IOS UIPageController

朴灿烈づ我的快乐病毒、 2023-10-18 08:04 12阅读 0赞

- (void)viewDidLoad
    
    {
    
        [super viewDidLoad];
    
    // Do any additional setup after loading the view, typically from a nib.
    
        //定义UIScrollView
    
        //self.scrollView = [[UIScrollView alloc] init];
    
        //self.scrollView.frame = CGRectMake(10, 0, 200, 500);
    
        self.scrollView.contentSize = CGSizeMake(1000,288);  //scrollview的滚动范围
    
        self.scrollView.showsVerticalScrollIndicator = NO;
    
        self.scrollView.showsHorizontalScrollIndicator = NO;
    
        //myScrollView.clipsToBounds = YES;
    
        self.scrollView.delegate = self;
    
        self.scrollView.scrollEnabled = YES;
    
        self.scrollView.pagingEnabled = YES; //使用翻页属性
    
        self.scrollView.bounces = NO;
    
        
    
        for(int i=0;i<4;i++)
    
        {
    
            UIImageView *imageV =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"wel2.png"]];
    
            [imageV setFrame:CGRectMake(200*i, 0, 192, 288)];
    
            [self.scrollView addSubview:imageV];
    
            
    
        }
    
    
    
        //定义PageControll
    
        self.pageControl.numberOfPages = 4;//指定页面个数
    
        self.pageControl.currentPage = 0;//指定pagecontroll的值，默认选中的小白点（第一个）
    
        [self.pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
    
    }
    
    
    
    
    
    
    
    //scrollview的委托方法，当滚动时执行
    
    - (void)scrollViewDidScroll:(UIScrollView *)sender {
    
        int page = self.scrollView.contentOffset.x / 192;//通过滚动的偏移量来判断目前页面所对应的小白点
    
        self.pageControl.currentPage = page;//pagecontroll响应值的变化
    
    }
    
    
    
    
    
    - (IBAction)changePage:(id)sender {
    
        int page = self.pageControl.currentPage;//获取当前pagecontroll的值
    
        self.label1.text = [[NSString alloc]initWithFormat:@"%d",page];
    
        [self.scrollView setContentOffset:CGPointMake(200 * page, 0)];//根据pagecontroll的值来改变scrollview的滚动位置，以此切换到指定的页面
    
       }