UIScrollView

// 聲明
@property(nonatomic,retain)UIScrollView *scrollView;

    self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(100, 100, 200, 400)];
    self.scrollView.backgroundColor = [UIColor whiteColor];
   
    //1. contentSize 定義內(nèi)容區(qū)域大小 當(dāng)contentsize 比frame.size大時(shí),才可實(shí)現(xiàn)滾動(dòng)
    self.scrollView.contentSize = CGSizeMake(400, 800);
   
    UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"2.png"]];
    imageView.tag = 100;
    imageView.frame = CGRectMake(0, 0, 200, 350);
    [self.scrollView addSubview:imageView];
   
    //2.  contentOffset 視圖左上角距離坐標(biāo)原點(diǎn)的偏移量
    self.scrollView.contentOffset = CGPointMake(-20, -50);
   
    //3.  scrollsToTop 滑動(dòng)到頂部
    self.scrollView.scrollsToTop = YES; // default YES.
   
    // 4. pagingEnabled 是否整屏滑動(dòng)
    self.scrollView.pagingEnabled = YES; // default NO.
   
    // 5. bounces邊界是否回彈
    self.scrollView.bounces = YES;// default YES.
   
    // 6. scroll 設(shè)置是否能夠滾動(dòng) (不常用)
    self.scrollView.scrollEnabled = YES;
    // 7. 顯示水平或豎直方向進(jìn)度條
    self.scrollView.showsHorizontalScrollIndicator = YES;
    self.scrollView.showsVerticalScrollIndicator = NO;
    // 8. 設(shè)置水平或豎直方向的邊框是否反彈
    self.scrollView.alwaysBounceHorizontal = YES;
    self.scrollView.alwaysBounceVertical = YES;
   
   
    // 縮放相關(guān)
    // 要實(shí)現(xiàn)縮放,還需要實(shí)現(xiàn)delegate,指定縮放的視圖是誰
   
    // 指定最大縮放 和 最小縮放
    self.scrollView.minimumZoomScale = 0.5;
    self.scrollView.maximumZoomScale = 2.0;
  
    // 設(shè)置縮放變化比例
    self.scrollView.zoomScale  = 1.5;
   
    // 控制縮放是否反彈
    self.scrollView.bouncesZoom = YES;
   
    [self addSubview:self.scrollView];
}
#pragma mark UIScrollViewDelegate
// 1. 遵守協(xié)議
@interface RootViewController : UIViewController<UIScrollViewDelegate>
 // 2.設(shè)置代理
self.rootV.scrollView.delegate = self;
// 3.實(shí)現(xiàn) 指定scrollView設(shè)置代理的方法
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
    // 1.利用Tag值
    // return [scrollView viewWithTag:100];
    // 2. 利用子視圖
    return  scrollView.subviews[0];
}
// ScrollView 滾動(dòng)流程

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
    NSLog(@"開始拖拽");
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    NSLog(@"正在滾動(dòng)");
}
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView{
    NSLog(@"結(jié)束拖拽");
}
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
    NSLog(@"開始減速");
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    NSLog(@"結(jié)束減速");
}
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale{
    NSLog(@"我已經(jīng)完成縮放了");
}

UIPageControl

@property(nonatomic,retain)UIPageControl *page;

- (void)p_setupView{
    self.backgroundColor = [UIColor yellowColor];
    self.page = [[UIPageControl alloc]initWithFrame:CGRectMake(CGRectGetMinX(self.frame), CGRectGetMaxY(self.frame) - 50, CGRectGetWidth(self.frame), 50)];
    self.page.backgroundColor = [UIColor blackColor];

    [self addSubview:self.page];
    // 1. 一共多少頁
    self.page.numberOfPages = 5;
   
    // 2. 獲取當(dāng)前頁
    // NSInteger *i = self.page.currentPage;
   
    // 3. 設(shè)置頁面指示器 非當(dāng)前頁小圓點(diǎn) 的顏色
    self.page.pageIndicatorTintColor = [UIColor redColor];
   
    // 4. 設(shè)置頁面指示器 當(dāng)前頁小圓點(diǎn) 的顏色
    self.page.currentPageIndicatorTintColor = [UIColor greenColor];
   
    // 不常用且不明所以
    // 5. 跳轉(zhuǎn)頁面 關(guān)閉小圓點(diǎn)跳轉(zhuǎn)
    //self.page.defersCurrentPageDisplay = YES;
  
    self.page.hidesForSinglePage = YES;
    [self.page updateCurrentPageDisplay];
    [self.page sizeForNumberOfPages:2];
}

// 使用 添加action
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
   // 添加action 
    [self.rootV.page addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];
}
- (void)pageAction:(UIPageControl *)sender{
    NSLog(@"這是第 %ld 頁",sender.currentPage);
}

UIScrollView和UIPageControl 結(jié)合使用

// 遵循協(xié)議
@interface RootViewController ()<UIScrollViewDelegate>

@property(nonatomic,retain)RootView *rootV;
@property(nonatomic,retain)NSMutableArray *nameArr;

@end

@implementation RootViewController

-(void)loadView{
    self.rootV = [[RootView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    self.view = self.rootV;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // 1. 處理數(shù)據(jù)
    [self p_date];
    // 2. 顯示圖片
    [self p_show];
    // 3.設(shè)置代理
    self.rootV.scrollV.delegate = self;
    // 4. 設(shè)置圖片隨 currentpage移動(dòng)而換
    [self.rootV.pageC addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];
   
    // Do any additional setup after loading the view.
}
- (void)pageAction:(UIPageControl *)sender{
    [UIView animateWithDuration:0.5 animations:^{
        self.rootV.scrollV.contentOffset = CGPointMake(self.rootV.pageC.currentPage * self.rootV.frame.size.width, 0);
    }];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    self.rootV.pageC.currentPage = scrollView.contentOffset.x / self.rootV.frame.size.width;
}
- (void)p_date{
    self.nameArr = [NSMutableArray array];
    for (int i = 0; i < 7; i ++) {
        NSString *name = [NSString stringWithFormat:@"%d.jpeg",i];
        [self.nameArr addObject:name];
    }
}
- (void)p_show{
    for (int i = 0; i < self.nameArr.count; i ++) {
        UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage imageNamed:self.nameArr[i]]];
        image.frame = CGRectMake(self.rootV.frame.size.width * i, 0, self.rootV.frame.size.width, self.rootV.frame.size.height);
        [self.rootV.scrollV addSubview:image];
    }
    self.rootV.scrollV.contentSize = CGSizeMake(self.rootV.frame.size.width * self.nameArr.count, self.rootV.frame.size.height);
    self.rootV.pageC.currentPage = 0;
    self.rootV.pageC.numberOfPages = self.nameArr.count;
    self.rootV.scrollV.pagingEnabled = YES;
}