iOS开发UITextView富文本设置行距，颜色及插入图片

1.设置行距和根据range设置颜色

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = kGetP(9);// 字体的行间距
NSString *str1 = self.describeLab.text;
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:self.describeLab.text];
[str addAttribute:NSForegroundColorAttributeName value:kDescribeLabelColor range:NSMakeRange(0,4)];
[str addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [str1   length])];
self.describeLab.attributedText = str;

2.插入图片附件

 NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = img;//[UIImage imageNamed:@"imageName"];
attachment.bounds = CGRectMake(0, 0, kGetP(316.5), kGetP(148));

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = kGetP(5);// 字体的行间距
NSMutableAttributedString *attachmentString = (NSMutableAttributedString *)[NSAttributedString attributedStringWithAttachment:attachment];
[_textView.textStorage appendAttributedString:attachmentString];

3.读取图片附件数据

NSAttributedString *attStr = cell.textView.attributedText;

NSMutableAttributedString *resutlAtt = [[NSMutableAttributedString alloc] initWithAttributedString:attStr];

__block NSUInteger index = 1;
//枚举出所有的附件字符串
__block NSUInteger base = 0;
[attStr enumerateAttributesInRange:NSMakeRange(0, attStr.length) options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(NSDictionary *attrs, NSRange range, BOOL *stop) {

    //NSTextAttachment value类型 key-NSAttachment 从字典中取得那一个图片
    //获取当前替换字符串的长度
    __block NSUInteger base = 0;
    NSTextAttachment *textAtt = attrs[@"NSAttachment"];
    WDLog(@"%@", textAtt.image);
    if (textAtt)
    {
        NSString *p = [NSString stringWithFormat:@"{{p%lu}}", (unsigned long)index];
        [resutlAtt replaceCharactersInRange:NSMakeRange(range.location + base, range.length)
                                 withString:p];
        base += p.length;
        index++;
    }  
      
}];

WDLog(@"---resutlAtt.string----- %@", resutlAtt.string);