DynamicComponentController.js

DynamicComponentController.js

({
 createComponent : function(component, event, helper) {
  var index = component.get("v.index");
        $A.createComponent(
            "ui:Button",
            {
                "label":"Button " + index,
                "press":component.getReference("c.show")
            },
            function(button) {
                var body = component.get("v.body");
                
                body.push(button);
                console.log(body);
                component.set("v.body", body);
            }
        );
        index++;
        component.set("v.index", index);
 },
    
    removeComponent : function(component, event, helper) {
        component.set("v.body", []);
        component.set("v.index", 1);
 },
    
    show : function(component, event, helper) {
        var buttonLabel = event.getSource().get("v.label");
        component.set("v.buttonLabel", buttonLabel);
 }
})