for (int i = 0; i < totalCount; i++) {
    UIImageView *imageView = [[UIImageView alloc] init];
    //        图片X
    CGFloat imageX = i * imageW;
    //        设置frame
    imageView.frame = CGRectMake(imageX, imageY, imageW, imageH);
    //        设置图片
    NSString *name = [NSString stringWithFormat:@"公交宣传语%d.jpg", i + 1];
    
    imageView.image = [UIImage imageNamed:name];
    imageView.tag = i;
    imageView.userInteractionEnabled=YES;
    UITapGestureRecognizer *singleTap =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(onClickImage:)];
    [imageView addGestureRecognizer:singleTap];
    
    //imageView.contentMode = UIViewContentModeScaleAspectFit;
    //        隐藏指示条
    self.scrollview.showsHorizontalScrollIndicator = NO;
    
    [self.scrollview addSubview:imageView];
}



-(void)onClickImage:(UITapGestureRecognizer *)recognizer
{
    UIImageView* imageView = (UIImageView*)[recognizer view];
    for (int i=0; i<4; i++) {
        if(imageView.tag == i)
            NSLog(@"图片%d被点击!",i);
    } 
}