子级

    @Output() checkValue: EventEmitter<any> = new EventEmitter();
    
    // 子级 有个单选 将这个 checkValue 返回到父级
    radioChange (data: any) {
        this.checkValue.emit(data.detail.value)
    }

父级

    async presentPopover(ev: any) {
        const popover = await this.popoverController.create({
            component: UserListComponent,
            // UserListComponent 是我的子组件
            // 这里怎么接收 checkValue
            componentProps: {
                userId: this._id
            },
            event: ev,
            translucent: true
        });
        return await popover.present();
    }