为了解释我的问题,我写了一些代码。
这是超类:
package
{
public class Cclass
{
public function Cclass(a:int, words:String)
{
trace("i am:"+a," years old and i will:"+words," you");
}
}
}
这是子类:
package
{
public class Dclass extends Cclass
{
public function Dclass(a:int, words:String)
{
super(a, words);
trace(a, words);
}
}
}
当我测试它时,我得到以下输出:
i am:5 years old and i will:kill you
i am:6 years old and i will:strangle you
6 strangle
super运行Cclass
的构造函数并再次执行相同的操作,但是如果我尝试在没有“super(a,words)”的情况下运行它,则它不起作用,这是可以理解的。我的问题是如何使Dclass
仅显示trace(a, words);
而不运行Cclass
的构造函数。我想得到这个输出:
i am:5 years old and i will:kill you
6 strangle
答案 0 :(得分:1)
扩展类时,AS3运行时将自动调用基类构造函数
因此,您可以假设在扩展类时,无论您是否编写代码,都会发生super.constructor
这就是为什么最好不要在构造函数中包含任何代码。
这并不意味着通过一点点按摩你就无法解决它
public class Cclass{
public function Cclass( ){
}
public function doTrace( a:int, words:String):void{
trace("i am:"+a," years old and i will:"+words," you");
}
}
public class Dclass extends Cclass{
public function Dclass(){
//super();// this is implied that it will always happen
}
public function myTrace(a:int, words:String):void{
this.doTrace(a, words);
}
}
var dClass:Dclass = new Dclass()
dClass.myTrace(5,'kill')
答案 1 :(得分:1)
超级构造函数总是在actionscript中运行,如果你没有声明它,它会自动运行它。最好的方法是使它成为一种功能。
public class cc {
public function doSomething(a:int, words:String)
{
trace("i am:"+a," years old and i will:"+words," you");
}
}
public class dd extends cc {
override public function doSomething(a:int, words:String) {
trace("i am:"+a," years old and i will:"+words," you");
}
}
var d = new dd();
d.doSomething(5, 'kill');