段落行间距字间距

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(1.1)}];

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    [paragraphStylesetLineSpacing:3];

    [attributedStringaddAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];

    titleLab.attributedText= attributedString;

    [topBGaddSubview:titleLab];