- (IBAction)clickButton:(UIButton *)sender{
switch (sender.tag) {
    case 0:{//从相册选择一张
        WHC_PictureListVC  * vc = [WHC_PictureListVC new];
        vc.delegate = self;
        vc.choiceMorePicture = NO;
        [self presentViewController:[[UINavigationController alloc]initWithRootViewController:vc] animated:YES completion:nil];
    }
    break;
    case 1:{//从相册选择多张
        WHC_PictureListVC  * vc = [WHC_PictureListVC new];
        vc.delegate = self;
        vc.choiceMorePicture = YES;
        [self presentViewController:[[UINavigationController alloc]initWithRootViewController:vc] animated:YES completion:nil];
    }
    break;
    case 2:{//从相机选择
        WHC_CameraVC * vc = [WHC_CameraVC new];
        vc.delegate = self;
        [self presentViewController:vc animated:YES completion:nil];
    }
    break;
    default:
    break;
    }
}

//下面是代理实现在代理里面显示所选图片

#pragma mark - WHC_ChoicePictureVCDelegate
- (void)WHCChoicePictureVC:(WHC_ChoicePictureVC *)choicePictureVC didSelectedPhotoArr:(NSArray *)photoArr{
    for (UIView * subView in _imageSV.subviews) {
        if([subView isKindOfClass:[UIImageView class]]){
        [subView removeFromSuperview];
    }
}
    for (NSInteger i = 0; i < photoArr.count; i++) {
        UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(i * CGRectGetWidth(_imageSV.frame), 0, CGRectGetWidth(_imageSV.frame), CGRectGetHeight(_imageSV.frame))];
        imageView.image = photoArr[i];
        [_imageSV addSubview:imageView];
    }
    _imageSV.contentSize = CGSizeMake(photoArr.count * CGRectGetWidth(_imageSV.frame), 0);
}

#pragma mark - WHC_CameraVCDelegate
- (void)WHCCameraVC:(WHC_CameraVC *)cameraVC didSelectedPhoto:(UIImage *)photo{
    [self WHCChoicePictureVC:nil didSelectedPhotoArr:@[photo]];
}