Objective-C无限循环轮播器的实现方法

//
// AppDelegate.m
// 无限轮播器
//
// Created by zhangmi on 16/5/16.
// Copyright © 2016年 Paramount Pictures. All rights reserved.
//
#import "ViewController.h"
#import "SNInfiniteScrollView.h"
 
@interface ViewController ()
 
@end
 
@implementation ViewController
 
- (void)viewDidLoad {
 [super viewDidLoad];
 // Do any additional setup after loading the view, typically from a nib.
  
 NSMutableArray * images = [NSMutableArray array];
 for (int i = 0; i 

//
// AppDelegate.m
// 无限轮播器
//
// Created by zhangmi on 16/5/16.
// Copyright © 2016年 Paramount Pictures. All rights reserved.
//
 
#import "SNInfiniteScrollView.h"
 
static int const ImageViewCount = 3;
#define scrollViewWidth self.scrollView.frame.size.width
#define scrollViewHeight self.scrollView.frame.size.height
 
@interface SNInfiniteScrollView () 
 
@property(weak, nonatomic) UIScrollView * scrollView;
@property(weak, nonatomic) NSTimer * timer;
/** pageIndex */
@property(nonatomic, assign) NSInteger pageIndex;
 
@end
 
@implementation SNInfiniteScrollView
 
- (void)setImages:(NSArray *)images {
  
 _images = images;
  
 // 设置页码
 self.pageIndex = 0;
  
 // 设置内容
 [self updateContent];
  
 // 开始定时器
 [self startTimer];
}
 
/** 代码创建的时候调用. */
- (instancetype)initWithFrame:(CGRect)frame {
 if (self = [super initWithFrame:frame]) {
  // 滚动视图
  UIScrollView * scrollView = [[UIScrollView alloc] init];
   
  self.scrollView = scrollView;
  scrollView.delegate = self;
  // scroller属性
  scrollView.showsHorizontalScrollIndicator = NO;
  scrollView.showsVerticalScrollIndicator = NO;
  scrollView.pagingEnabled = YES;
  scrollView.bounces = NO;
  // 添加scrollView
  [self addSubview:scrollView];
   
  // 图片控件
  for (int i = 0; i = self.images.count) {
   pageIndex = 0;
  }
  // 图片角标 赋值给 imageView的tag
  imageView.tag = pageIndex;
  imageView.image = self.images[imageView.tag];
 }
  
 // 设置偏移量在中间 // 不能使用带动画 contentOffset
 if (self.scrollDirection == ScrollDirectionVertical) {
  self.scrollView.contentOffset = CGPointMake(0, scrollViewHeight);
 } else {
  self.scrollView.contentOffset = CGPointMake(scrollViewWidth, 0);
 }
}
#pragma mark - 
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
 // 找出最中间的那个图片控件
 NSInteger page = self.pageIndex;
 CGPoint point = CGPointZero;
 for (int i = 0; i  *)images scrollDirection:(ScrollDirection)scrollDirection pageIndicatorTintColor:(UIColor *)pageIndicatorTintColor currentPageIndicatorTintColor:(UIColor *)currentPageIndicatorTintColor imageViewcontentMode:(UIViewContentMode)imageViewcontentMode {
  
 //=****** 添加自定义scrollView ****************** stone ***
 SNInfiniteScrollView * scrollView = [[SNInfiniteScrollView alloc] init];
 scrollView.frame = frame;
 scrollView.imageViewcontentMode = imageViewcontentMode;
 scrollView.scrollDirection = scrollDirection;
 //=****** 添加image ****************** stone ***
 scrollView.images = images;
 //=****** 添加pageControl ****************** stone ***
 UIPageControl * pageControl = [[UIPageControl alloc] init];
 scrollView.pageControl = pageControl;
 pageControl.enabled = NO;
 pageControl.currentPageIndicatorTintColor = currentPageIndicatorTintColor;
 pageControl.pageIndicatorTintColor = pageIndicatorTintColor;
 pageControl.numberOfPages = scrollView.images.count;
 pageControl.bounds = CGRectMake(0, 0, scrollView.bounds.size.width, 44);
 pageControl.center = CGPointMake(scrollView.bounds.size.width * 0.5, scrollView.bounds.size.height * 0.9);
 [scrollView addSubview:pageControl];
 [superView addSubview:scrollView];
 //=************************ stone ***
 return scrollView;
}
 
@end

文中主要介绍的就是Objective-C无限循环轮播器的实现方法，这些方法都非常简单快捷，是不是觉得很容易呢。