将UIRichText demo中的代码移至cocos2d-h5 3.16版本中，图片与文字发生了覆盖
部分代码如下：
let richText = new ccui.RichText();
richText.ignoreContentAdaptWithSize(false);
richText.width = 120;
richText.height = 100;
let re1 = new ccui.RichElementText(1, cc.color.WHITE, 255, "This color is white. ", "Helvetica", 10);
let re2 = new ccui.RichElementText(2, cc.color.YELLOW, 255, "And this is yellow. ", "Helvetica", 10);
let re3 = new ccui.RichElementText(3, cc.color.BLUE, 255, "This one is blue. ", "Helvetica", 10);
let re4 = new ccui.RichElementText(4, cc.color.GREEN, 255, "And green. ", "Helvetica", 10);
let re5 = new ccui.RichElementText(5, cc.color.RED, 255, "Last one is red ", "Helvetica", 10);
var reimg = new ccui.RichElementImage(6, cc.color.WHITE, 255, "res/normal.png");
richText.pushBackElement(re1);
richText.insertElement(re2, 1);
richText.pushBackElement(re3);
richText.pushBackElement(re4);
richText.pushBackElement(reimg);
richText.pushBackElement(re5);
this.addChild(richText);
richText.x = 800;
richText.y = 400;