iOS设置富文本行间距、字间距

蔚落 2023-10-17 15:10 152阅读 0赞

[Demo下载地址][Demo]

我们在展示文字信息时，经常会碰到换行自适应高度的文本，这时我们会发现换行之后，文本之间的行间距依然很小，导致看起来很拥挤，影响美观。因此以下代码就是来解决这些问题，新建一个NSString的类别，贴出如下代码：

1、调整行间距，字间距

/*
     *  设置行间距和字间距
     *
     *  @param string    字符串
     *  @param lineSpace 行间距
     *  @param kern      字间距
     *  @param font      字体大小
     *
     *  @return 富文本
     */
    - (NSAttributedString *)getAttributedWithString:(NSString *)string WithLineSpace:(CGFloat)lineSpace kern:(CGFloat)kern font:(UIFont *)font{
        NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
        //调整行间距
        paragraphStyle.lineSpacing = lineSpace;
        NSDictionary *attriDict = @{NSParagraphStyleAttributeName:paragraphStyle,NSKernAttributeName:@(kern),
            NSFontAttributeName:font};
        NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:string attributes:attriDict];
        return attributedString;
    }

2、自适应高度

/* 获取富文本的高度
     *
     * @param string    文字
     * @param lineSpace 行间距
     * @param kern      字间距
     * @param font      字体大小
     * @param width     文本宽度
     *
     * @return size
     */
    - (CGSize)getAttributionHeightWithString:(NSString *)string lineSpace:(CGFloat)lineSpace kern:(CGFloat)kern font:(UIFont *)font width:(CGFloat)width {
        NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
        paragraphStyle.lineSpacing = lineSpace;
        NSDictionary *attriDict = @{
                                NSParagraphStyleAttributeName:paragraphStyle,
                                    NSKernAttributeName:@(kern),
                                    NSFontAttributeName:font};
        CGSize size = [string boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attriDict context:nil].size;
        return size;
    }

![Center][]

[Demo]: https://github.com/RookieForMingge/TextLineSpace
[Center]: https://img-blog.csdn.net/20170817155316952?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvTWluZ2dlUWluZ2NodW4=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center