IOS: add some sub-scrollview in a scrollview, image don't appear - ios

Question

I have this code:
- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *image = [NSArray arrayWithObjects:[UIImage imageNamed:#"1.png"], [UIImage imageNamed:#"2.png"], [UIImage imageNamed:#"3.png"], nil];
for (int i = 0; i < image.count; i++) {
CGRect frame;
frame.origin.x = scrollV.frame.size.width * i;
frame.origin.y = 0;
frame.size = scrollV.frame.size;
UIScrollView *subScrollView = [[UIScrollView alloc] initWithFrame:frame];
UIImageView *subview = [[UIImageView alloc] initWithFrame:frame];
[subview setImage:[image objectAtIndex:i]];
[subScrollView addSubview:subview];
[scrollV addSubview:subScrollView];
[subview release];
[subScrollView release];
}
scrollV.contentSize = CGSizeMake(scrollV.frame.size.width * image.count, scrollV.frame.size.height);
}
scrollV is the main scrollview and it have "paging enabled"
if I use this code I have my scrollV with paging enabled but I see inside it only "1.png" at first page, I don't see others png, why?

Answer 1

You're settings the frame of subview to the incorrect value. That is making it the same frame as its subScrollView so it's pushing it off to the right. Try this:
- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *image = [NSArray arrayWithObjects:[UIImage imageNamed:#"1.png"], [UIImage imageNamed:#"2.png"], [UIImage imageNamed:#"3.png"], nil];
for (int i = 0; i < image.count; i++) {
CGRect frame;
frame.origin.x = scrollV.frame.size.width * i;
frame.origin.y = 0;
frame.size = scrollV.frame.size;
UIScrollView *subScrollView = [[UIScrollView alloc] initWithFrame:frame];
UIImageView *subview = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, frame.size.width, frame.size.height)];
UIImage *image = [image objectAtIndex:i];
subScrollView.contentSize = image.size;
[subview setImage:image];
[subScrollView addSubview:subview];
[scrollV addSubview:subScrollView];
[subview release];
[subScrollView release];
}
scrollV.contentSize = CGSizeMake(scrollV.frame.size.width * image.count, scrollV.frame.size.height);
}
Edit: Also probably best to set the content size of the inner scrollview. I added code to that effect above.