2013-11-03 39 views
1

我试图使用图像数组实现页面控制和滚动视图,出于某种原因,当滑动到下一页时,图像正在转移。它几乎看起来像图像对于滚动视图来说太大了,但是使它们变小似乎并不奏效。有没有办法让ScrollView不垂直滚动?见下面的代码。图像大小不能与页面控制和滚动视图一起使用?

enter image description here

SSViewController.h

#import <UIKit/UIKit.h> 

@interface SSViewController : UIViewController <UIScrollViewDelegate> 

@property (strong, nonatomic) IBOutlet UIScrollView *scrollView; 
@property (strong, nonatomic) IBOutlet UIPageControl *pageControl; 


@property (nonatomic, strong) NSArray *imageArray; 

SSViewController.m

-(void)viewDidAppear:(BOOL)animated 
{ 

    imageArray = [[NSArray alloc] initWithObjects:@"first.png", @"second.png", nil]; 

for (int i = 0; i < [imageArray count]; i++) { 
    //We'll create an imageView object in every 'page' of our scrollView. 
    CGRect frame; 
    frame.origin.x = self.scrollView.frame.size.width * i; 
    frame.origin.y = 0; 
    frame.size = self.scrollView.frame.size; 

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:frame]; 
    imageView.image = [UIImage imageNamed:[imageArray objectAtIndex:i]]; 
    size:imageView.clipsToBounds = YES; 
    imageView.contentMode = UIViewContentModeScaleAspectFill; 

    [self.scrollView addSubview:imageView]; 
} 
//Set the content size of our scrollview according to the total width of our imageView objects. 
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * [imageArray count], scrollView.frame.size.height); 
} 


    - (void)scrollViewDidScroll:(UIScrollView *)sender 
    { 
     // Update the page when more than 50% of the previous/next page is visible 
     CGFloat pageWidth = self.scrollView.frame.size.width; 
     int page = floor((self.scrollView.contentOffset.x - pageWidth/2)/pageWidth) + 1; 
     self.pageControl.currentPage = page; 
     self.scrollView.contentOffset = CGPointMake(self.scrollView.contentOffset.x, 0); 

    } 

回答

1

我觉得好主意,会改变你的所有allocaton代码(espacially所有代码定义帧)到viewWillAppear方法,因为在viewDidLoad某些帧不会被设置。

+0

将代码移到viewWillAppear(请参阅上面编辑的代码),但我仍然有同样的问题。 –

+1

当你设置图像到你的imageView添加这两行后缩放图像到imageView框架大小:imageView.clipsToBounds = YES; imageView.contentMode = UIViewContentModeScaleAspectFill; – edzio27

+0

添加了这两行(参见上面的代码),没有工作:( –

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