OnLengthChanged_ Function Callback
On length changed function binding lets you know when an element added or removed from an array. This function pattern is only available for arrays.
- The array must be declared as public(instance editable) on blueprints.
- The function name must follow this format OnLengthChanged_ArrayName
- Underscore character after OnLengthChanged is required.
- Click on ADD NEW and then BLUEPRINT CLASS on the Content Browser
- Pick Actor as parent class.
- Rename the actor name as “SimpleActor”.
- Click on the ADD COMPONENET under the Components tab. Search for the “ZDActor” and select the ZD ACTOR
- Click ADD NEW then VARIABLE under My Blueprints tab.
- Click on variable that you created, the Details panel will be shown in right side. Make it Array clicking pink bar on right-side of drop-down menu. Check Instance Editable.
- Click ADD NEW → FUNCTION on My Blueprint tab.
- Rename function name as OnLengthChanged_StringArray.
OnLengthChanged_ function pattern must required.
- Double click on OnLengthChanged_StringArray. Connect the node as shown in below. We set random integer between 0 and 42 to array element when array length changed(added a new element or deleted an element).
- Click actor that you created. Therefore on click Add Item. When we added or removed an element on string array, array value automatically set on blueprints.
Last modified 6mo ago