@PRoperty(nonatomic) CGPoint contentOffset; // 記錄UIScrollView滾動的位置@property(nonatomic) CGSize contentSize; // 內容尺寸（能滾動的范圍）@property(nonatomic) UIEdgeInsets contentInset; // 額外增加的滾動區域（在上下左右4個邊緣）@property(nonatomic,assign) id<UIScrollViewDelegate> delegate; // 代理對象@property(nonatomic) BOOL bounces; // 是否有彈簧效果@property(nonatomic) BOOL showsHorizontalScrollIndicator; // 是否顯示水平滾動條@property(nonatomic) BOOL showsVerticalScrollIndicator; // 是否顯示垂直滾動條

 1     CGFloat w = self.view.frame.size.width; 2     CGFloat h = self.view.frame.size.height; 3     for (int i = 0; i< kCount; i++) { 4         UIImageView *imageView = [[UIImageView alloc] init]; 5          6         // 1.設置frame 7         imageView.frame = CGRectMake(i * w, 0, w, h); 8          9         // 2.設置圖片10         NSString *imgName = [NSString stringWithFormat:@"0%d.jpg", i + 1];11         imageView.image = [UIImage imageNamed:imgName];12         13         [_scrollView addSubview:imageView];

 // height == 0 代表 禁止垂直方向滾動    _scrollView.contentSize = CGSizeMake(kCount * w, 0);    _scrollView.showsHorizontalScrollIndicator = NO;    _scrollView.pagingEnabled = YES;    _scrollView.delegate = self;

 1     UIPageControl *pageControl = [[UIPageControl alloc] init]; 2     pageControl.center = CGPointMake(w * 0.5, h - 20); 3     pageControl.bounds = CGRectMake(0, 0, 150, 50); 4     pageControl.numberOfPages = kCount; // 一共顯示多少個圓點（多少頁） 5     // 設置非選中頁的圓點顏色 6     pageControl.pageIndicatorTintColor = [UIColor redColor]; 7     // 設置選中頁的圓點顏色 8     pageControl.currentPageIndicatorTintColor = [UIColor blueColor]; 9     10     // 禁止默認的點擊功能11     pageControl.enabled = NO;12     13     [self.view addSubview:pageControl];14     _pageControl = pageControl;

#pragma mark - UIScrollView的代理方法#pragma mark 當scrollView正在滾動的時候調用- (void)scrollViewDidScroll:(UIScrollView *)scrollView{    int page = scrollView.contentOffset.x / scrollView.frame.size.width;//    NSLog(@"%d", page);        // 設置頁碼    _pageControl.currentPage = page;}