轮播图封装

使用:

//

//  ViewController.m

//  Lesson_CarouselFigureView

//

//  Created by Floating_SH on 15/12/12.

//  Copyright © 2015年 SH. All rights reserved.

//

#import "ViewController.h"

#import "SHCarouselFigureView.h"

@interface ViewController ()<SHCarouselFigureViewDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    NSMutableArray *array = [[NSMutableArray alloc]initWithCapacity:9];

    for(int i = 1; i < 10;i++){

        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i]];

        [array addObject:image];

    }

    SHCarouselFigureView *carouselView = [[SHCarouselFigureView alloc]initWithFrame:self.view.bounds];

    carouselView.duration = 3;

    carouselView.delegate = self;

    carouselView.images = array;

    [self.view addSubview:carouselView];

    

    

}

- (void)carouselFigureViewDidCarousel:(SHCarouselFigureView *)carouselFigureView withIndex:(NSUInteger)index{

    

    NSLog(@"%lu",index);

}

----------------------------以上为使用该轮播图----------------------------------

//

//  SHCarouselFigureView.h

//  Lesson_CarouselFigureView

//

//  Created by Floating_SH on 15/12/12.

//  Copyright © 2015年 SH. All rights reserved.

//

#import <UIKit/UIKit.h>

@class SHCarouselFigureView;

@protocol SHCarouselFigureViewDelegate <NSObject>

/**

 *  轮播图被点击时触发的代理方法

 *

 *  @param carouselFigureView 轮播图本身

 *  @param index              传递给外界的下标

 */

- (void)carouselFigureViewDidCarousel:(SHCarouselFigureView *)carouselFigureView withIndex:(NSUInteger)index;

@end

@interface SHCarouselFigureView : UIView

/**

 *  图片数组,外界赋值轮播图片的时候使用,或者获取轮播图片时使用

 */

@property (strong,nonatomic) NSArray *images;

/**

 *  图片切换间隔

 */

@property (assign,nonatomic) NSTimeInterval duration;//default is2.0

/**

 *  当前下标

 */

@property (assign,nonatomic) NSUInteger currentIndex;

/**

 *  代理对象

 */

@property (weak,nonatomic) id<SHCarouselFigureViewDelegate> delegate;

@end

//

//  SHCarouselFigureView.m

//  Lesson_CarouselFigureView

//

//  Created by Floating_SH on 15/12/12.

//  Copyright © 2015年 SH. All rights reserved.

//

#import "SHCarouselFigureView.h"

@interface SHCarouselFigureView ()<UIScrollViewDelegate>

//轮播图的三个重要元素

@property (strong ,nonatomic) UIScrollView *scrollView;

@property (strong ,nonatomic) UIPageControl *pageControl;

/**

 *  驱动轮播的Timer

 */

@property (strong ,nonatomic) NSTimer *timer;

@end

@implementation SHCarouselFigureView

//每个视图都有这个初始化方法

- (instancetype)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        

        _duration = 2;

        //在初始化的时候初始化timer,如果在外界给图片的时候在初始化timer会出错

        _timer = [NSTimer new];

    }

    return self;

}

//NSTimeInterval -->double类型

- (void)setDuration:(NSTimeInterval)duration{

    

    [self.timer invalidate];

    self.timer = nil;

    _duration = duration;

    self.timer = [NSTimer scheduledTimerWithTimeInterval:_duration target:self selector:@selector(carouselAction:) userInfo:self repeats:YES];//userInfo可以传递(传递的是后面的参数)

}

//一旦外界赋值就会触发set方法

/**

 *  images的setter,当对图片数组赋值时触发

 *

 *  @param images 图片数组

 */

- (void)setImages:(NSArray *)images{

    

    //让Timer停止并且为空

    [self.timer invalidate];

    self.timer = nil;

    

    if(_images != images){

        _images = nil;

        _images = images;

    }

    //在外界对图片数组进行赋值的时候,开始绘图

    [self drawView];

    

    //在外界对图片数组进行赋值的时候,启动Timer

    self.timer = [NSTimer scheduledTimerWithTimeInterval:self.duration target:self selector:@selector(carouselAction:) userInfo:self repeats:YES];

    

}

//绘制视图的方法

- (void)drawView{

    

    //完成添加就可以,其他的放在懒加载中

    [self addSubview:self.scrollView];

    [self addSubview:self.pageControl];

}

//当前视图宽度

#define kWidth self.bounds.size.width

//当前视图高度

#define kHeight self.bounds.size.height

//当前图片个数

#define kCount self.images.count

//懒加载ScrollView

- (UIScrollView *)scrollView{

    

    if (nil == _scrollView) {

        //frame用外界传来的frame

        _scrollView = [[UIScrollView alloc]initWithFrame:self.bounds];

        

        [_scrollView setBounces:NO];//设置反弹

        [_scrollView setPagingEnabled:YES];//设置滚动

        [_scrollView setShowsHorizontalScrollIndicator:NO];

        [_scrollView setShowsVerticalScrollIndicator:NO];

        [_scrollView setContentSize:CGSizeMake(kWidth * kCount, kHeight)];

        [_scrollView setDelegate:self];

        //添加图片视图

        for (int i = 0; i < kCount; i ++) {

            

            UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(i * kWidth, 0, kWidth, kHeight)];

            imgView.image = self.images[i];

            imgView.userInteractionEnabled = YES;

            imgView.tag = 1000 + i;

            UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handlTapActionInImageView:)];

            [imgView addGestureRecognizer:tap];

            

            [_scrollView addSubview:imgView];

        }

    }

    

    return _scrollView;

}

//懒加载PageControl

#define kGap 10

#define kPageControlHeight 29

- (UIPageControl *)pageControl{

    

    if (! _pageControl) {

        _pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0, 0, kWidth, kPageControlHeight)];

        [_pageControl setCenter:CGPointMake(kWidth / 2, kHeight - kPageControlHeight / 2)];

        [_pageControl setBackgroundColor:[UIColor whiteColor]];

        [_pageControl setPageIndicatorTintColor:[UIColor lightGrayColor]];

        [_pageControl setCurrentPageIndicatorTintColor:[UIColor redColor]];

        [_pageControl setNumberOfPages:kCount];

        [_pageControl setHidesForSinglePage:YES];//剩余一个隐藏

    }

    return _pageControl;

}

#pragma mark --- Timer 驱动轮播机制 ---

//timer的方法没有返回值

- (void)carouselAction:(id)sender{

    

    //每次方法执行的时候,"当前页" + 1

    self.currentIndex ++;

    

    //越界判断

    if(self.currentIndex == kCount){

        self.currentIndex = 0;

    }

    //根据"当前页"这一属性来设置pageControl显示第几个圆点

    self.pageControl.currentPage = self.currentIndex;

    //根据"当前页"这一属性来设置ScrollView的偏移量

    self.scrollView.contentOffset = CGPointMake(kWidth * self.currentIndex, 0);

}

#pragma mark --- UIScrollViewDelegate ---

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{

    

    //开始拖拽时,Timer驱动机制停止

    [self.timer invalidate];

    self.timer = nil;

    

}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

    

    //根据视图偏移矫正当前下标

    self.currentIndex = scrollView.contentOffset.x / kWidth;

    //根据新的下标校正pageControl的currentPage

    self.pageControl.currentPage = self.currentIndex;

    

    

    //停止减速后启动Timer

    self.timer = [NSTimer scheduledTimerWithTimeInterval:self.duration target:self selector:@selector(carouselAction:) userInfo:self repeats:YES];

}

#pragma mark -- Tap 手势 ---

- (void)handlTapActionInImageView:(UITapGestureRecognizer *)tap{

    

    

    //通过获取imgView.image在数组的下标

//    //获取所点击的视图

//    UIImageView *imgView = (UIImageView *)tap.view;

//    //获取对应下标

//    NSUInteger index = [self.images indexOfObject:imgView.image];

    

    

    //通过tag值获取对应下标

    //获取所点击的视图

    UIImageView *imgView = (UIImageView *)tap.view;

    //获取对应下标

    NSUInteger index = imgView.tag - 1000;

    

    

    //当手势触发时,代理对象执行代理方法

    //将当前视图和当前下标携带给外界

    

    if(_delegate && [_delegate respondsToSelector:@selector(carouselFigureViewDidCarousel:withIndex:)]){

        

        [_delegate carouselFigureViewDidCarousel:self withIndex:index];

        //这里不能传self.currentIndex  因为有偏差

    }

    

}

@end