React 动态更新子项item从array数据

// 初始化state
this.state = {
  files: [],
}

// 添加数据到array
this.setState({
  files: [
    ...this.state.files,
    fileInfo
  ]
});

// 动态移除子项从array
removePic(index) {
    this.setState({
      files: this.state.files.filter((_, i) => i !== index)
    })
  }

// 循环显示数据
{state.files.map((file, index) => (
  <li key={index}>
    <span className="del" onClick={this.removePic.bind(this, index)}>
      <a href="javascript:;"><img src="" /></a>
    </span>
    <span className="p_img">
      <a href="javascript:;">
        <img src={file.src} />
      </a>
    </span>
  </li>
))}