ios 展示html文本中图片自适应宽度,iOS 富文本加载html使图片宽高自适应

-(void)setHtmlStr:(NSString *)htmlStr{

NSString*detailTextString = [NSString stringWithFormat:@"%@",htmlStr];

NSString*str = [NSString stringWithFormat:@"

%@",SCREEN_WIDTH,detailTextString];

NSMutableAttributedString*attributeString = [[NSMutableAttributedString alloc]initWithData:[str dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} documentAttributes:nil error:nil];

self.label.attributedText = attributeString;

}