iOS 简单快速开发图片轮播器(第三方SDCycleScrollView)

一：关于图片轮播器

以前都是自己写图片轮播器，可以使UIiscrollerView也可以使用UIcollectionView，但是不管是使用UIiscrollerView还是使用UIcollectionView实现过程都略显繁琐，今天给大家介绍一个简单好用的第三方框架SDCycleScrollView来实现图片轮播器。GitHub链接地址：https://github.com/gsdios/SDCycleScrollView  。

二：SDCycleScrollView使用方法

（1）可以使用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。

（2）也可以把demo下载下来，手动把需要的库SDCycleScrollView导入目标工程，如下：

打开下载的demo，把SDCycleScrollView库，拖入目标工程，如下图：

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：

 //
 //  ViewController.m
 //  SDCycleScrollView
 //
 //  Created by aier on 15-3-22.
 //  Copyright (c) 2015年 GSD. All rights reserved.
 //


 #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 = @[@"新建交流QQ群：185534916 ",
                         @"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