SDCycleScrollView图片轮播器

SDCycleScrollView 是一个简单好用的第三方框架
GitHub链接地址：https://github.com/gsdios/SDCycleScrollView

使用原理：

采用UICollectionView的重用机制和循环滚动的方式实现图片的无限轮播，播放非常顺畅，解决了UISCrollView使用时从最后一张跳到第一张时的生硬状态。

SDCycleScrollView使用方法：

使用cocopods导入，pod 'SDCycleScrollView','~> 1.64'，如果发现pod search SDCycleScrollView 搜索出来的不是最新版本，需要在终端执行cd转换文件路径命令退回到desktop，然后执行pod setup命令更新本地spec缓存（可能需要几分钟），然后再搜索就可以了。
当然你也可以把demo下载下来，手动把需要的库SDCycleScrollView导入目标工程。

SDCycleScrollView处理图片时用到了SDWebImage做图片缓存，所以工程中需要导入第三方库SDWebImage。把准备工作做完后，接下来就相当爽了，只需要调用几行代码，一个图片轮播器便可以轻松搞定。废话不多说直接上代码：

#import "ViewController.h"  
#import "SDCycleScrollView.h"  

@interface ViewController ()   

@end  

@implementation ViewController  

- (void)viewDidLoad {  
[super viewDidLoad];  
  
self.view.backgroundColor = [UIColor colorWithRed:0.98 green:0.98 blue:0.98 alpha:0.99];  
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"005.jpg"]];  
backgroundView.frame = self.view.bounds;  
[self.view addSubview:backgroundView];  
  
UIScrollView *demoContainerView = [[UIScrollView alloc] initWithFrame:self.view.frame];  
demoContainerView.contentSize = CGSizeMake(self.view.frame.size.width, 1200);  
[self.view addSubview:demoContainerView];  
  
self.title = @"轮播Demo";  

  
// 情景一：采用本地图片实现  
NSArray *imageNames = @[@"h1.jpg",  
                        @"h2.jpg",  
                        @"h3.jpg",  
                        @"h4.jpg",  
                        @"h7" // 本地图片请填写全名  
                        ];  
  
// 情景二：采用网络图片实现  
NSArray *imagesURLStrings = @[  
                       @"https://ss2.baidu.com/-vo3dSag_xI4khGko9WTAnF6hhy/super/whfpf%3D425%2C260%2C50/sign=a4b3d7085dee3d6d2293d48b252b5910/0e2442a7d933c89524cd5cd4d51373f0830200ea.jpg",  
                       @"https://ss0.baidu.com/-Po3dSag_xI4khGko9WTAnF6hhy/super/whfpf%3D425%2C260%2C50/sign=a41eb338dd33c895a62bcb3bb72e47c2/5fdf8db1cb134954a2192ccb524e9258d1094a1e.jpg",  
                       @"http://c.hiphotos.baidu.com/image/w%3D400/sign=c2318ff84334970a4773112fa5c8d1c0/b7fd5266d0160924c1fae5ccd60735fae7cd340d.jpg"  
                       ];  
  
// 情景三：图片配文字  
NSArray *titles = @[@" ",  
                    @"感谢您的支持，如果下载的",  
                    @"如果代码在使用过程中出现问题",  
                    @"您可以发邮件到[email protected]"  
                    ];  
  
CGFloat w = self.view.bounds.size.width;  
  
  

// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图1 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  
  
// 本地加载 --- 创建不带标题的图片轮播器  
SDCycleScrollView *cycleScrollView = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 64, w, 180) shouldInfiniteLoop:YES imageNamesGroup:imageNames];  
cycleScrollView.delegate = self;  
cycleScrollView.pageControlStyle = SDCycleScrollViewPageContolStyleAnimated;  
[demoContainerView addSubview:cycleScrollView];  
cycleScrollView.scrollDirection = UICollectionViewScrollDirectionVertical;  
//         --- 轮播时间间隔，默认1.0秒，可自定义  
//cycleScrollView.autoScrollTimeInterval = 4.0;  
  
  
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图2 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  
  
// 网络加载 --- 创建带标题的图片轮播器  
SDCycleScrollView *cycleScrollView2 = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 280, w, 180) delegate:self placeholderImage:[UIImage imageNamed:@"placeholder"]];  
  
cycleScrollView2.pageControlAliment = SDCycleScrollViewPageContolAlimentRight;  
cycleScrollView2.titlesGroup = titles;  
cycleScrollView2.currentPageDotColor = [UIColor whiteColor]; // 自定义分页控件小圆标颜色  
[demoContainerView addSubview:cycleScrollView2];  
  
//         --- 模拟加载延迟  
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{  
    cycleScrollView2.imageURLStringsGroup = imagesURLStrings;  
});  
  
/* 
 block监听点击方式 
  
 cycleScrollView2.clickItemOperationBlock = ^(NSInteger index) { 
    NSLog(@">>>>>  %ld", (long)index); 
 }; 
  
 */  
  
  
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图3 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  
  
// 网络加载 --- 创建自定义图片的pageControlDot的图片轮播器  
SDCycleScrollView *cycleScrollView3 = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 500, w, 180) delegate:self placeholderImage:[UIImage imageNamed:@"placeholder"]];  
cycleScrollView3.currentPageDotImage = [UIImage imageNamed:@"pageControlCurrentDot"];  
cycleScrollView3.pageDotImage = [UIImage imageNamed:@"pageControlDot"];  
cycleScrollView3.imageURLStringsGroup = imagesURLStrings;  
  
[demoContainerView addSubview:cycleScrollView3];  
  
}  


#pragma mark - SDCycleScrollViewDelegate  

- (void)cycleScrollView:(SDCycleScrollView *)cycleScrollView didSelectItemAtIndex:(NSInteger)index  
{  
NSLog(@"---点击了第%ld张图片", (long)index);  
  
[self.navigationController pushViewController:[NSClassFromString(@"DemoVCWithXib") new] animated:YES];  
}  


/* 

// 滚动到第几张图回调 
- (void)cycleScrollView:(SDCycleScrollView *)cycleScrollView didScrollToIndex:(NSInteger)index 
{ 
NSLog(@">>>>>> 滚动到第%ld张图", (long)index); 
} 

 */  

@end  

具体实现还需要你自己去实践，这篇文章如果对你有帮助或启发，可以留言一起交流。
当然也可以给我发邮件：[email protected]