页面滚动时页面控制器不发生变化

Question

水平滚动可以正常工作，但 UIpagecontroller 不起作用意味着它不会改变，因为我滚动页面。我无法识别错误。请看下面的代码

 #import "ViewController.h"
    @interface ViewController ()
    @property (strong, nonatomic) IBOutlet UIScrollView *scroll;
    @property (strong, nonatomic) IBOutlet UIPageControl *pgcnt;



    @end

    @implementation ViewController

    - (void)viewDidLoad {
        [super viewDidLoad];


        NSArray *arry=[NSArray arrayWithObjects:@"a",@"b",@"c",@"e",@"f", nil];
        for (int i=0; i<arry.count; i++) {
            CGRect frame;
            [self.scroll setPagingEnabled:YES];
            _scroll.pagingEnabled=YES;

            _scroll.bounces = YES;
            [_scroll setShowsHorizontalScrollIndicator:NO];
            [_scroll setShowsVerticalScrollIndicator:NO];

            frame.origin.x=_scroll.frame.size.width*i;


            frame.size=_scroll.frame.size;

            UIView *view=[[UIView alloc]initWithFrame:frame];
            view.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[arry objectAtIndex:i]]];


            [_scroll addSubview:view];

            [self.pgcnt setCurrentPage:i];
           // self.pgcnt.numberOfPages=arry.count;


        }

     _scroll.contentSize=CGSizeMake(_scroll.frame.size.width*arry.count,_scroll.frame.size.height);


        // Do any additional setup after loading the view, typically from a nib.
    }

如有任何建议或帮助，我们将不胜感激

Answer 1

我找到了解决方案，没有人帮助我，但没关系，我会帮助其他人。我没有添加委托方法，这就是为什么 Pagecontrol 点不起作用的原因。但现在工作正常。

pragma 标记 - UIScrollView 委托

- (void)scrollViewDidScroll:(UIScrollView *)sender
{
    // Update the page when more than 50% of the previous/next page is visible
    CGFloat pageWidth = self.scroll.frame.size.width;
    int page = floor((self.scroll.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    self.pgcnt.currentPage = page;
}

谢谢 http://iosmadesimple.blogspot.in/2013/01/page-control-for-switching-between-views.html

页面滚动时页面控制器不发生变化

Page controller not at change when page scroll

iphone

uiscrollview

uipagecontrol

pragma 标记 - UIScrollView 委托