how would i add dissolve transition to my code? (comic book)

Question

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];