Iphone UIPageControl——视图';点的点击不会改变
我正在应用程序中使用pageControl。当我点击视图时,点击点上的视图并没有改变,而是在页面控制的两端。我希望他们在点击点时改变。怎么办?有什么我需要实现的方法吗 这是密码Iphone UIPageControl——视图';点的点击不会改变,iphone,cocoa-touch,ios,uiscrollview,Iphone,Cocoa Touch,Ios,Uiscrollview,我正在应用程序中使用pageControl。当我点击视图时,点击点上的视图并没有改变,而是在页面控制的两端。我希望他们在点击点时改变。怎么办?有什么我需要实现的方法吗 这是密码 #import "ScrollingViewController.h" @implementation ScrollingViewController @synthesize scrollView; @synthesize pageControl; - (void)viewDidLoad { [super
#import "ScrollingViewController.h"
@implementation ScrollingViewController
@synthesize scrollView;
@synthesize pageControl;
- (void)viewDidLoad
{
[super viewDidLoad];
[self setupPage];
pageControl =[[UIPageControl alloc] initWithFrame:CGRectMake(0,390,320,100)];
pageControl.userInteractionEnabled =YES;
pageControl.numberOfPages = 5;
pageControl.currentPage = 0;
[self.pageControl setBackgroundColor:[UIColor blackColor]];
pageControl.enabled = TRUE;
[pageControl setHighlighted:YES];
[pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:pageControl];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload
{
[scrollView release];
[pageControl release];
}
- (void)dealloc
{
[super dealloc];
}
- (void)setupPage
{
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,320,400)];
[scrollView setContentSize:CGSizeMake(1000, 800)];
//scrollView.contentSize = CGSizeMake(1000,800);
scrollView.scrollsToTop = NO;
[self.scrollView setBackgroundColor:[UIColor blackColor]];
[scrollView setCanCancelContentTouches:NO];
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView.clipsToBounds = YES;
scrollView.scrollEnabled = YES;
scrollView.pagingEnabled = YES;
NSUInteger nimages = 0;
CGFloat cx = 0;
for (; ; nimages++)
{
NSString *imageName = [NSString stringWithFormat:@"image%d.jpg", (nimages + 1)];
UIImage *image = [UIImage imageNamed:imageName];
if (image == nil)
{
break;
}
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CGRect rect = imageView.frame;
rect.size.height = image.size.height;
rect.size.width = image.size.width;
rect.origin.x = ((scrollView.frame.size.width - image.size.width) / 2) + cx;
rect.origin.y = ((scrollView.frame.size.height - image.size.height) / 2);
imageView.frame = rect;
[scrollView addSubview:imageView];
[imageView release];
cx += scrollView.frame.size.width;
}
self.pageControl.numberOfPages = nimages;
[scrollView setContentSize:CGSizeMake(cx, [scrollView bounds].size.height)];
scrollView.delegate = self;
[self.view addSubview:scrollView];
}
- (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;
}
- (IBAction)changePage:(id)sender
{
/*
* Change the scroll view
*/
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * pageControl.currentPage;
frame.origin.y = 0;
[scrollView scrollRectToVisible:frame animated:YES];
pageControlIsChangingPage = YES;
}
@end
尽可能增加页面控件的宽度。即使您将页面控件的宽度保持得足够短,使其能够容纳尽可能多的点,它也可以显示这些点。但无法接收操作。在ScrollView.m中使用
#pragma标记-
#pragma标记loadGalleryView
-(无效)loadGalleryView{
galleryArr=[memberDic objectForKey:@“arrKey”];
如果([galleryArr计数]%5!=0)
{
noOfPages=([galleryArr count]/5)+1;
}
其他的
{
noOfPages=[galleryArr计数]/5;
}
ViewController=[[NSMutableArray alloc]init];
for(int i=0;i=noofpage)
{
返回;
}
GalleryViewController*givc=[ViewController对象索引:第页];
如果((NSNull*)givc==[NSNull])
{
givc=[[GalleryViewController alloc]initWithPageNumber:page];
givc.imageArr=[galleryArr-retain];
[viewControllers replaceObjectAtIndex:page with Object:givc];
[givc发布];
}
if(nil==givc.view.superview)
{
CGRect frame=self.view.frame;
frame.origin.x=frame.size.width*页;
frame.origin.y=0.0f;
givc.view.frame=框架;
[galleryScrollView添加子视图:givc.view];
}
}
-(无效)scrollViewDidScroll:(UIScrollView*)发送方{
//我们不希望UIPageControl和中的滚动委托之间出现“反馈循环”
//由用户点击页面控件生成的滚动事件触发的更新
//委托方法。当使用页控件时,我们使用布尔值禁用委托逻辑。
//当上一页/下一页显示超过50%时,切换指示器
CGFloat pageWidth=galleryScrollView.frame.size.width;
intpage=floor((galleryScrollView.contentOffset.x-pageWidth/2)/pageWidth)+1;
pageControl.currentPage=页面;
//加载可见页面及其两侧的页面(以避免用户开始滚动时闪烁)
[带页面的自加载滚动视图:第1页];
[带页面的自加载滚动视图:第页];
[self-loadScrollViewWithPage:page+1];
//一种可能的优化方法是卸载不再可见的视图+控制器
}
//在滚动动画结束时,重置滚动源自UIPageControl时使用的布尔值
-(无效)ScrollViewDiEndDecelling:(UIScrollView*)scrollView{
isPageControlUsed=否;
}
在GalleryView.m中使用
-(void)viewDidLoad{
[超级视图下载];
浮动x=7.0f;
对于(int i=(页码*5);i请告诉我们一些代码页面控件的宽度足够大。虽然它不工作?如果在xib中页面控件的宽度显示2个点,并且在程序中将其页数设置为10,则会出现此问题。在显示x个点的应用程序中,页面控件的宽度应与页面控件的宽度相同控制xib文件中显示x个点的数量。我更改了宽度但没有工作。我在上面显示了我的代码,你能帮我吗?我只使用页面控制尝试了你的代码。我将页数设置为7。当我单击点2和点3时,它没有响应。我单击点4,它响应并继续单击,直到我到达最后一个点I现在当我点击点2和点3时,它会有反应!!相反的情况也是如此。它显示点2和点3确实有反应。但在某些情况下它们没有反应。在我看来,好像是苹果给了我们这个。
#pragma mark -
#pragma mark loadGalleryView
-(void) loadGalleryView{
galleryArr = [memberDic objectForKey:@"arrKey"];
if ([galleryArr count]%5 != 0)
{
noOfPages = ([galleryArr count]/5)+1;
}
else
{
noOfPages = [galleryArr count]/5;
}
viewControllers = [[NSMutableArray alloc] init];
for (int i=0; i<noOfPages; i++)
{
[viewControllers addObject:[NSNull null]];
}
[galleryScrollView setPagingEnabled:TRUE];
[galleryScrollView setContentSize:CGSizeMake(self.view.frame.size.width* noOfPages,69.0f)];
[galleryScrollView setShowsHorizontalScrollIndicator:FALSE];
[galleryScrollView setShowsVerticalScrollIndicator:FALSE];
[galleryScrollView setScrollsToTop:FALSE];
[galleryScrollView setDelegate:self];
[pageControl setNumberOfPages:noOfPages];
[pageControl setCurrentPage:0];
[self loadScrollViewWithPage:0];
[self loadScrollViewWithPage:1];
}
//-----------------Load scroll View----------------------------------
-(void) loadScrollViewWithPage:(int) page{
if (page < 0)
{
return;
}
if (page >= noOfPages)
{
return;
}
GalleryViewController *givc = [viewControllers objectAtIndex:page];
if ((NSNull *)givc == [NSNull null])
{
givc = [[GalleryViewController alloc] initWithPageNumber:page];
givc.imageArr = [galleryArr retain];
[viewControllers replaceObjectAtIndex:page withObject:givc];
[givc release];
}
if (nil == givc.view.superview)
{
CGRect frame = self.view.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0.0f;
givc.view.frame = frame;
[galleryScrollView addSubview:givc.view];
}
}
- (void)scrollViewDidScroll:(UIScrollView *)sender {
// We don't want a "feedback loop" between the UIPageControl and the scroll delegate in
// which a scroll event generated from the user hitting the page control triggers updates from
// the delegate method. We use a boolean to disable the delegate logic when the page control is used.
// Switch the indicator when more than 50% of the previous/next page is visible
CGFloat pageWidth = galleryScrollView.frame.size.width;
int page = floor((galleryScrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
pageControl.currentPage = page;
// load the visible page and the page on either side of it (to avoid flashes when the user starts scrolling)
[self loadScrollViewWithPage:page - 1];
[self loadScrollViewWithPage:page];
[self loadScrollViewWithPage:page + 1];
// A possible optimization would be to unload the views+controllers which are no longer visible
}
// At the end of scroll animation, reset the boolean used when scrolls originate from the UIPageControl
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
isPageControlUsed = NO;
}
- (void)viewDidLoad {
[super viewDidLoad];
float x = 7.0f;
for (int i = (pageNumber*5); i<(pageNumber+1)*5; i++)
{
if (i<[imageArr count])
{
NSString *url = [imageArr objectAtIndex:i];
MyImageView *imgView = [[MyImageView alloc] initWithFrame:CGRectMake(x, 7.5f, 55.0f, 55.0f)];
[imgView addImageFrom:url];
[self.view addSubview:imgView];
[imgView release];
x = x+62.5f;
}
}
}
-(id)initWithPageNumber:(int) page{
if (self = [super initWithNibName:@"GalleryViewController" bundle:nil])
{
pageNumber = page;
}
return self;
}