Question

我有一个textview，它以html格式从服务器加载一些文本。但即使我在文本视图中设置它，文本的字体大小也不会改变，这可能是因为我正在根据服务器的文本内容计算textview高度。

以下是代码

    itemDescribtionView = [[[UIView alloc]init] autorelease];
    [itemDescribtionView setBackgroundColor:[UIColor whiteColor]];
    [mainPageScrollView addSubview:itemDescribtionView];

    NSString * itemDescribtionStr = [NSString stringWithFormat:@"%@",[[delegate.detailPageArray objectAtIndex:delegate.detailArraySelectedIndex]objectForKey:@"item_description"]];


    NSAttributedString *attributedString = [[NSAttributedString alloc]
                                            initWithData: [itemDescribtionStr dataUsingEncoding:NSUnicodeStringEncoding]
                                            options: @{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType }
                                            documentAttributes: nil
                                            error: nil];

    UITextView * itemDescriptionTextView = [[[UITextView alloc]init]autorelease];
    [itemDescriptionTextView setDataDetectorTypes:UIDataDetectorTypeLink];
    [itemDescriptionTextView setDelegate:self];
    [itemDescriptionTextView setFont:[UIFont fontWithName:appFontRegular size:18]];
    [itemDescriptionTextView setUserInteractionEnabled:YES];
    [itemDescriptionTextView setScrollEnabled:NO];
    [itemDescriptionTextView setEditable:NO];
    [itemDescriptionTextView setAttributedText:attributedString];
    [itemDescriptionTextView setFrame:CGRectMake(10,0,delegate.windowWidth-20,[self heightForAttributedString:attributedString maxWidth:delegate.windowWidth-20])];
    itemDescriptionTextView.contentInset = UIEdgeInsetsMake(-7.0,0.0,0,0.0);
    [itemDescribtionView addSubview:itemDescriptionTextView];

- (CGFloat)heightForAttributedString:(NSAttributedString *)text maxWidth:(CGFloat)maxWidth {

NSStringDrawingOptions options = NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
CGSize size = [text boundingRectWithSize:CGSizeMake(maxWidth, CGFLOAT_MAX) options:options  context:nil].size;
NSLog(@"newtext %@",newtext);
NSLog(@"text %@",text);
CGFloat height = size.height + 1; // add 1 point as padding

NSLog(@"%f",height);
if(height<30)
{
    height = 30;
}
return height;
 }

我尝试在itemDescriptionTextView中的setFrame之后设置setFont并确实改变了字体大小，但是textview的高度不足以显示所有文本。

所以我试图在计算textview的高度之前更改字体。但到目前为止我没有运气。并且想看看是否有人可以指导我通过。谢谢。

Answer 1

请在创建itemDescriptionTextView之前在此属性字符串上设置字体。

[attributedString addAttributes:@{NSFontAttributeName: [UIFont fontWithName:appFontRegular size:18]} range:NSMakeRange(0, attributedString.length)];

更改NSString的字体大小并加载到文本视图中

1 个答案: