手机扫描预览显示的二维码后，黑屏

打开调试界面，看到有红色报错，报错如下：

[xmldom error] element parse error:TypeError:

this.doc.createProcessingInstruction is not a function.(In ‘this.doc.createProcessingInstruction(a,b)’,'this.doc.createProcessingInstruction’ is undefined)

@#[line:1,col:1]