16];

            [imageView addSubview:button];

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

    }

 

    sv.contentSize = CGSizeMake(array.count * sv.frame.size.width, sv.frame.size.height);

　　//右上角的跳转按钮

    UIButton *SkipButton = [[UIButton alloc]init];

    SkipButton.frame = CGRectMake(self.view.frame.size.width - 100, 40 , 80 , 30);

    SkipButton.backgroundColor = [UIColor redColor];

    [SkipButton setTitle:@"跳过" forState:UIControlStateNormal];

    SkipButton.titleLabel.font = [UIFont boldSystemFontOfSize:16];

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

    [self.view addSubview:sv];

    [self.view addSubview:SkipButton];

    

    //加入页面指示控件PageControl

    UIPageControl *pageControl = [[UIPageControl alloc]init];

    self.pageControl = pageControl;

    //设置frame

    pageControl.frame = CGRectMake(0, self.view.frame.size.height - 40, self.view.frame.size.width, 20);

    //分页面的数量

    pageControl.numberOfPages = array.count;

    //设置小圆点渲染颜色

    pageControl.pageIndicatorTintColor = [UIColor whiteColor];

    //设置当前选中小圆点的渲染颜色

    pageControl.currentPageIndicatorTintColor = [UIColor redColor];

    //关闭用户点击交互

    pageControl.userInteractionEnabled = NO;

    [self.view addSubview:pageControl];

    sv.delegate = self;