Advertise here




Advertise here

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Sign In with Google Sign In with OpenID
Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.

Problem with UIView, UIViewController and IB

Hello Everyone,

Okay so I am trying to create a grid of 6 UIImageViews which scrolls vertically (and can show up to 15). The way I am doing it is reusing the same 6 UIImageViews. Before fixing the actual scrolling, I want to be able to at least see the images on the view - they are not showing up.

So here's what I did. I subclass-ed UIView as follows (its still called ScrollingViewController becuase it was a ViewController before I changed it to become a UIView. I should rename it to ScrollingView)


@implementation ScrollingViewController

@synthesize scrollView, imageSet, imageView1, imageView2, imageView3, imageView4, imageView5, imageView6, image1Index, image2Index, image3Index, image4Index, image5Index, image6Index;

- (void)setImages:(NSArray *)images {

imageView1.frame = CGRectMake(683, 0, 341, 352);
imageView2.frame = CGRectMake(342, 0, 341, 352);
imageView3.frame = CGRectMake(0, 0, 341, 352);
imageView4.frame = CGRectMake(683, 352, 341, 352);
imageView5.frame = CGRectMake(342, 352, 341, 352);
imageView6.frame = CGRectMake(0, 352, 341, 352);

imageView1 = [imageSet objectAtIndex:0];
imageView2 = [imageSet objectAtIndex:1];
imageView3 = [imageSet objectAtIndex:2];
imageView4 = [imageSet objectAtIndex:3];
imageView5 = [imageSet objectAtIndex:4];
imageView6 = [imageSet objectAtIndex:5];

scrollView.contentSize = CGSizeMake([imageSet count] * 341, 352);
}

- (id) init {
self = [super init];
if(self != nil) {
scrollView = [[UIScrollView alloc] init];
scrollView.scrollEnabled = YES;
scrollView.pagingEnabled = NO;
scrollView.directionalLockEnabled = YES;
scrollView.showsVerticalScrollIndicator = YES;
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.delegate = self;
//scrollView.backgroundColor = [UIColor blueColor];
scrollView.autoresizesSubviews = YES;
scrollView.frame = CGRectMake(0, 0, 1024, 704);
//[self.view addSubview:scrollView];

imageView1 = [[UIImageView alloc] init];
[scrollView addSubview:imageView1];

imageView2 = [[UIImageView alloc] init];
[scrollView addSubview:imageView2];

imageView3 = [[UIImageView alloc] init];
[scrollView addSubview:imageView3];

imageView4 = [[UIImageView alloc] init];
[scrollView addSubview:imageView4];

imageView5 = [[UIImageView alloc] init];
[scrollView addSubview:imageView5];

imageView6 = [[UIImageView alloc] init];
[scrollView addSubview:imageView6];
}

return self;
}

#pragma mark - UIScrollView Delegate Method
- (void) scrollViewDidScroll:(UIScrollView *) thisScrollView {

self.scrollView.contentOffset = CGPointMake(1024, thisScrollView.contentOffset.y);

/**** Fix Scrolling here after it actually appears on the View
CGFLoat pageHeight = 1024;
float currPos = scrollView.contentOffset.y;
int selectedPage = roundf(currPos / pageHeight);
float truePosition = selectedPage * pageHeight;

if (currPos > 1024) {

}


///////////////////////////////////


CGFloat pageWidth = 1024;
float currPos = scrollView.contentOffset.x;

int selectedPage = roundf(currPos / pageWidth);

float truePosition = selectedPage * pageWidth;

int zone = selectedPage % 2;

BOOL view1Active = zone == 0;

UIImageView *nextView = view1Active ? view2 : view1;

int nextpage = truePosition > currPos ? selectedPage-1 : selectedPage+1;

if(nextpage >= 0 && nextpage < [imageSet count]) {
if((view1Active && nextpage == view1Index) || (!view1Active && nextpage == view2Index)) return;

NSLog(@\"Load next image!\");

nextView.frame = CGRectMake(nextpage*1024, 0, 1024, 704);
nextView.image = [imageSet objectAtIndex:nextpage];

if(view1Active) view1Index = nextpage;
else view2Index = nextpage;
}*/
}

- (void)dealloc {
[scrollView release];
[imageSet release];
[imageView1 release];
[imageView2 release];
[imageView3 release];
[imageView4 release];
[imageView5 release];
[imageView6 release];
[super dealloc];
}

@end


And then I have ViewController as follows (which gets pushed on top of the UINavigationController stack from another ViewController:


@implementation TopNewsViewController

@synthesize scrollingViewController;

- (id)init {

self = [super init];

if(self != nil) {
/*scrollingViewController = [[ScrollingViewController alloc] init];
scrollingViewController.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
scrollingViewController.view.autoresizesSubviews = YES;
[self.view addSubview:scrollingViewController.view];*/
[self.view addSubview:scrollingViewController];
}

return self;
}

- (void) viewDidLoad {
// Load an array of images into the page view controller
[scrollingViewController setImages:[NSArray arrayWithObjects:
[UIImage imageNamed:@\"1.jpg\"],
[UIImage imageNamed:@\"2.jpg\"],
[UIImage imageNamed:@\"3.jpg\"],
[UIImage imageNamed:@\"4.jpg\"],
[UIImage imageNamed:@\"5.jpg\"],
[UIImage imageNamed:@\"6.jpg\"],
[UIImage imageNamed:@\"7.jpg\"],
[UIImage imageNamed:@\"8.jpg\"],
[UIImage imageNamed:@\"9.jpg\"],
[UIImage imageNamed:@\"1.jpg\"],
[UIImage imageNamed:@\"2.jpg\"],
[UIImage imageNamed:@\"3.jpg\"],
[UIImage imageNamed:@\"4.jpg\"],
[UIImage imageNamed:@\"5.jpg\"],
[UIImage imageNamed:@\"6.jpg\"],
nil]];
}

#pragma mark - View Lifecycle / Memory Management
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}

- (void)viewDidUnload {
[super viewDidUnload];
self.scrollingViewController = nil;
}

- (void)dealloc {
[scrollingViewController release];
[super dealloc];
}

@end



How do I make this UIView appear in IB? In IB for TopViewController.xib, I created a View and connected it to the File's Owner and then created another View in it, and changed it to be a ScrollingViewController and connected it to the ScrollingViewController outlet in IB.
Here's how my IB is structured:
> View (UIView)
- ScrollingViewController (UIView)


Now when I run the app, the view that shows up is still white. When I add a Label in IB, it shows up when I run the app which means that my UIView drawings aren't showing up. Why is that? Can someone help me?

Any help is much appreciated.

Thank you,
Post edited by Nayefc on

Replies

Sign In or Register to comment.