Crash <The specified child already has a parent>

[wangchongwei]

when i use it like Example,it's crashed,
<The specified child already has a parent. You must call removeView() on the child's parent first.>
But it's ok when use like this:
return (

<PDFView
key={'sop'}
path={this.pdfPath}
pageNumber={1}
onLoadComplete={(pageCount) => {
this.setState({ pageCount });
console.log(pdf共有: ${pageCount}页);
}}
style={styles.pdf}
/>

);
But the PDF looks blurred.