我需要在我的应用程序中使用UIPagecontrol,但我不确定如何开始。我是一个初学者,苹果给我的例子非常复杂。所有我需要的是他们中的每一个不同的看法3页。
发布于 2009-11-30 02:36:09
您将希望使用UIScrollView,然后将UIPageControl定位在其上。然后将每个页面放入滚动视图,并为其打开分页。这样,每次“轻拍”都会将滚动视图上移一页。
现在,将视图控制器指定为滚动视图的代理,观察scrollViewDidEndScrollAnimation,并使用contentOffset确定哪个页面是当前页面。
发布于 2011-09-14 20:36:48
基于Ben Gottlieb相当出色的正确答案,我得到了我想要的。下面是我用来实现它的代码:
.h
@interface MyViewController : UIViewController <UIScrollViewDelegate> {
}
@property (nonatomic, retain) UIPageControl *helpPageCon;
.m
@synthesize helpPageCon;
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
CGRect frame = [[UIScreen mainScreen] applicationFrame];
float roundedValue = round(scrollView.contentOffset.x / frame.size.width);
self.helpPageCon.currentPage = roundedValue;
}
- (void)viewDidLoad
{
UIScrollView *scrollView = [[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height-50)] autorelease];
scrollView.contentSize = CGSizeMake(frame.size.width*5, frame.size.height-50);
[scrollView setPagingEnabled:YES];
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.delegate = self;
[self.view addSubview:scrollView];
CGRect frame = [[UIScreen mainScreen] applicationFrame];
self.helpPageCon = [[[UIPageControl alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, 50)] autorelease];
self.helpPageCon.center = CGPointMake(frame.size.width/2, frame.size.height-75);
self.helpPageCon.numberOfPages = 5;
[self.view addSubview:self.helpPageCon];
}
- (void)dealloc
{
[super dealloc];
[helpPageCon release];
}
发布于 2012-10-05 13:50:36
只需在水平滚动视图中依次添加3个视图,并在scrollview中启用分页,并在scrollView下方添加一个UIPageControl控件,借助scrollview的委托方法和pageview的Action方法,即可实现UIPageControl的基本工作
我使用contentoffset来查找当前页面
// scrollview delegate
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
CGFloat pageWidth = mainScroll.frame.size.width;
int page = floor((mainScroll.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
pageControl.currentPage=page;
}
// page view action method
- (IBAction)pageControlInteracted:(UIPageControl *)sender {
NSLog(@"%d",sender.currentPage);
CGRect frame = mainScroll.frame;
frame.origin.x = frame.size.width * sender.currentPage;
frame.origin.y = 0;
[mainScroll scrollRectToVisible:frame animated:YES];
}
https://stackoverflow.com/questions/1816144
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