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