iOS 学习 - 5.UILabel设置行距

NSMutableAttributedString *arrString  =[[NSMutableAttributedString alloc]initWithString:@"asdassadklsjsdjaskljdklsajdlsajldjsla;jdl;sajdjlas;dsak"];
    NSMutableParagraphStyle *para = [[NSMutableParagraphStyle alloc]init];
    //行距
    [para setLineSpacing:];
    //第一个属性 - 段落格式
    [arrString addAttribute:NSParagraphStyleAttributeName value:para range:NSMakeRange(, [arrString length])];
    [self.label setAttributedText:arrString];
    [self.label sizeToFit];
    [self.view addSubview:self.label];