如何在UIScrollView iOS中旋转imageview？

Question

我有UIScrollView，其中有UIImageView。我需要能够旋转图像。 ScrollView正在拦截旋转手势。

    self.scrollView = [[ScrollView alloc] initWithFrame:self.bounds];
    self.scrollView.showsHorizontalScrollIndicator = NO;
    self.scrollView.showsVerticalScrollIndicator = NO;
    self.scrollView.delegate = self;
    self.scrollView.clipsToBounds = YES;
    self.scrollView.decelerationRate = 0.0; 
    self.scrollView.backgroundColor = [UIColor clearColor];
    self.scrollView.layer.borderWidth = 2.0;
    self.scrollView.layer.borderColor = [[UIColor whiteColor] CGColor];


    [self addSubview:self.scrollView];

    //self.imageView = [[UIImageView alloc] initWithFrame:self.scrollView.frame];
    self.imageView = [[UIRotateImageView alloc] initWithFrame:frame];
    self.imageView.contentMode = UIViewContentModeScaleAspectFit;
    self.imageView.backgroundColor = [UIColor blackColor];
    [self.scrollView addSubview:self.imageView];

    self.scrollView.minimumZoomScale = CGRectGetWidth(self.scrollView.frame) / CGRectGetWidth(self.imageView.frame);
    self.scrollView.minimumZoomScale = 1.0;
    self.scrollView.maximumZoomScale = 20.0;
    [self.scrollView setZoomScale:self.scrollView.minimumZoomScale];


- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
    return self.imageView;
}