Warning: Input is changing an uncontrolled input of type text 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

warning.js?6327:33 Warning: `value` prop on `input` should not be null. Consider using the empty string to clear the component or `undefined` for uncontrolled components.
    in input (created by Input)
    in Input (created by AdvertisementEdit)
    in div (created by FormGroup)
    in FormGroup (created by AdvertisementEdit)
    in div (created by Col)
    in Col (created by AdvertisementEdit)
    in div (created by Row)
    in Row (created by AdvertisementEdit)
    in div (created by CardBlock)
    in CardBlock (created by AdvertisementEdit)
    in div (created by Card)
    in Card (created by AdvertisementEdit)
    in AdvertisementEdit (created by Connect(AdvertisementEdit))
    in Connect(AdvertisementEdit) (created by Route)
    in Route (created by Full)
    in Switch (created by Full)
    in div (created by Container)
    in Container (created by Full)
    in main (created by Full)
    in div (created by Full)
    in div (created by Full)
    in Full (created by Route)
    in Route
    in Switch
    in Router (created by ConnectedRouter)
    in ConnectedRouter
    in Provider

In the development of react, whenever there is a warning like this, it’s really hard for obsessive-compulsive disorder

The code is as follows

 <Select
                mode="multiple"
                size="large"
                style={{ width: '100%' }}
                placeholder="Please select"
                defaultValue={this.state.show}
                onChange={this.handleChangeOption}
            >
                {children}
            </Select>

Reason analysis: the select component needs to set a default value for it, which is given by the interface. If the front-end defines its own value, there is no problem, because react returns data through the interface in a certain period. When the component is rendered for the first time, the default value has been made effective. If it is re rendered later, the default value will not be changed

The default value is the default value, which takes effect when it is set for the first time; Value is the current value of select. Setting value = {this. State. Value} means that the current value of select is this. State. Value

Resources: default value or value for react form component

Solution: change the default value to value

<Select
                mode="multiple"
                size="large"
                style={{ width: '100%' }}
                placeholder="Please select"
                value={this.state.show}
                onChange={this.handleChangeOption}
            >
                {children}
            </Select>