IOS项目之图片轮播

今天做小区宝时,用到一个第三方ImagePlayerView用来做图片轮播,用着感觉非常爽, 这里就记录一下,感谢作者。

//
//  ImagePlayerView.h
//  ImagePlayerView
//
//  Created by 陈颜俊 on 14-6-5.
//  Copyright (c) 2014年 Chenyanjun. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSInteger, ICPageControlPosition) {
    ICPageControlPosition_TopLeft,
    ICPageControlPosition_TopCenter,
    ICPageControlPosition_TopRight,
    ICPageControlPosition_BottomLeft,
    ICPageControlPosition_BottomCenter,
    ICPageControlPosition_BottomRight
};

@protocol ImagePlayerViewDelegate;

@interface ImagePlayerView : UIView
@property (nonatomic, assign) id<ImagePlayerViewDelegate> imagePlayerViewDelegate;
@property (nonatomic, assign) BOOL autoScroll;  // default is YES, set NO to turn off autoScroll
@property (nonatomic, assign) NSUInteger scrollInterval;    // scroll interval, unit: second, default is 2 seconds
@property (nonatomic, assign) ICPageControlPosition pageControlPosition;    // pageControl position, defautl is bottomright
@property (nonatomic, assign) BOOL hidePageControl; // hide pageControl, default is NO

/**
 *  Init image player
 *
 *  @param imageURLs   NSURL array, image path
 *  @param placeholder placeholder image
 *  @param delegate    delegate
 *  @deprecated use - (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate instead
 */
- (void)initWithImageURLs:(NSArray *)imageURLs placeholder:(UIImage *)placeholder delegate:(id<ImagePlayerViewDelegate>)delegate DEPRECATED_ATTRIBUTE;

/**
 *  Init image player
 *
 *  @param imageURLs   NSURL array, image path
 *  @param placeholder placeholder image
 *  @param delegate    delegate
 *  @param edgeInsets  scroll view edgeInsets
 *  @deprecated use - (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets instead
 */
- (void)initWithImageURLs:(NSArray *)imageURLs placeholder:(UIImage *)placeholder delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets DEPRECATED_ATTRIBUTE;

/**
 *  Init image player
 *
 *  @param count
 *  @param delegate
 */
- (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate;

/**
 *  Init image player
 *
 *  @param count
 *  @param delegate
 *  @param edgeInsets scroll view edgeInsets
 */
- (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets;
@end

@protocol ImagePlayerViewDelegate <NSObject>

@required
/**
 *  Init imageview
 *
 *  @param imagePlayerView ImagePlayerView object
 *  @param imageView       UIImageView object
 *  @param index           index of imageview
 */
- (void)imagePlayerView:(ImagePlayerView *)imagePlayerView loadImageForImageView:(UIImageView *)imageView index:(NSInteger)index;

@optional
/**
 *  Tap ImageView action
 *
 *  @param imagePlayerView ImagePlayerView object
 *  @param index           index of imageview
 *  @param imageURL        image url
 *  @deprecated use - (void)imagePlayerView:(ImagePlayerView *)imagePlayerView didTapAtIndex:(NSInteger)index instead
 */
- (void)imagePlayerView:(ImagePlayerView *)imagePlayerView didTapAtIndex:(NSInteger)index imageURL:(NSURL *)imageURL DEPRECATED_ATTRIBUTE;

/**
 *  Tap ImageView action
 *
 *  @param imagePlayerView ImagePlayerView object
 *  @param index           index of imageview
 */
- (void)imagePlayerView:(ImagePlayerView *)imagePlayerView didTapAtIndex:(NSInteger)index;
@end
//
//  ImagePlayerView.m
//  ImagePlayerView
//
//  Created by 陈颜俊 on 14-6-5.
//  Copyright (c) 2014年 Chenyanjun. All rights reserved.
//

#import "ImagePlayerView.h"

#define kStartTag   1000
#define kDefaultScrollInterval  2

@interface ImagePlayerView() <UIScrollViewDelegate>
@property (nonatomic, strong) UIScrollView *scrollView;
//@property (nonatomic, strong) NSArray *imageURLs;
@property (nonatomic, assign) NSInteger count;
@property (nonatomic, strong) NSTimer *autoScrollTimer;
@property (nonatomic, strong) UIPageControl *pageControl;
@property (nonatomic, strong) NSMutableArray *pageControlConstraints;
@end

@implementation ImagePlayerView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self _init];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self _init];
    }
    return self;
}

- (id)init
{
    self = [super init];
    if (self) {
        [self _init];
    }
    return self;
}

- (void)_init
{
    self.scrollInterval = kDefaultScrollInterval;

    // scrollview
    self.scrollView = [[UIScrollView alloc] init];
    [self addSubview:self.scrollView];

    self.scrollView.translatesAutoresizingMaskIntoConstraints = NO;
    self.scrollView.pagingEnabled = YES;
    self.scrollView.bounces = NO;
    self.scrollView.showsHorizontalScrollIndicator = NO;
    self.scrollView.showsVerticalScrollIndicator = NO;
    self.scrollView.directionalLockEnabled = YES;

    self.scrollView.delegate = self;

    // UIPageControl
    self.pageControl = [[UIPageControl alloc] init];
    self.pageControl.translatesAutoresizingMaskIntoConstraints = NO;
    self.pageControl.numberOfPages = self.count;
    self.pageControl.currentPage = 0;
    [self addSubview:self.pageControl];

    NSArray *pageControlVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[pageControl]-0-|"
                                                                               options:kNilOptions
                                                                               metrics:nil
                                                                                 views:@{@"pageControl": self.pageControl}];

    NSArray *pageControlHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[pageControl]-|"
                                                                               options:kNilOptions
                                                                               metrics:nil
                                                                                 views:@{@"pageControl": self.pageControl}];

    self.pageControlConstraints = [NSMutableArray arrayWithArray:pageControlVConstraints];
    [self.pageControlConstraints addObjectsFromArray:pageControlHConstraints];

    [self addConstraints:self.pageControlConstraints];

}

// @deprecated use - (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate instead
- (void)initWithImageURLs:(NSArray *)imageURLs placeholder:(UIImage *)placeholder delegate:(id<ImagePlayerViewDelegate>)delegate
{
    [self initWithCount:imageURLs.count delegate:delegate edgeInsets:UIEdgeInsetsZero];
}

// @deprecated use - (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets instead
- (void)initWithImageURLs:(NSArray *)imageURLs placeholder:(UIImage *)placeholder delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets
{
    [self initWithCount:imageURLs.count delegate:delegate edgeInsets:edgeInsets];
}

- (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate
{
    [self initWithCount:count delegate:delegate edgeInsets:UIEdgeInsetsZero];
}

- (void)initWithCount:(NSInteger)count delegate:(id<ImagePlayerViewDelegate>)delegate edgeInsets:(UIEdgeInsets)edgeInsets
{
    self.count = count;
    self.imagePlayerViewDelegate = delegate;

    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:|-%d-[scrollView]-%d-|", (int)edgeInsets.top, (int)edgeInsets.bottom]
                                                                 options:kNilOptions
                                                                 metrics:nil
                                                                   views:@{@"scrollView": self.scrollView}]];
    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"H:|-%d-[scrollView]-%d-|", (int)edgeInsets.left, (int)edgeInsets.right]
                                                                 options:kNilOptions
                                                                 metrics:nil
                                                                   views:@{@"scrollView": self.scrollView}]];

    if (count == 0) {
        return;
    }

    self.pageControl.numberOfPages = count;
    self.pageControl.currentPage = 0;

    CGFloat startX = self.scrollView.bounds.origin.x;
    CGFloat width = self.bounds.size.width - edgeInsets.left - edgeInsets.right;
    CGFloat height = self.bounds.size.height - edgeInsets.top - edgeInsets.bottom;

    for (int i = 0; i < count; i++) {
        startX = i * width;
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(startX, 0, width, height)];
        imageView.contentMode = UIViewContentModeScaleToFill;
        imageView.tag = kStartTag + i;
        imageView.userInteractionEnabled = YES;
        imageView.translatesAutoresizingMaskIntoConstraints = NO;
        [imageView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)]];

        [imageView addConstraint:[NSLayoutConstraint constraintWithItem:imageView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:width]];
        [imageView addConstraint:[NSLayoutConstraint constraintWithItem:imageView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:height]];

        [self.imagePlayerViewDelegate imagePlayerView:self loadImageForImageView:imageView index:i];

        [self.scrollView addSubview:imageView];
    }

    // constraint
    NSMutableDictionary *viewsDictionary = [NSMutableDictionary dictionary];
    NSMutableArray *imageViewNames = [NSMutableArray array];
    for (int i = kStartTag; i < kStartTag + count; i++) {
        NSString *imageViewName = [NSString stringWithFormat:@"imageView%d", i - kStartTag];
        [imageViewNames addObject:imageViewName];

        UIImageView *imageView = (UIImageView *)[self.scrollView viewWithTag:i];
        [viewsDictionary setObject:imageView forKey:imageViewName];
    }

    [self.scrollView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:|-0-[%@]-0-|", [imageViewNames objectAtIndex:0]]
                                                                            options:kNilOptions
                                                                            metrics:nil
                                                                              views:viewsDictionary]];

    NSMutableString *hConstraintString = [NSMutableString string];
    [hConstraintString appendString:@"H:|-0"];
    for (NSString *imageViewName in imageViewNames) {
        [hConstraintString appendFormat:@"-[%@]-0", imageViewName];
    }
    [hConstraintString appendString:@"-|"];

    [self.scrollView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:hConstraintString
                                                                            options:NSLayoutFormatAlignAllTop
                                                                            metrics:nil
                                                                              views:viewsDictionary]];

    self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * count, self.scrollView.frame.size.height);
    self.scrollView.contentInset = UIEdgeInsetsZero;
}

- (void)handleTapGesture:(UIGestureRecognizer *)tapGesture
{
    UIImageView *imageView = (UIImageView *)tapGesture.view;
    NSInteger index = imageView.tag - kStartTag;

    if (self.imagePlayerViewDelegate && [self.imagePlayerViewDelegate respondsToSelector:@selector(imagePlayerView:didTapAtIndex:)]) {
        [self.imagePlayerViewDelegate imagePlayerView:self didTapAtIndex:index];
    }
}

#pragma mark - auto scroll
- (void)setAutoScroll:(BOOL)autoScroll
{
    _autoScroll = autoScroll;

    if (autoScroll) {
        if (!self.autoScrollTimer || !self.autoScrollTimer.isValid) {
            self.autoScrollTimer = [NSTimer scheduledTimerWithTimeInterval:self.scrollInterval target:self selector:@selector(handleScrollTimer:) userInfo:nil repeats:YES];
        }
    } else {
        if (self.autoScrollTimer && self.autoScrollTimer.isValid) {
            [self.autoScrollTimer invalidate];
            self.autoScrollTimer = nil;
        }
    }
}

- (void)setScrollInterval:(NSUInteger)scrollInterval
{
    _scrollInterval = scrollInterval;

    if (self.autoScrollTimer && self.autoScrollTimer.isValid) {
        [self.autoScrollTimer invalidate];
        self.autoScrollTimer = nil;
    }

    self.autoScrollTimer = [NSTimer scheduledTimerWithTimeInterval:self.scrollInterval target:self selector:@selector(handleScrollTimer:) userInfo:nil repeats:YES];
}

- (void)handleScrollTimer:(NSTimer *)timer
{
    if (self.count == 0) {
        return;
    }

    NSInteger currentPage = self.pageControl.currentPage;
    NSInteger nextPage = currentPage + 1;
    if (nextPage == self.count) {
        nextPage = 0;
    }

    BOOL animated = YES;
    if (nextPage == 0) {
        animated = NO;
    }

    UIImageView *imageView = (UIImageView *)[self.scrollView viewWithTag:(nextPage + kStartTag)];
    [self.scrollView scrollRectToVisible:imageView.frame animated:animated];

    self.pageControl.currentPage = nextPage;
}

#pragma mark - scroll delegate
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    // disable v direction scroll
    if (scrollView.contentOffset.y > 0) {
        [scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x, 0)];
    }
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    // when user scrolls manually, stop timer and start timer again to avoid next scroll immediatelly
    if (self.autoScrollTimer && self.autoScrollTimer.isValid) {
        [self.autoScrollTimer invalidate];
    }
    self.autoScrollTimer = [NSTimer scheduledTimerWithTimeInterval:self.scrollInterval target:self selector:@selector(handleScrollTimer:) userInfo:nil repeats:YES];

    // update UIPageControl
    CGRect visiableRect = CGRectMake(scrollView.contentOffset.x, scrollView.contentOffset.y, scrollView.bounds.size.width, scrollView.bounds.size.height);
    NSInteger currentIndex = 0;
    for (UIImageView *imageView in scrollView.subviews) {
        if ([imageView isKindOfClass:[UIImageView class]]) {
            if (CGRectContainsRect(visiableRect, imageView.frame)) {
                currentIndex = imageView.tag - kStartTag;
                break;
            }
        }
    }

    self.pageControl.currentPage = currentIndex;
}

#pragma mark -
- (void)setPageControlPosition:(ICPageControlPosition)pageControlPosition
{
    NSString *vFormat = nil;
    NSString *hFormat = nil;

    switch (pageControlPosition) {
        case ICPageControlPosition_TopLeft: {
            vFormat = @"V:|-0-[pageControl]";
            hFormat = @"H:|-[pageControl]";
            break;
        }

        case ICPageControlPosition_TopCenter: {
            vFormat = @"V:|-0-[pageControl]";
            hFormat = @"H:|[pageControl]|";
            break;
        }

        case ICPageControlPosition_TopRight: {
            vFormat = @"V:|-0-[pageControl]";
            hFormat = @"H:[pageControl]-|";
            break;
        }

        case ICPageControlPosition_BottomLeft: {
            vFormat = @"V:[pageControl]-0-|";
            hFormat = @"H:|-[pageControl]";
            break;
        }

        case ICPageControlPosition_BottomCenter: {
            vFormat = @"V:[pageControl]-0-|";
            hFormat = @"H:|[pageControl]|";
            break;
        }

        case ICPageControlPosition_BottomRight: {
            vFormat = @"V:[pageControl]-0-|";
            hFormat = @"H:[pageControl]-|";
            break;
        }

        default:
            break;
    }

    [self removeConstraints:self.pageControlConstraints];

    NSArray *pageControlVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:vFormat
                                                                               options:kNilOptions
                                                                               metrics:nil
                                                                                 views:@{@"pageControl": self.pageControl}];

    NSArray *pageControlHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:hFormat
                                                                               options:kNilOptions
                                                                               metrics:nil
                                                                                 views:@{@"pageControl": self.pageControl}];

    [self.pageControlConstraints removeAllObjects];
    [self.pageControlConstraints addObjectsFromArray:pageControlVConstraints];
    [self.pageControlConstraints addObjectsFromArray:pageControlHConstraints];

    [self addConstraints:self.pageControlConstraints];
}

- (void)setHidePageControl:(BOOL)hidePageControl
{
    self.pageControl.hidden = hidePageControl;
}
@end

用的时候要首先引入类库ImageIO.framework

初始化View

 self.imagePlayerView=[[ImagePlayerView alloc]init];
         self.imagePlayerView.frame=CGRectMake(0, 0, self.view.bounds.size.width, 150);
        [self.imagePlayerView initWithCount:self.homeData.adList.count delegate:self];
        self.imagePlayerView.scrollInterval = 3.0f;
        self.imagePlayerView.pageControlPosition = ICPageControlPosition_BottomCenter;
        self.imagePlayerView.hidePageControl = NO;

实现代理ImagePlayerViewDelegate

#pragma mark --- ---ImagePlayerViewDelegate

- (void)imagePlayerView:(ImagePlayerView *)imagePlayerView loadImageForImageView:(UIImageView *)imageView index:(NSInteger)index
{
    AdModel *admodel=[self.homeData.adList objectAtIndex:index];
    NSURL *url=[NSURL URLWithString:admodel.imageUrl];
    imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];
}

- (void)imagePlayerView:(ImagePlayerView *)imagePlayerView didTapAtIndex:(NSInteger)index
{
    NSLog(@"did tap index = %d", (int)index);
}

时间： 2024-10-11 07:07:58

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