UIPageControl bug: showing one bullet first and then showing everything
- by user313551
I have some strange behavior using a UIPageControl:
First it appears showing only one bullet, then when I move the scroll view all the bullets appear correctly. Is there something I'm missing before I add it as a subview?
Here is my code imageScrollView.h :
@interface ImageScrollView : UIView <UIScrollViewDelegate> {
NSMutableDictionary *photos;
BOOL *pageControlIsChangingPage;
UIPageControl *pageControl;
}
@property (nonatomic, copy) NSMutableDictionary *photos;
@property (nonatomic, copy) UIPageControl *pageControl;
@end
Here is the code for imageScrollView.m:
#import "ImageScrollView.h"
@implementation ImageScrollView
@synthesize photos, pageControl;
- (id)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])) {
// Initialization code
NSLog(@"%@",pageControl);
}
return self;
}
- (void) drawRect:(CGRect)rect
{
[self removeAllSubviews];
UIScrollView *scroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,self.frame.size.width,self.frame.size.height)];
[scroller setDelegate:self];
[scroller setBackgroundColor:[UIColor grayColor]];
[scroller setShowsHorizontalScrollIndicator:NO];
[scroller setPagingEnabled:YES];
NSUInteger nimages = 0;
CGFloat cx= 0;
for (NSDictionary *myDictionaryObject in photos)
{
if (![myDictionaryObject isKindOfClass:[NSNull class]]) {
NSString *photo =[NSString stringWithFormat:@"http://www.techbase.com.mx/blog/%@", [myDictionaryObject objectForKey:@"filepath"]];
NSDictionary *data = [myDictionaryObject objectForKey:@"data"];
UIView *imageContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height - 30)];
TTImageView *imageView = [[TTImageView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height - 30)];
imageView.urlPath=photo;
[imageContainer addSubview:imageView];
UILabel *caption = [[UILabel alloc] initWithFrame:CGRectMake(0,imageView.frame.size.height,imageView.frame.size.width,10)];
[caption setText:[NSString stringWithFormat:@"%@",[data objectForKey:@"description"]]];
[caption setBackgroundColor:[UIColor grayColor]];
[caption setTextColor:[UIColor whiteColor]];
[caption setLineBreakMode:UILineBreakModeWordWrap];
[caption setNumberOfLines:0];
[caption sizeToFit];
[caption setFont:[UIFont fontWithName:@"Georgia" size:10.0]];
[imageContainer addSubview:caption];
CGRect rect = imageContainer.frame;
rect.size.height = imageContainer.size.height;
rect.size.width = imageContainer.size.width;
rect.origin.x = ((scroller.frame.size.width - scroller.size.width) / 2) + cx;
rect.origin.y = ((scroller.frame.size.height - scroller.size.height) / 2);
imageContainer.frame=rect;
[scroller addSubview:imageContainer];
[imageView release];
[imageContainer release];
[caption release];
nimages++;
cx +=scroller.frame.size.width;
}
}
[scroller setContentSize:CGSizeMake(nimages * self.frame.size.width, self.frame.size.height)];
[self addSubview:scroller];
pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(self.frame.size.width/2, self.frame.size.height -20, (self.frame.size.width/nimages)/2, 20)];
pageControl.numberOfPages=nimages;
[self addSubview:pageControl];
[scroller release];
}
-(void)dealloc {
[pageControl release];
[super dealloc];
}
-(void)scrollViewDidScroll:(UIScrollView *)_scrollView{
if(pageControlIsChangingPage){
return;
}
CGFloat pageWidth = _scrollView.frame.size.width;
int page = floor((_scrollView.contentOffset.x - pageWidth /2) / pageWidth) + 1;
pageControl.currentPage = page;
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)_scrollView{
pageControlIsChangingPage = NO;
}
@end
