index.js:1375 Warning: A component is changing an uncontrolled input of type checkbox to be controlled.
Input elements should not switch from uncontrolled to controlled (or vice versa).
Decide between using a controlled or uncontrolled input element for the lifetime of the component.
More info: https://fb.me/react-controlled-components
<input type="checkbox" checked={indexArr[rindex]}
onChange={()=>this.onChange(rindex)}/>
是因为indexArr[]这个数值是空，操作它的时候就会出现上面这种错误显示，目前是使indexArr[]值不为空就可以了
