PageControl和ScrollView组合

Question

我是一个新的iOS程序员。当我尝试使用分页来编写ScrollView代码时，有一个问题需要修复。我真的不知道我的代码中有什么问题。我已经设置了pageEnable，并将页码设置为4当前为0。在xib.file中，我创建了4个视图，让scrollview连接“代理”到“文件的所有者”。我的引用链接http://www.iosdevnotes.com/2011/03/uiscrollview-paging/当我运行应用程序时，视图不能分页。谢谢你的帮助。下面是我的代码：

/我认为viewDidLoad中的for循环有问题。

导入

@接口ThirdViewController : UIViewController {

IBOutlet UIScrollView *scrollView; 
IBOutlet UIPageControl *pageControl;
IBOutlet UIView *contentOne;
IBOutlet UIView *contentTwo;
IBOutlet UIView *contentThree;
IBOutlet UIView *contentFour;

}

- (IBAction)pageValueChange:(id)sender;

@property(nonatomic,strong) IBOutlet UIScrollView *scrollView;
@property(nonatomic,strong) IBOutlet UIView *contentOne;
@property(nonatomic,strong) IBOutlet UIView *contentTwo;
@property(nonatomic,strong) IBOutlet UIView *contentThree;
@property(nonatomic,strong) IBOutlet UIView *contentFour;
@property(nonatomic,strong) IBOutlet UIPageControl *pageControl;
@property(nonatomic,strong) NSArray *viewArray;

@end




#import "ThirdViewController.h"

@interface ThirdViewController ()<UIScrollViewDelegate>

@end

@implementation ThirdViewController

    @synthesize scrollView,contentOne, contentTwo,contentThree,contentFour,pageControl,viewArray;

    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
             self.title = NSLocalizedString(@"Profile", @"Third");// Custom initialization
        }
        return self;
    }

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        viewArray = [[NSArray alloc]initWithObjects:@"contentOne",@"contentTwo",@"contentThree", @"contentFour",nil];
        for (int i =0; i < [viewArray count]; i++) {
            CGRect frame;
            frame.origin.x = self.scrollView.frame.size.width * i ;
            frame.origin.y = 0;
            frame.size = self.scrollView.frame.size;
            UIView *subview =[[UIView alloc]initWithFrame:frame];

            [self.scrollView addSubview: subview]; //////how to pass the array object to subview
            [subview removeFromSuperview];

        }
        // Do any additional setup after loading the view from its nib.

        scrollView.contentSize = CGSizeMake(scrollView.frame.size.width *[viewArray count], scrollView.frame.size.height);


    }

    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }


    - (IBAction)dismissKeyboard :(id) sender{
       [sender resignFirstResponder];
    }
    - (IBAction)pageValueChange:(id)sender{

        CGRect frame;
        frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
        frame.origin.y = 0;
        frame.size = self.scrollView.frame.size;

    }
    #pragma mark -UIScrollView Delegate
    -(void)scrollViewDidScroll:(UIScrollView *)sender{
        CGFloat pageWidth = self.scrollView.frame.size.width;
        int page = floor((self.scrollView.contentOffset.x-pageWidth/2)/pageWidth)+1;
        self.pageControl.currentPage = page;


}

@end        

Answer 1

您是否在它崩溃的行旁放置了断点？