Image not Zoom On double tap in iOS - ios

Question

In my application having gallery functionality.For Scrolling image i used REPagedScrollView and i want to image zoom on pinch using 2 finger and also want zoom on double tap but i unable to to zoom image on double tap
please resolved my problem.
I tried by below code :
.h file
#interface ViewPhotoVC : UIViewController<UIScrollViewDelegate,UIGestureRecognizerDelegate>
{
REPagedScrollView *scrollView;
UIScrollView *image_scroll;
int current_page;
BOOL is_FullScreen;
}
#property (strong,nonatomic) IBOutlet UIView *slider_view;
.m file
-(void)video_image_Gallery
{
scrollView = [[REPagedScrollView alloc] initWithFrame:self.slider_view.bounds];
scrollView.delegate=self;
// scrollView.pageControl.pageIndicatorTintColor = [UIColor lightGrayColor];
// scrollView.pageControl.currentPageIndicatorTintColor = [UIColor grayColor];
current_page=0;
for(int i=0;i<[self.PhotoImgArr count];i++){
self.image_view = [[AsyncImageView alloc] initWithFrame:CGRectMake(0,0, self.slider_view.frame.size.width, self.slider_view.frame.size.height)];
// scrollView.frame=CGRectMake(0, 0, screenwidth, screenheight);
image_scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,screenwidth,screenheight)];
self.image_view.backgroundColor=[UIColor clearColor];
self.image_view.contentMode = UIViewContentModeScaleAspectFit;
self.image_view.clipsToBounds = true;
self.image_view.userInteractionEnabled = YES;
self.image_view.autoresizingMask = ( UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin);
self.image_view.image = [UIImage imageNamed:#"no_image1.png"];
self.image_view.imageURL =[NSURL URLWithString:[self.PhotoImgArr objectAtIndex:i]];
self.image_view.backgroundColor = [UIColor colorWithRed:247.0/255.0 green:246.0/255.0 blue:241.0/255.0 alpha:1];
[image_scroll setDelegate:self];
[image_scroll setShowsHorizontalScrollIndicator:NO];
[image_scroll setShowsVerticalScrollIndicator:NO];
[image_scroll setMaximumZoomScale:8.0];
image_scroll.tag=i+1;
self.PlayVideoBtn.tag=i+1;
self.image_view.autoresizingMask=UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
image_scroll.contentSize = CGSizeMake(self.image_view.bounds.size.width-500, self.image_view.bounds.size.height-300);
image_scroll.decelerationRate = UIScrollViewDecelerationRateFast;
// [image_scroll setMinimumZoomScale:[image_scroll frame].size.width / [self.image_view frame].size.width];
[image_scroll setZoomScale:[image_scroll minimumZoomScale]];
[image_scroll addSubview:self.image_view];
[image_scroll addSubview:self.PlayVideoBtn];
[image_scroll addSubview:self.videoImg];
scrollView.tag=0;
// self.PlayVideoBtn.tag=0;
[scrollView addPage:image_scroll];
}
[self.slider_view addSubview:scrollView];
self.index_lbl.text = [NSString stringWithFormat:#"%d of %lu",(int)self.selected_index+1,(unsigned long)[self.PhotoImgArr count]];
[scrollView scrollToPageWithIndex:self.selected_index animated:YES];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView1
{
if(scrollView1.tag ==0){
CGFloat pageWidth = scrollView1.frame.size.width;
current_page = floor((scrollView1.contentOffset.x - pageWidth / 2.0) / pageWidth) + 1;
self.index_lbl.text = [NSString stringWithFormat:#"%d of %lu",current_page+1,(unsigned long)[self.PhotoImgArr count]];
if(current_page+1==self.PhotoImgArr.count)
{
self.nextBtn.userInteractionEnabled=NO;
self.nextImg.image=[UIImage imageNamed:#"disable_next.png"];
}
else if(current_page==0)
{
self.prevBtn.userInteractionEnabled=NO;
self.prevImg.image=[UIImage imageNamed:#"disable_prev.png"];
}
else
{
self.nextBtn.userInteractionEnabled=YES;
self.prevBtn.userInteractionEnabled=YES;
self.nextImg.image=[UIImage imageNamed:#"next.png"];
self.prevImg.image=[UIImage imageNamed:#"prev.png"];
}
}
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView1 {
if([self.PhotoOrVideo isEqualToString:#"Photo"])
{
if([[scrollView1 viewWithTag:scrollView1.tag].subviews count]>0){
return [[scrollView1 viewWithTag:scrollView1.tag].subviews objectAtIndex:0];
}
}
return nil;
}

Answer 1

Please try the below code:
-(void)setScrollView:(UIScrollView *)scrollView
{
_scrollView=scrollView;
_scrollView.minimumZoomScale=0.2;
_scrollView.maximumZoomScale=3.0;
_scrollView.delegate=self;
}
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return self.imageView;
}
-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
{
[self.scrollView flashScrollIndicators];
}