https://www.jianshu.com/p/78ef7bc04655
iOS 语音播报
https://blog.csdn.net/JavaME_xie/article/details/80414583

# PushAudio
关于APP上语音播报的完整实现

相关文档请看：https://blog.csdn.net/JavaME_xie/article/details/80414583

/*

转发*********************************************************************************

• 🌟🌟🌟 新建SDCycleScrollView交流QQ群：185534916 🌟🌟🌟
• 在您使用此自动轮播库的过程中如果出现bug请及时以以下任意一种方式联系我们，我们会及时修复bug并
• 帮您解决问题。
• 新浪微博:GSD_iOS
• Email : gsdios@126.com
• GitHub: https://github.com/gsdios
• 另（自动布局库SDAutoLayout）：
• 一行代码搞定自动布局！支持Cell和Tableview高度自适应，Label和ScrollView内容自适应，致力于
• 做最简单易用的AutoLayout库。
• 视频教程：http://www.letv.com/ptv/vplay/24038772.html
• 用法示例：https://github.com/gsdios/SDAutoLayout/blob/master/README.md
• GitHub：https://github.com/gsdios/SDAutoLayout

*/

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

typedef void(^TapActionBlock)(NSInteger index);

@interface BannerView : UIView

/*
  *     images   图片数组
  *     tapBlock  点击事件
  */
+(void)showBannerWithFrame:(CGRect)frame images:(NSArray*)images superView:(UIView *)superView tapBlock:(TapActionBlock)tapBlock;

@end

NS_ASSUME_NONNULL_END

#import "BannerView.h"

@interface BannerView ()<UIScrollViewDelegate>

@property (strong, nonatomic) NSArray *images;
@property (strong, nonatomic) UIScrollView *scrollView;
@property (strong, nonatomic) UIPageControl *pageControl;
@property (copy, nonatomic) TapActionBlock tapBlock;

@end

@implementation BannerView

+(void)showBannerWithFrame:(CGRect)frame images:(nonnull NSArray *)images superView:(nonnull UIView *)superView tapBlock:(nonnull TapActionBlock)tapBlock{
    
    BannerView *banner = [[BannerView alloc]initWithFrame:frame images:images];
    banner.tapBlock = tapBlock;
    [superView addSubview:banner];
}

-(instancetype)initWithFrame:(CGRect)frame images:(NSArray *)images{
    
    self = [super initWithFrame:frame];
    if (self) {
        self.images = images;
        [self addSubview:self.scrollView];
        [self addSubview:self.pageControl];
        [self setBannerView];
        [self setTimer];
    }
    return self;
}

-(void)setTimer{
    
    __weak typeof(self)weakSelf = self;
    [NSTimer scheduledTimerWithTimeInterval:2 repeats:YES block:^(NSTimer * _Nonnull timer) {
       CGFloat x = weakSelf.scrollView.contentOffset.x;
        if (x>=weakSelf.scrollView.contentSize.width) {
            [weakSelf.scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
            [weakSelf.scrollView setContentOffset:CGPointMake(CGRectGetWidth(weakSelf.frame), 0) animated:YES];
            weakSelf.pageControl.currentPage = 0;
        }else{
            [weakSelf.scrollView setContentOffset:CGPointMake(x+CGRectGetWidth(weakSelf.frame), 0) animated:YES];
            weakSelf.pageControl.currentPage = x/CGRectGetWidth(weakSelf.frame);
        }
    }];
}

-(void)setBannerView{
    
//    第一张
    UIImageView *firstImg = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, CGRectGetWidth(self.frame), CGRectGetHeight(self.frame))];
    firstImg.image = [UIImage imageNamed:self.images.lastObject];//最后一张图片
    firstImg.contentMode = UIViewContentModeScaleAspectFill;
    [self.scrollView addSubview:firstImg];
//    中间
    for (NSInteger i=0; i<self.images.count; i++) {
        UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake((CGRectGetWidth(self.frame)*(i+1)), 0, CGRectGetWidth(self.frame), CGRectGetHeight(self.frame))];
        imgView.image = [UIImage imageNamed:self.images[i]];//x中间图片
        imgView.contentMode = UIViewContentModeScaleAspectFill;
        imgView.userInteractionEnabled = YES;
        imgView.tag = i;
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];
        [imgView addGestureRecognizer:tap];
        [self.scrollView addSubview:imgView];
    }
//    最后一张
    UIImageView *lastImg = [[UIImageView alloc]initWithFrame:CGRectMake(CGRectGetWidth(self.frame)+1, 0, CGRectGetWidth(self.frame), CGRectGetHeight(self.frame))];
    lastImg.image = [UIImage imageNamed:self.images.firstObject];//最后一张图片
    lastImg.contentMode = UIViewContentModeScaleAspectFill;
    [self.scrollView addSubview:lastImg];
    
    self.scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.frame)*self.images.count, CGRectGetHeight(self.frame));
    self.scrollView.contentOffset = CGPointMake(CGRectGetWidth(self.frame), 0);
    /// 图片总数
    self.pageControl.numberOfPages = self.images.count;
    self.pageControl.currentPage = 0;
}

-(void)tapAction:(UITapGestureRecognizer*)gester{
    
    self.tapBlock(gester.view.tag);
}

-(UIScrollView *)scrollView{
    
    if (!_scrollView) {
        _scrollView = [[UIScrollView alloc]initWithFrame:self.bounds];
        _scrollView.scrollEnabled = YES;
        _scrollView.pagingEnabled = YES;
        _scrollView.clipsToBounds = YES;
        _scrollView.delegate = self;
        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.frame)*(2+self.images.count), CGRectGetHeight(self.frame));
    }
    return _scrollView;
}

-(UIPageControl *)pageControl{
    
    if (!_pageControl) {
        _pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0, CGRectGetHeight(self.frame)-50, CGRectGetWidth(self.frame), 50)];
        _pageControl.pageIndicatorTintColor = [UIColor lightGrayColor];
        _pageControl.currentPageIndicatorTintColor = [UIColor yellowColor];
    }
    return _pageControl;
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    
    CGFloat offsetX = scrollView.contentOffset.x;
    if (offsetX>=(self.images.count+1)*(CGRectGetWidth(self.frame))) {
        scrollView.contentOffset = CGPointMake(CGRectGetWidth(self.frame), 0);
        self.pageControl.currentPage = 0;
    }else{
        self.pageControl.currentPage = offsetX/CGRectGetWidth(self.frame)-1;
    }
}


@end