iOS 6 多行标签行距

Question

UILabel 中的行间距有问题，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。所以我将这段代码用于行间距，但应用程序崩溃并给出错误

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'NSAttributedString invalid for autoresizing, it must have a single spanning paragraph style (or none) with a non-wrapping 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];
    }
    else
    {
        NSString * msg = [NSString stringWithFormat:@"%@: %@",chatMessage.from,chatMessage.msgString];
        cell.label2.text = msg;
    }

Answer 1

试试这个

    [cell.label2 setAdjustsFontSizeToFitWidth:NO];

甚至可能只适用于 iOS6

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

• 按照此处所述检测 iOS 6:https://developer.apple.com/library/ios/documentation/userexperience/conceptual/transitionguide/SupportingEarlieriOS.html