iOS 6 多行标签行距 | 多行标签行距

本文介绍了iOS 6 多行标签行距的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

UILabel 中的行距有问题，我使用的是自定义字体，当我使用表情符号时，两行之间没有空格.这显然看起来不太好.所以我使用此代码来设置行间距，但应用程序崩溃并给出错误

由于未捕获的异常NSInternalInconsistencyException"而终止应用程序，原因:NSAttributedString 对自动调整无效，它必须具有单跨段落样式(或无)和非换行 lineBreakMode."

if ([cell.label2 RespondsToSelector:@selector(setAttributedText:)]){UIFont *font =btMyriadProRegularWithSize14Pt;NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];[paragraphStyle setLineSpacing: 22];NSDictionary *attributes = @{ NSFontAttributeName: font, NSParagraphStyleAttributeName:paragraphStyle };NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:chatMessage.msgString attributes:attributes];[cell.label2 setAttributedText:attributedString];}别的{NSString * msg = [NSString stringWithFormat:@"%@: %@",chatMessage.from,chatMessage.msgString];cell.label2.text = msg;}

解决方案

试试这个

 [cell.label2 setAdjustsFontSizeToFitWidth:NO];

甚至可能只适用于 iOS6

if (floor(NSFoundationVersionNumber)

按照此处的描述检测 iOS 6:https://developer.apple.com/library/ios/documentation/userexperience/conceptual/transitionguide/SupportingEarlieriOS.html

There is a problem with line spacing in UILabel, I am using custom font and when I use smilies there is no space between two lines. which obviously looks not so good. So I used this code for line spacing but app crashes giving the error

if ([cell.label2 respondsToSelector:@selector(setAttributedText:)])
    {
        UIFont *font =btMyriadProRegularWithSize14Pt;

        NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
        [paragraphStyle setLineSpacing: 22];

        NSDictionary *attributes = @{ NSFontAttributeName: font, NSParagraphStyleAttributeName: paragraphStyle };
        NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:chatMessage.msgString attributes:attributes];

        [cell.label2 setAttributedText: attributedString];
    }
    else
    {
        NSString * msg = [NSString stringWithFormat:@"%@: %@",chatMessage.from,chatMessage.msgString];
        cell.label2.text = msg;
    }

解决方案

try this

    [cell.label2 setAdjustsFontSizeToFitWidth:NO];

maybe even only for iOS6

if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) { //*
       [cell.label2 setAdjustsFontSizeToFitWidth:NO];
}

detect iOS 6 as decribed here: https://developer.apple.com/library/ios/documentation/userexperience/conceptual/transitionguide/SupportingEarlieriOS.html

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