UIPageControl is not Displayed

Question

I use the following to display scrollview and pagecontrol

scrollView=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 179)];
    pageControl=[[UIPageControl alloc] initWithFrame:CGRectMake(0, 179, 320, 20)];

    scrollView.delegate = self;
    [scrollView setBackgroundColor:[UIColor blackColor]];
    [scrollView setCanCancelContentTouches:NO];
    scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
    scrollView.clipsToBounds = YES;
    scrollView.scrollEnabled = YES;
    scrollView.pagingEnabled = YES;

    int index=[[self._parameters objectForKey:@"index"] intValue];
    NSString *imageNamePrefix=[[activeAppIdList objectAtIndex:index] objectForKey:@"AppID"];
    int noOfScreenShot=[[[activeAppIdList objectAtIndex:index] objectForKey:@"NoOfScreenShot"] intValue];

    CGFloat cx = 0;
    for (int j=1;j<=noOfScreenShot ; j++) {
        UIImage *image =[[UIImage alloc] init];
        image= [self loadImage:[[NSString alloc]initWithFormat:@"%@_%d.jpg",imageNamePrefix,j]];

           if (image == nil) {

            NSString *urlString = [[NSString alloc]initWithFormat:@"http://localhost/MoreApp/images/%@_%d.jpg",imageNamePrefix,j];

               NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
            UIImage *temp=[[UIImage alloc]initWithData:imageData] ;

            [self saveImage:temp withName:[[NSString alloc]initWithFormat:@"%@_%d.jpg",imageNamePrefix,j]];

            image = temp;
            [temp release];
            [urlString release];
        }

        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
        [image release];
        imageView.frame = CGRectMake(cx,0,scrollView.frame.size.width,scrollView.frame.size.height);
                [scrollView addSubview:imageView];
        [imageView release];

        cx += scrollView.frame.size.width;


    }

    NSLog(@"No Of pages..%d",noOfScreenShot);
    pageControl.numberOfPages = noOfScreenShot;
    pageControl.currentPage = 0;
        scrollView.contentSize = CGSizeMake(cx,scrollView.frame.size.height);

    NSLog(@"Width:%f",scrollView.frame.size.width);

    [ refToSelf.instructionView addSubview:scrollView];
    [ refToSelf.instructionView addSubview:pageControl];


    [scrollView release];
    [pageControl release];

scrollview is ok but pagecontroll didn't showed... can help??

If you solved your question, post the solution for it and mark as answered. — Tsimmi, Oct 04 '10 at 15:39

score 30 · Accepted Answer · answered Nov 22 '10 at 13:00

30

If the page control's and container's background color is the same (by default white) page control won't be visible.

answered Nov 22 '10 at 13:00

srgtuszy

1,548
1
18
16

1

yes...it was a mistake.....both the background and page control have same color....so it was not visible... – Rony Nov 23 '10 at 09:29

score 14 · Answer 2 · answered May 27 '14 at 18:03

14

For anyone who finds this, another silly mistake you can make is to not set the numberOfPages attribute on the UIPageControl, which will also cause it to not display.

answered May 27 '14 at 18:03

apb

3,270
3
29
23

score 2 · Answer 3 · answered Feb 25 '14 at 13:40

2

My mistake was equally annoying - developing with storyboard in 3.5 inch view, and built on 4 inch device on simulator so it was offscreen. Silly!

answered Feb 25 '14 at 13:40

Joel Balmer

1,428
2
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21

UIPageControl is not Displayed

3 Answers3

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