iOS 5/6 与 iOS 7 多行标签行间距

Question

我在 iOS 7 下运行我的应用程序，发现多行标签(无属性、纯文本)以较小的行距呈现。有人知道如何处理 iOS 5 兼容性吗？

iOS 5/6

iOS 7

Answer 1

if(NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1)
{
    NSFont *font = /* set font */;

    NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragraphStyle setLineSpacing: /* required line spacing */];

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

    [label setAttributedText: attributedString];
}
else
{
    /* old method */
}