UILabel行事怪异

Question

我有一个UIPageControl和UIScrollView，你需要刷卡以改变视图为UILabel为标题，UITextView为内容。

对肖像查看，UILabel和UITextView是很好，除了一个小问题。我的UILabel的textAlignment是中心或右，它总是显示在左左手角落的视图。

而现在到风景视图。这是大部分问题发生的地方。

这是个什么样子，

至于代码，

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    pageControl.currentPage = 0; 
    pageControl.numberOfPages = 4; 

    scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin; 
    pageControl.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin; 
} 

- (void)contentSize 
{ 
    for (int i = 0; i < 4; i++) { 
     CGRect textViewFrame = CGRectMake(scrollView.frame.size.width * i, 30.0, 320.0, scrollView.frame.size.height - 30.0); 

     CGRect labelFrame = CGRectMake(scrollView.frame.size.width * i, 0.0, 320.0, 0.0); 

     UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame]; 
     UILabel *label = [[UILabel alloc] initWithFrame:labelFrame]; 

     switch (i) { 
      case 0: 
       label.text = @"Test 1"; 
       textView.text = @"Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum."; 
       break; 

      case 1: 
       label.text = @"Test 2"; 
       textView.text = @"2"; 
       break; 

      case 2: 
       label.text = @"Test 3"; 
       textView.text = @"3"; 
       break; 

      case 3: 
       label.text = @"Test 4"; 
       textView.text = @"4"; 
       break; 

      default: 
       break; 
     } 

     textView.editable = NO; 
     textView.textColor = [UIColor grayColor]; 
     textView.textAlignment = NSTextAlignmentRight; 
     [textView setFont:[UIFont fontWithName:@"Symbol" size:13]]; 

     label.textAlignment = NSTextAlignmentCenter; 
     [label setFont:[UIFont fontWithName:@"AmericanTypewriter" size:20]]; 
     [label sizeToFit]; 

     [scrollView addSubview:label]; 
     [scrollView addSubview:textView]; 
    } 

    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * 4, scrollView.frame.size.height); 
} 

- (void)viewDidLayoutSubviews 
{ 
    [self contentSize]; 
} 

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

Answer 1

首先，使用[label sizeToFit];会降低你的标签的宽度，这就是为什么它总是在左边。如果您不想缩小尺寸并将标签的宽度保持为页面宽度，那么就不要使用它。

您的滚动页面问题发生是因为当您调整滚动视图的大小时滚动的内容不会更改。你需要做的是，当方向改变（可以在(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration）：

• 后新的帧尺寸设置，调整滚动视图的内容大小（页现在有更小的高度和宽度越大）。

• 变化，如果需要你的子视图的框架，以新的方向（即，确定你的页面滚动视图你的新边界和重新分配origin.x）

• ，调整每个页面的内容

• 滚动到页面你目前看：

码（从传呼机组件我有，可能需要适应的东西为您的工作）：

-(void) scrollToCurrentPage { 
    CGRect frameCurrent = scrollview.frame; 
    frameCurrent.origin.x = _currentPageNumber*frameCurrent.size.width; 
    frameCurrent.origin.y = 0; 
    //_currentPage is a reference to the page that was being watched before rotation 
    _currentPage.frame = frameCurrent; 
    [_container scrollRectToVisible: frameCurrent animated: NO]; 
}