添加app第一次启动页面

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
复制提示

一、添加几个成员变量

@interface hDisplayView ()<UIScrollViewDelegate>

{

    UIScrollView    *_bigScrollView;

    NSMutableArray  *_imageArray;

    UIPageControl   *_pageControl;

}

二、添加构造方法

-(instancetype)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        _imageArray = [@[@"闪屏1.png",@"闪屏2.png", @"闪屏3.png",@"闪屏4.png"]mutableCopy];

//        _imageArray = [NSMutableArray arrayWithObjects:@"闪屏1.png",@"闪屏2.png", @"闪屏3.png",@"闪屏4.png", nil];

        UIScrollView *scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(, , MainScreen_width, MainScreen_height)];

        scrollView.contentSize = CGSizeMake((_imageArray.count + )*MainScreen_width, MainScreen_height);

        //设置反野效果，不允许反弹，不显示水平滑动条，设置代理为自己

        scrollView.pagingEnabled = YES;//设置分页

        scrollView.bounces = NO;

        scrollView.showsHorizontalScrollIndicator = NO;

        scrollView.delegate = self;

        [self addSubview:scrollView];

        _bigScrollView = scrollView;

        for (int i = ; i < _imageArray.count; i++) {

            UIImageView *imageView = [[UIImageView alloc]init];

            imageView.frame = CGRectMake(i * MainScreen_width, , MainScreen_width, MainScreen_height);

            UIImage *image = [UIImage imageNamed:_imageArray[i]];

            imageView.image = image;

            [scrollView addSubview:imageView];

        }

        UIPageControl *pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(MainScreen_width/, MainScreen_height - , , )];

        pageControl.numberOfPages = _imageArray.count;

        pageControl.backgroundColor = [UIColor clearColor];

        [self addSubview:pageControl];

        _pageControl = pageControl;

        //添加手势

        UITapGestureRecognizer *singleRecognizer;

        singleRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleSingleTapFrom)];

        singleRecognizer.numberOfTapsRequired = ;

        [scrollView addGestureRecognizer:singleRecognizer];

    }

    return self;

}

三、添加一个手势，在周到最后一页的时候，让整个view隐藏

-(void)handleSingleTapFrom

{

    if (_pageControl.currentPage == ) {

        self.hidden = YES;

    }

}

四、添加一个scrollview的代理方法，让pagecontrol在scrollview的中间位置

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    if (scrollView == _bigScrollView) {

        CGPoint offSet = scrollView.contentOffset;

        _pageControl.currentPage = offSet.x/(self.bounds.size.width);//计算当前的页码

        [scrollView setContentOffset:CGPointMake(self.bounds.size.width * (_pageControl.currentPage), scrollView.contentOffset.y) animated:YES];

    }

    if (scrollView.contentOffset.x == (_imageArray.count) *MainScreen_width) {

        self.hidden = YES;

    }

}