UILabel增加行间距

    CGFloat width = self.view.bounds.size.width;
    NSDictionary *attr = @{NSFontAttributeName:[UIFont systemFontOfSize:17]};
    NSMutableAttributedString *mAttrStr = [[NSMutableAttributedString alloc] initWithString:@"我是有行间距的啊!\n我是有行间距的啊!"];
    NSMutableAttributedString *testAttrStr = [[NSMutableAttributedString alloc] initWithString:@"测试"];
    [testAttrStr addAttributes:attr range:NSMakeRange(0, testAttrStr.length)];
    CGFloat oneHeight = [testAttrStr boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil].size.height;
    CGFloat rowHeight = [mAttrStr boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil].size.height;
    // 如果超出一行，则offset=0;
    if(rowHeight > oneHeight){
        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
        paragraphStyle.lineSpacing = 10;
        [mAttrStr addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, mAttrStr.length)];
    }
    self.label.attributedText = [mAttrStr copy];

可以看一下我写的分类WQJTool
支持pod导入项目