1 #import "ViewController.h"
2 #define WIDTH self.view.frame.size.width
3 #define HEIGHT self.view.frame.size.height
4 @interface ViewController ()<UIScrollViewDelegate>
5 @property (strong,nonatomic) UIImageView *imageView;
6 @property (strong,nonatomic) UIScrollView *scroll;
7 @property (strong,nonatomic) UIPageControl *pageControl;
8 @end
9
10 @implementation ViewController
11
12 - (void)viewDidLoad {
13 [super viewDidLoad];
14 self.view.backgroundColor = [UIColor grayColor];
15 //创建一个和屏幕等尺寸的ScorllView
16 _scroll = [[UIScrollView alloc] initWithFrame:self.view.frame];
17 _scroll.backgroundColor = [UIColor yellowColor];
18 //重要:水平方向滚动位置,contentSize--滚动范围
19 _scroll.contentSize = CGSizeMake(WIDTH * 7, 0);
20
21 //重要---按页来滚动
22 _scroll.pagingEnabled = YES;
23 //关闭屏幕回弹效果
24 _scroll.bounces = NO;
25 //关闭滚动条
26 _scroll.showsHorizontalScrollIndicator = NO;
27 //非常重要-偏移量
28 #pragma ************如果下边这一句不注掉那么运行工程的时候系统会自动偏移一次,从而会显示第二张图片
29 //_scroll.contentOffset = CGPointMake(WIDTH, 0);
30 //垂直方向的滚动范围
31 _scroll.contentSize = CGSizeMake(WIDTH * 7, 0);
32 _scroll.maximumZoomScale = 2;
33 _scroll.minimumZoomScale = 0.5;
34
35 //水平方向的视图摆放
36 for (int i = 1; i < 8; i++) {
37 //创建小的scrollView
38 UIScrollView *scroll2 = [[UIScrollView alloc]initWithFrame:CGRectMake((i - 1) * WIDTH, 0, WIDTH, HEIGHT)];
39
40 //循环创建视图,添加到srollView上
41 self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
42 self.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"h%d.jpeg",i]];
43 [scroll2 addSubview:self.imageView];
44 //一定要记得为每个小的scroll添加代理,否则不能实现缩放
45 scroll2.delegate = self;
46 scroll2.maximumZoomScale = 2;
47 scroll2.minimumZoomScale = 0.5;
48 [_scroll addSubview:scroll2];
49 }
50 // //垂直方向的偏移量
51 // _scroll.contentOffset = CGPointMake(0, HEIGHT);
52 // for (int i = 1; i < 8; i++) {
53 // UIScrollView *scroll2 = [[UIScrollView alloc] initWithFrame:CGRectMake(0, (i - 1) * HEIGHT, WIDTH, HEIGHT)];
54 // [_scroll addSubview:scroll2];
55 // //self.imageView.frame = self.view.frame;
56 // self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
57 // self.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"h%d.jpeg",i]];
58 // [scroll2 addSubview:self.imageView];
59 // }
60
61 // self.scroll.maximumZoomScale = 2;
62 // self.scroll.minimumZoomScale = 0.5;
63
64 [self.view addSubview:_scroll];
65 _scroll.delegate = self;
66 //添加手势,双击屏幕,缩放回到原型
67 UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(setScrollZoom)];
68 tap.numberOfTapsRequired =2;
69 [self.scroll addGestureRecognizer:tap];
70
71
72 _pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, HEIGHT - 80, WIDTH, 40)];
73 _pageControl.numberOfPages = 7;
74 _pageControl.pageIndicatorTintColor = [UIColor redColor];
75 //当前页指示器(也就是小点点)的颜色
76 _pageControl.currentPageIndicatorTintColor = [UIColor greenColor];
77 [self.view addSubview:_pageControl];
78 [_pageControl addTarget:self action:@selector(pagAction:) forControlEvents:UIControlEventValueChanged];
79
80
81 }
82 //实现代理里的缩放
83 -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
84 {
85 _scroll.subviews[0].center = self.view.center;
86 return scrollView.subviews[0];
87 }
88 #pragma mark - page的响应事件
89
90 - (void)pagAction:(UIPageControl *)sender{
91 //根据paged当前的小圆点算出现在在显示的是第几张图片,从而改变偏移量 setContentOffset(跳转至指定的页面)
92 [self.scroll setContentOffset:CGPointMake(self.pageControl.currentPage * WIDTH, 0) animated:YES];
93 [self setScrollZoom];
94 }
95 #pragma mark - 把所有的小scrollView的缩放比例变为1,也就是改回原型
96 - (void)setScrollZoom{
97 //当减速结束的时候,那张图回复原样
98 //把所有的imv的缩放比例设置为1
99 for (UIScrollView *s in self.scroll.subviews) {
100 if ([s isKindOfClass:[UIScrollView class]]) {
101 [s setZoomScale:1 animated:NO];
102 }
103 }
104 }
105
106
107
108
109
110 -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
111 {
112 NSLog(@"开始拖拽的时候触发");
113 }
114 #pragma mark--UIScrollView 滚动协议方法
115 -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
116 {
117 [self setScrollZoom];
118 NSLog(@"结束拖拽时触发");
119 }
120
121
122
123 -(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
124 {
125 NSLog(@"开始减速时触发");
126 }
127 #pragma mark -scroll的代理方法,减速结束
128 -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
129 {
130 //根据偏移量算出现在在显示的是第几张图片,从而改变paged当前的小圆点
131 self.pageControl.currentPage = self.scroll.contentOffset.x/WIDTH;
132 [self setScrollZoom];
133 NSLog(@"减速完成时触发");
134 }
135
136 - (void)didReceiveMemoryWarning {
137 [super didReceiveMemoryWarning];
138 // Dispose of any resources that can be recreated.
139 }
140
141 @end
