I ran into this one last night while working on the new site for RockfordGrill.com. I have to admit this one stumped me and I had to do a whole bunch of digging around to figure it out. Once I discovered the issue, it made perfect sense but at the time (about 1:30 am) I was at a loss.
1203: No default constructor found in base class.
The Situation
I had written a pretty complex class (which required 3 arguments) to create the content sections for the website and wanted to extend it for a section that required additional elements. So I created the subclass that extended the base class and tested it which fired the error above. Below are 2 examples of classes that illustrate what I was doing:
BaseClass.as
package{
import flash.display.Sprite;
public class BaseClass extends Sprite{
public function BaseClass(arg1,arg2,arg3){
trace(arg1);
trace(arg2)
trace(arg3)
}
}
}
SubClass.as
package{
import BaseClass;
public class SubClass extends BaseClass{
public function SubClass(){
}
}
}
WTF!?
Typically when you extend a class you the constructor of the subclass automatically calls the constructor of the superclass it is extending. In this case no dice – so why?
Well according to the documentation you must implicitly call the constructor of the base class with a super statement if the base class requires 1 or more arguments. My base class took 3 – so that was the issue which as I said makes sense after a bit of sleep and a coffee.
The Fix
In the constructor of the subclass, I added a super statement with the arguments.
See below for the updated SubClass.as
package{
import BaseClass;
public class SubClass extends BaseClass{
public function SubClass(){
super(arg1,arg2,arg3)
}
}
}
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