Why images are not showing in UIScrollView? - objective-c

Question

I am using this code to show scrolling images but I am only getting a white screen. I drag drop uiscrollview, created the iboutlet, synthesized it and rest of the code is here
#synthesize scrollView1;
const CGFloat kScrollObjHeight = 199.0;
const CGFloat kScrollObjWidth = 280.0;
const NSUInteger kNumImages = 5;
- (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
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
scrollView1 = [[UIScrollView alloc]init];
bgArray = [NSArray arrayWithObjects:#"Bg", #"Bg1.png", #"Bg2.png", #"Bg3.png", #"Bg4.png", #"Bg5.png", #"Bg6.png", #"Bg7.png", #"Bg8.png", nil];
[scrollView1 setBackgroundColor:[UIColor blackColor]];
[scrollView1 setCanCancelContentTouches:NO];
scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView1.clipsToBounds = YES; // 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 = 0; i < [bgArray count]; i++)
{
NSString *imageName = [NSString stringWithFormat:#"%#", [bgArray objectAtIndex: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 = 199.0;
rect.size.width = 280.0;
imageView.frame = rect;
imageView.tag = i; // tag our images for later use when we place them in serial fashion
[scrollView1 addSubview:imageView];
[scrollView1 setShowsHorizontalScrollIndicator:NO];
[scrollView1 setShowsVerticalScrollIndicator:NO];
}
[self layoutScrollImages];
}

Answer 1

I think if you are create UIScrollView from code
scrollView1 = [[UIScrollView alloc]init];
then please add the scrollView1 in view
Example:-[self.view addSubview:scrollView1];
if you are create UIScrollView from nib then
not use this code
scrollView1 = [[UIScrollView alloc]init];
solve your probem