同时控制多个UIScrollView对象

最新推荐文章于 2021-04-12 05:25:19 发布

转载最新推荐文章于 2021-04-12 05:25:19 发布 · 94 阅读

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原文链接：http://www.cnblogs.com/submarinex/archive/2012/12/09/2810555.html

效果：

分别拖动下方和上方滚动视图

用数组把所有的UIScrollView对象储存起来。

 1 #import "ViewController.h"
 2 
 3 @interface ViewController () <UIScrollViewDelegate>
 4 
 5 @end
 6 
 7 @implementation ViewController
 8 
 9 @synthesize scrollViews = _scrollViews;
10 
11 - (void)viewDidLoad
12 {
13     [super viewDidLoad];
14     
15     UIImageView *imgViewUp = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"2.png"]];
16     UIScrollView *scrollViewUp = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, imgViewUp.frame.size.height)];
17     scrollViewUp.contentSize = CGSizeMake(imgViewUp.frame.size.width, imgViewUp.frame.size.height);
18     scrollViewUp.bounces = NO;
19     scrollViewUp.clipsToBounds = YES;
20     scrollViewUp.delegate = self;
21     [scrollViewUp addSubview:imgViewUp];
22     [self.view addSubview:scrollViewUp];
23     /////////////////////////////////////////////////////////////////////////////////
24     float height = imgViewUp.frame.size.height;
25     UIImageView *imgViewCenter = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.png"]];
26     imgViewCenter.userInteractionEnabled = YES;
27     UIScrollView *scrollViewCenter = [[UIScrollView alloc] initWithFrame:CGRectMake(0, height, self.view.frame.size.width, self.view.frame.size.height-height)];
28     scrollViewCenter.contentSize = CGSizeMake(imgViewCenter.frame.size.width, imgViewCenter.frame.size.height);
29     scrollViewCenter.bounces = NO;
30     scrollViewCenter.clipsToBounds = YES;
31     // scrollViewCenter的委托是本对象（ViewController）
32     scrollViewCenter.delegate = self;
33     [scrollViewCenter addSubview:imgViewCenter];
34     [self.view addSubview:scrollViewCenter];
35     
36     self.scrollViews = [NSArray arrayWithObjects:scrollViewCenter, scrollViewUp, nil];
37 }
38 
39 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
40 {
41     // 枚举UIScrollView对象数组中每一个对象
42     for (UIScrollView *view in self.scrollViews) {
43         // 对非当前UIScrollView对象进行设置偏移量（contentOffset）
44         if (scrollView != view) {
45             [view setContentOffset:scrollView.contentOffset];
46         }
47     }
48 }

。

转载于:https://www.cnblogs.com/submarinex/archive/2012/12/09/2810555.html