第二次弹出browser时小图也会出现

[phoenixin]

您好！第一次点击小图弹出正常，点击图片dismiss之后再次点击小图，小图也会出现在屏幕上，点击大图使其dismiss没有了动画效果。
代码如下：
`_taskImgThumbnail = [[UIImageView alloc] init];
//先截取原图正方形图片，再转化为200宽缩略图，转化为50的话图片模糊
_taskImgThumbnail.image = [self thumbnailWithImage:[self thumbnailCenterImage:[UIImage imageNamed:@"IMG_0065"] centerInSize:CGSizeMake([UIImage imageNamed:@"IMG_0065"].size.width, [UIImage imageNamed:@"IMG_0065"].size.width)] size:CGSizeMake(200,200)];
[self.view addSubview:_taskImgThumbnail];
[_taskImgThumbnail mas_makeConstraints:^(MASConstraintMaker make) {
make.centerX.equalTo(taskImgTip);
make.top.equalTo(taskImgTip.bottom).offset(7WIDTHRATE);
make.size.equalTo(CGSizeMake(50WIDTHRATE, 50WIDTHRATE));
}];

_tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(taskImgTapEvent:)];
_tap.delegate = self;
_taskImgThumbnail.userInteractionEnabled = YES;
[_taskImgThumbnail addGestureRecognizer:_tap];

_picBrowser = [[ESPictureBrowser alloc] init];
_picBrowser.delegate = self;

#pragma mark -- 点击手势触发的事件

• (void)taskImgTapEvent:(UITapGestureRecognizer *)pan{
  NSLog(@"dianji");
  [_picBrowser showFromView:_taskImgThumbnail picturesCount:1 currentPictureIndex:0];
  }

#pragma mark - 图片查看

• (UIView *)pictureView:(ESPictureBrowser )pictureBrowser viewForIndex:(NSInteger)index {
  return _taskImgThumbnail;
  }
  /

• (CGSize)pictureView:(ESPictureBrowser )pictureBrowser imageSizeForIndex:(NSInteger)index {
  return CGSizeMake(DEVICEWIDTH, DEVICEHEIGHT);
  }/

• (UIImage *)pictureView:(ESPictureBrowser *)pictureBrowser defaultImageForIndex:(NSInteger)index {
  return [UIImage imageNamed:@"pic01"];
  }

• (NSString *)pictureView:(ESPictureBrowser *)pictureBrowser highQualityUrlStringForIndex:(NSInteger)index {
  return @"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1490603248787&di=34c3c9dbbfc54f7f004977c5ae716b3e&imgtype=0&src=http%3A%2F%2Fbbs.crsky.com%2F1236983883%2FMon_1208%2F25_187069_d3846bd52f4f0fa.jpg";
  }`

初始界面

第一次点击小图弹出

第二次点击小图弹出

滑动dismiss时

滑动dismiss后再弹出