<aura:iteration var="PIW" items="{!v.objInfo}">
            <thead>
                <tr>
                    <th>
                        <button class="slds-button slds-button_icon slds-button_icon-border-filled" aria-pressed="true" title="Like" value ="{!PIW.recordIds}" onclick = "{!c.showHide}" />
                    </th>

                </tr>
            </thead>


</aura:iteration>

showHide:function(component, event, helper) {
    var PIWrecord = event.target.value;
    console.log(PIWrecord);

showHide:function(component, event, helper) {
    var PIWrecord = event.currentTarget.value;
    console.log(PIWrecord);

public class rapidApprovalWrapper
{
    @AuraEnabled
    public List<lightWeightObject> recordIds;
    @AuraEnabled
    public String ObjName;
    @AuraEnabled
    public Boolean selected = false ;
    @AuraEnabled
    public Boolean status = false;
}