新闻客户端首页图片无限循环滚动展示(可点击触发不同事件)初步封装IOS

http://blog.csdn.net/u013082522/article/details/19622937

此类继承于UIView.引入头文件,初始化对象,设置代理,只需要传入一个盛放图片的数组即可.

以下为.h文件

[objc] view plaincopy

1. #import <UIKit/UIKit.h>  
2.   
3. @protocol ImageScrollViewDelegate <NSObject>  
4.   
5. - (void)tapImageAtIndex:(int)index;  
6.   
7. @end  
8. @interface ImageScrollView : UIView<UIScrollViewDelegate,UIGestureRecognizerDelegate>  
9.   
10. @property(nonatomic,assign)id<ImageScrollViewDelegate>delegate;  
11.   
12. - (id)initWithFrame:(CGRect)frame imageDataArr:(NSArray *)imageDataArr;  
13.   
14. - (void)setPageControlColor:(UIColor *)color;//外界传颜色参数  
15.   
16. @end  

以下为.m文件

[objc] view plaincopy

1. #import "ImageScrollView.h"  
2. @interface ImageScrollView ()  
3. {  
4.     int imageHight;  
5.       
6.     int imageWidth;  
7.       
8.     int imageCount;  
9. }  
10. @property(nonatomic,retain)UIScrollView *imageScrollView;  
11.   
12. @property(nonatomic,strong)UIPageControl *pageNumber;  
13.   
14. @property(nonatomic,retain)NSArray *imageArray;  
15.   
16. @end  
17. @implementation ImageScrollView  
18.   
19. - (id)initWithFrame:(CGRect)frame imageDataArr:(NSArray *)imageDataArr  
20. {  
21.     self = [super initWithFrame:frame];  
22.     if (self) {  
23.         imageHight = self.frame.size.height-20;  
24.         imageWidth = self.frame.size.width;  
25.         self.imageArray = [NSArray arrayWithArray:imageDataArr];  
26.         imageCount = [self.imageArray count];  
27.         [self setupUI];  
28.     }  
29.     return self;  
30. }  
31.   
32. - (void)setPageControlColor:(UIColor *)color {  
33.     self.pageNumber.currentPageIndicatorTintColor = color;  
34. }  
35.   
36. - (void)setupUI  
37. {  
38.     [self setupScrollView];  
39.       
40.     [self setupPageControl];  
41. }  
42. - (void)setupScrollView  
43. {  
44.     self.imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, imageWidth, imageHight)];  
45.     _imageScrollView.bounces = NO;  
46.     _imageScrollView.pagingEnabled = YES;  
47.     _imageScrollView.contentOffset = CGPointMake(imageWidth, 0);  
48.     _imageScrollView.contentSize = CGSizeMake(imageWidth*(imageCount+2),imageHight);  
49.     _imageScrollView.showsVerticalScrollIndicator =NO;  
50.     _imageScrollView.showsHorizontalScrollIndicator = NO;  
51.     _imageScrollView.userInteractionEnabled = YES;  
52.     _imageScrollView.backgroundColor = [UIColor redColor];  
53.     _imageScrollView.delegate = self;  
54.     [self addSubview:_imageScrollView];  
55.     //加载图片  
56.     for (int i = 0; i<imageCount+2; i++) {  
57.         //加载每一张图片  
58.         if (i == 0) {  
59.             //实际上是最后一个位置显示的是第一个图片  
60.             UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:0]];  
61.             imageView.frame = CGRectMake(imageWidth*(imageCount+1), 0, imageWidth, imageHight);  
62.             imageView.userInteractionEnabled = YES;  
63.             //创建手势  
64.             UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];  
65.             [imageView addGestureRecognizer:tap];  
66.             [_imageScrollView addSubview:imageView];  
67.         }else if (i == imageCount +1){  
68.             //实际上是第一个位置显示的是最后一个图片  
69.             UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:(imageCount - 1)]];  
70.             imageView.frame = CGRectMake(0, 0, imageWidth, imageHight);  
71.             imageView.userInteractionEnabled = YES;  
72.             [_imageScrollView addSubview:imageView];  
73.             //创建手势  
74.             UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];  
75.             [imageView addGestureRecognizer:tap];  
76.             [_imageScrollView addSubview:imageView];  
77.         }else if (0< i <=imageCount){  
78.                 //正常的图片显示  
79.             UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:i-1]];  
80.             imageView.frame = CGRectMake(imageWidth*i, 0, imageWidth, imageHight);  
81.             imageView.userInteractionEnabled = YES;  
82.             [_imageScrollView addSubview:imageView];  
83.             //创建手势  
84.             UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];  
85.             [imageView addGestureRecognizer:tap];  
86.             [_imageScrollView addSubview:imageView];  
87.     }  
88.   
89.     }  
90.   
91. }  
92. - (void)tapImage{  
93.     if (self.delegate != nil) {  
94.         [self.delegate tapImageAtIndex:_pageNumber.currentPage];  
95.     }  
96. }  
97.   
98. - (void)setupPageControl  
99. {  
100.     //翻页控件  
101.     _pageNumber = [[UIPageControl alloc]initWithFrame:CGRectMake(imageWidth - 70, imageHight, 70, 20)];  
102.     _pageNumber.numberOfPages = imageCount;  
103.     _pageNumber.currentPage = 0;  
104.     [_pageNumber addTarget:self action:@selector(pageAction) forControlEvents:UIControlEventTouchUpInside];  
105.     _pageNumber.pageIndicatorTintColor = [UIColor grayColor];//选择的点的颜色  
106.     _pageNumber.currentPageIndicatorTintColor = [UIColor blackColor];//已选择的点的颜色  
107.     [self addSubview:_pageNumber];  
108.   
109. }  
110.   
111. -(void)pageAction  
112. {  
113.     int page = _pageNumber.currentPage;  
114.     [_imageScrollView setContentOffset:CGPointMake(imageWidth * (page+1), 0)];  
115. }  
116. #pragma scrollView代理方法  
117. - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView  
118. {  
119.     int currentPage = (_imageScrollView.contentOffset.x - _imageScrollView.frame.size.width  
120.                        / ([_imageArray count]+2)) / _imageScrollView.frame.size.width + 1;  
121.     //NSLog(@"%d",currentPage);  
122.     if (currentPage==0) {  
123.         [_imageScrollView scrollRectToVisible:CGRectMake(imageWidth*imageCount, 0, imageWidth, imageHight) animated:NO];  
124.     }  
125.     else if (currentPage==([_imageArray count]+1)) {  
126.         //如果是最后+1,也就是要开始循环的第一个  
127.         [_imageScrollView scrollRectToVisible:CGRectMake(imageWidth, 0, imageWidth, imageHight) animated:NO];  
128.     }  
129. }  
130. - (void)scrollViewDidScroll:(UIScrollView *)sender  
131. {  
132.     _pageNumber.currentPage = _imageScrollView.contentOffset.x/imageWidth-1;  
133. }  
134.   
135.   
136. @end  

http://download.csdn.net/detail/u013082522/6945667  源代码示例如下

• 上一篇UIScrollView属性全总结
• 下一篇view移除所有子视图

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