显示富文本数据，不显示图片等。

vue中v-html富文本使用管道钩子无效，但是在uni-app富文本显示器有效

	formatRichText: function(html) { //控制小程序中图片大小
		if(!html) return
		let newContent= html.replace(/<img[^>]*>/gi,function(match,capture){
			match = match.replace(/style="[^"]+"/gi, '').replace(/style='[^']+'/gi, '');
			match = match.replace(/width="[^"]+"/gi, '').replace(/width='[^']+'/gi, '');
			match = match.replace(/height="[^"]+"/gi, '').replace(/height='[^']+'/gi, '');
			return match;
		});
		newContent = newContent.replace(/style="[^"]+"/gi,function(match,capture){
			match = match.replace(/width:[^;]+;/gi, 'max-width:100%;').replace(/width:[^;]+;/gi, 'max-width:100%;');
			return match;
		});
		newContent = newContent.replace(/<br[^>]*\/>/gi, '');
		newContent = newContent.replace(/\<img/gi, '<img style="max-width:100%;height:auto;display:inline-block;margin:10rpx auto;"');
		return newContent;
	}