Zooming problem in UIScrollView - iphone

Question

I am using UIScrollView.In that scrollview I placing UIImageViews in serial order.Zooming is not working .This is my code
- (void)viewDidLoad
{
self.view.backgroundColor=[UIColor blackColor];
NSArray *imageArray=[[NSArray alloc]initWithObjects:[UIImage imageNamed:#"test1.png"],[UIImage imageNamed:#"test2.png"],[UIImage imageNamed:#"test3.png"], nil];
scrollView_=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width+20, self.view.frame.size.height)];
[scrollView_ setCanCancelContentTouches:NO];
scrollView_.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView_.clipsToBounds = NO;
scrollView_.scrollEnabled = YES;
scrollView_.pagingEnabled = YES;
scrollView_.delegate=self;
scrollView_.showsHorizontalScrollIndicator=NO;
scrollView_.showsVerticalScrollIndicator=NO;
scrollView_.contentSize = CGSizeMake([imageArray count]*self.scrollView_.frame.size.width, self.scrollView_.frame.size.height);
[scrollView_ setMaximumZoomScale:3.0];
[scrollView_ setMinimumZoomScale:1];
[scrollView_ setZoomScale:1];
[scrollView_ setBouncesZoom:YES];
[scrollView_ setBounces:YES];
for(int i=0;i<[imageArray count];i++)
{
UIImageView *imageView=[[UIImageView alloc]initWithImage:[imageArray objectAtIndex:i]];
imageView.frame=CGRectMake((i*320)+(i*20), 0, 320, 480);
[imageView_ setTag:i];
[scrollView_ addSubview:imageView];
[imageView release];
}
[self.view addSubview:scrollView_];
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return [scrollView_ viewWithTag:page_];
}
- (void)scrollViewDidScroll:(UIScrollView *)_scrollView
{
CGFloat pageWidth = _scrollView.frame.size.width;
int page = floor((_scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
self.page_=page;
}
Thanks in advance..

Answer 1

Where have you set -
[self.mainScroll setZoomScale:(float)];
I guess by default this is 1. So no zoom happens...

Answer 2

Create a container view, and add imageViews into the container view,
then use the container view as zoomview.
- viewDidLoad {
// ---
self.containerView =[[[UIView alloc] init] autorelease];
self.containerView.frame = CGRectMake(0, 0, [imageArray count]*self.scrollView_.frame.size.width, self.scrollView_.frame.size.height);
[scrollView_ addSubView:self.containerView];
for(int i=0;i<[imageArray count];i++)
{
UIImageView *imageView=[[UIImageView alloc]initWithImage:[imageArray objectAtIndex:i]];
imageView.frame=CGRectMake((i*320)+(i*20), 0, 320, 480);
[imageView_ setTag:i];
[self.containerView addSubview:imageView];
[imageView release];
}
// --
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return self.containerView;
}