基于UIScrollView和UIPageControl控件做的用户引导界面

亦凉 2022-08-11 16:48 129阅读 0赞

效果图片![Center][]![Center 1][]

#import "RootViewController.h"
    
    @interface RootViewController ()<UIScrollViewDelegate>
    
    @end
    @implementation RootViewController
    
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        self.view.backgroundColor = [UIColor grayColor];
        /**
         *  UIpageControl
         1.表示页数.
         2.表示当前正处于第几页
         3.点击切换页数.
         *
         */
        //存储用户的偏好设置,存储在本地,比如:程序是不是第一次加载
        NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
        if (![userDefaults boolForKey:@"aa"]) {
            [self setupFirstLanchView];
            [userDefaults setBool:YES forKey:@"aa"];
            //立即同步
            [userDefaults synchronize];
        }
    }
    //创建程序第一次运行要加载的视图
    - (void)setupFirstLanchView{
        [self setupScrollView];
        [self setupPageControl];
    }
    - (void)setupScrollView{
        UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];
        scrollView.tag = 200;
    //    scrollView.maximumZoomScale = 4.0;
    //    scrollView.minimumZoomScale = 1.0;
        scrollView.showsHorizontalScrollIndicator = YES;//关闭水平滑动线
        scrollView.pagingEnabled = YES;//设置整屏滑动
        scrollView.contentSize = CGSizeMake(320*6, [UIScreen mainScreen].bounds.size.height);
        scrollView.delegate = self;//设置代理
        [self.view addSubview:scrollView];
        [scrollView release];
        
        for (int i = 0; i < 6; i++) {
            UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(320*i , 0, 320,[UIScreen mainScreen].bounds.size.height)];
            imageView.image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"v6_guide_%d",i+1] ofType:@"png"]];
            [scrollView addSubview:imageView];
            [imageView release];
        }
    }
    - (void)setupPageControl{
        UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(10, [UIScreen mainScreen].bounds.size.height - 40, 300, 20)];
        pageControl.tag = 100;
        //pageControl.backgroundColor = [UIColor whiteColor];
        //设置页数
        pageControl.numberOfPages = 6;
        //设置当前的点
        pageControl.currentPage = 0;
        //设置未选中点的颜色
        pageControl.pageIndicatorTintColor = [UIColor orangeColor];
        //设置选中点的颜色
        pageControl.currentPageIndicatorTintColor = [UIColor blackColor];
        //添加响应事件
        [pageControl addTarget:self action:@selector(handlePageControl:) forControlEvents:UIControlEventValueChanged];
        [self.view addSubview:pageControl];
        [pageControl release];
    }
    - (void)handlePageControl:(UIPageControl *)pageControl{
        //切换pageControl,对应切换scrollView不同的界面
        UIScrollView *scrollView = (UIScrollView *)[self.view viewWithTag:200];
        //contentOffset偏移量
        [scrollView setContentOffset:CGPointMake(320 * pageControl.currentPage, 0) animated:YES];
    }
    - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
        UIPageControl *pageControl = (UIPageControl *)[self.view viewWithTag:100];
        pageControl.currentPage = scrollView.contentOffset.x/320;
    }
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    @end

[Center]: https://img-blog.csdn.net/20140831151029196?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZHVvZHVvXzMzMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: /images/20220810/d26b7cc07cb84f4d977a7b44667bcc8d.png