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

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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.

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以下为.h文件

#import <UIKit/UIKit.h>

@protocol ImageScrollViewDelegate <NSObject>

- (void)tapImageAtIndex:(int)index;

@end
@interface ImageScrollView : UIView<UIScrollViewDelegate,UIGestureRecognizerDelegate>

@property(nonatomic,assign)id<ImageScrollViewDelegate>delegate;

- (id)initWithFrame:(CGRect)frame imageDataArr:(NSArray *)imageDataArr;

- (void)setPageControlColor:(UIColor *)color;//外界传颜色参数

@end

以下为.m文件

#import "ImageScrollView.h"
@interface ImageScrollView ()
{
    int imageHight;
    
    int imageWidth;
    
    int imageCount;
}
@property(nonatomic,retain)UIScrollView *imageScrollView;

@property(nonatomic,strong)UIPageControl *pageNumber;

@property(nonatomic,retain)NSArray *imageArray;

@end
@implementation ImageScrollView

- (id)initWithFrame:(CGRect)frame imageDataArr:(NSArray *)imageDataArr
{
    self = [super initWithFrame:frame];
    if (self) {
        imageHight = self.frame.size.height-20;
        imageWidth = self.frame.size.width;
        self.imageArray = [NSArray arrayWithArray:imageDataArr];
        imageCount = [self.imageArray count];
        [self setupUI];
    }
    return self;
}

- (void)setPageControlColor:(UIColor *)color {
    self.pageNumber.currentPageIndicatorTintColor = color;
}

- (void)setupUI
{
    [self setupScrollView];
    
    [self setupPageControl];
}
- (void)setupScrollView
{
    self.imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, imageWidth, imageHight)];
    _imageScrollView.bounces = NO;
    _imageScrollView.pagingEnabled = YES;
    _imageScrollView.contentOffset = CGPointMake(imageWidth, 0);
    _imageScrollView.contentSize = CGSizeMake(imageWidth*(imageCount+2),imageHight);
    _imageScrollView.showsVerticalScrollIndicator =NO;
    _imageScrollView.showsHorizontalScrollIndicator = NO;
    _imageScrollView.userInteractionEnabled = YES;
    _imageScrollView.backgroundColor = [UIColor redColor];
    _imageScrollView.delegate = self;
    [self addSubview:_imageScrollView];
    //加载图片
    for (int i = 0; i<imageCount+2; i++) {
        //加载每一张图片
        if (i == 0) {
            //实际上是最后一个位置显示的是第一个图片
            UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:0]];
            imageView.frame = CGRectMake(imageWidth*(imageCount+1), 0, imageWidth, imageHight);
            imageView.userInteractionEnabled = YES;
            //创建手势
            UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];
            [imageView addGestureRecognizer:tap];
            [_imageScrollView addSubview:imageView];
        }else if (i == imageCount +1){
            //实际上是第一个位置显示的是最后一个图片
            UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:(imageCount - 1)]];
            imageView.frame = CGRectMake(0, 0, imageWidth, imageHight);
            imageView.userInteractionEnabled = YES;
            [_imageScrollView addSubview:imageView];
            //创建手势
            UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];
            [imageView addGestureRecognizer:tap];
            [_imageScrollView addSubview:imageView];
        }else if (0< i <=imageCount){
                //正常的图片显示
            UIImageView *imageView = [[UIImageView alloc] initWithImage:(UIImage *)[_imageArray objectAtIndex:i-1]];
            imageView.frame = CGRectMake(imageWidth*i, 0, imageWidth, imageHight);
            imageView.userInteractionEnabled = YES;
            [_imageScrollView addSubview:imageView];
            //创建手势
            UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];
            [imageView addGestureRecognizer:tap];
            [_imageScrollView addSubview:imageView];
    }

    }

}
- (void)tapImage{
    if (self.delegate != nil) {
        [self.delegate tapImageAtIndex:_pageNumber.currentPage];
    }
}

- (void)setupPageControl
{
    //翻页控件
    _pageNumber = [[UIPageControl alloc]initWithFrame:CGRectMake(imageWidth - 70, imageHight, 70, 20)];
    _pageNumber.numberOfPages = imageCount;
    _pageNumber.currentPage = 0;
    [_pageNumber addTarget:self action:@selector(pageAction) forControlEvents:UIControlEventTouchUpInside];
    _pageNumber.pageIndicatorTintColor = [UIColor grayColor];//选择的点的颜色
    _pageNumber.currentPageIndicatorTintColor = [UIColor blackColor];//已选择的点的颜色
    [self addSubview:_pageNumber];

}

-(void)pageAction
{
    int page = _pageNumber.currentPage;
    [_imageScrollView setContentOffset:CGPointMake(imageWidth * (page+1), 0)];
}
#pragma scrollView代理方法
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    int currentPage = (_imageScrollView.contentOffset.x - _imageScrollView.frame.size.width
                       / ([_imageArray count]+2)) / _imageScrollView.frame.size.width + 1;
    //NSLog(@"%d",currentPage);
    if (currentPage==0) {
        [_imageScrollView scrollRectToVisible:CGRectMake(imageWidth*imageCount, 0, imageWidth, imageHight) animated:NO];
    }
    else if (currentPage==([_imageArray count]+1)) {
        //如果是最后+1,也就是要开始循环的第一个
        [_imageScrollView scrollRectToVisible:CGRectMake(imageWidth, 0, imageWidth, imageHight) animated:NO];
    }
}
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
    _pageNumber.currentPage = _imageScrollView.contentOffset.x/imageWidth-1;
}


@end

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