How would I add a dissolve transition to my code? (comic book) - iphone

Question

How would I add a dissolve transition to my code?
I tried looking at Apple's code but to no avail. Any ideas?
#import "ApotheosisViewController.h"
#implementation ApotheosisViewController
#synthesize scrollView1;
- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation {
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}
const CGFloat kScrollObjHeight = 320.0;
const CGFloat kScrollObjWidth = 480.0;
const NSUInteger kNumImages = 40;
- (void)layoutScrollImages
{
UIImageView *view = nil;
NSArray *subviews = [scrollView1 subviews];
// reposition all image subviews in a horizontal serial fashion
CGFloat curXLoc = 0;
for (view in subviews)
{
if ([view isKindOfClass:[UIImageView class]] && view.tag > 0)
{
CGRect frame = view.frame;
frame.origin = CGPointMake(curXLoc, 0);
view.frame = frame;
curXLoc += (kScrollObjWidth);
}
}
// set the content size so it can be scrollable
[scrollView1 setContentSize:CGSizeMake((kNumImages * kScrollObjWidth), [scrollView1 bounds].size.height)];
}
- (void)viewDidLoad
{
self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor];
// 1. setup the scrollview for multiple images and add it to the view controller
//
// note: the following can be done in Interface Builder, but we show this in code for clarity
[scrollView1 setBackgroundColor:[UIColor blackColor]];
[scrollView1 setCanCancelContentTouches:NO];
scrollView1.indicatorStyle = UIScrollViewIndicatorStyleBlack;
scrollView1.clipsToBounds = NO; // default is NO, we want to restrict drawing within our scrollview
scrollView1.scrollEnabled = YES;
// pagingEnabled property default is NO, if set the scroller will stop or snap at each photo
// if you want free-flowing scroll, don't set this property.
scrollView1.pagingEnabled = YES;
// load all the images from our bundle and add them to the scroll view
NSUInteger i;
for (i = 1; i <= kNumImages; i++)
{
NSString *imageName = [NSString stringWithFormat:#"image%d.jpg", i];
UIImage *image = [UIImage imageNamed:imageName];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
// setup each frame to a default height and width, it will be properly placed when we call "updateScrollList"
CGRect rect = imageView.frame;
rect.size.height = kScrollObjHeight;
rect.size.width = kScrollObjWidth;
imageView.frame = rect;
imageView.tag = i; // tag our images for later use when we place them in serial fashion
[scrollView1 addSubview:imageView];
[imageView release];
}
[self layoutScrollImages]; // now place the photos in serial layout within the scrollview
}
- (void)dealloc
{
[scrollView1 release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// invoke super's implementation to do the Right Thing, but also release the input controller since we can do that
// In practice this is unlikely to be used in this application, and it would be of little benefit,
// but the principle is the important thing.
//
[super didReceiveMemoryWarning];
}
#end

Answer 1

I can't immediately tell what the code you posted has to do with a dissolve transition.
If you are trying to go from one view to another, then you could put this in your code:
In
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
for one viewController:
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
and when switching from one view to the other:
[self presentModalViewController:otherViewController animated:YES];