Question

我是一个正在尝试将参数传递给函数的AS3菜鸟。有人可以帮助我理解为什么当以下代码都在一个AS3文件中时，如下所示它可以工作并绘制紫色方块......

package{
import flash.display.*;
public class Main extends Sprite{ 
        public function Main(){

    var square_commands:Vector.<int> = new Vector.<int>(5,true); 

square_commands[0] = 1;//moveTo 
square_commands[1] = 2;//lineTo 
square_commands[2] = 2; 
square_commands[3] = 2; 
square_commands[4] = 2; 

var square_coord:Vector.<Number> = new Vector.<Number>(10,true); 
square_coord[0] = 20; //x 
square_coord[1] = 10; //y 
square_coord[2] = 50; 
square_coord[3] = 10; 
square_coord[4] = 50; 
square_coord[5] = 40; 
square_coord[6] = 20; 
square_coord[7] = 40; 
square_coord[8] = 20; 
square_coord[9] = 10; 

Fill(square_commands, square_coord);
}
public function Fill(a:Vector.<int>,b:Vector.<Number>){
import flash.display.*;
    graphics.beginFill(0x442266);//set the color
    graphics.drawPath(a, b);
}
}
}

然而，当我将代码分成两个AS3文件并尝试将参数传递给函数时，如下所示......

package{
import flash.display.*;
public class Main extends Sprite{ 
        public function Main(){

    var square_commands:Vector.<int> = new Vector.<int>(5,true); 

square_commands[0] = 1;//moveTo 
square_commands[1] = 2;//lineTo 
square_commands[2] = 2; 
square_commands[3] = 2; 
square_commands[4] = 2; 

var square_coord:Vector.<Number> = new Vector.<Number>(10,true); 
square_coord[0] = 20; //x 
square_coord[1] = 10; //y 
square_coord[2] = 50; 
square_coord[3] = 10; 
square_coord[4] = 50; 
square_coord[5] = 40; 
square_coord[6] = 20; 
square_coord[7] = 40; 
square_coord[8] = 20; 
square_coord[9] = 10; 

Fill(square_commands, square_coord);
}
}
}

和...

package{
import flash.display.*;
public class Fill extends Sprite{
public function Fill(a:Vector.<int>,b:Vector.<Number>){
    graphics.beginFill(0x442266);//set the color
    graphics.drawPath(a, b);
}
}
}

Flash CS5给出了一条错误消息1137，表示它在代码行中只需要1个参数 - ＆gt;填充（square_commands，square_coord）;

有人可以解释我如何将参数square_commands和square_coord传递给第二个AS3文件中的函数吗？

提前感谢所有帮助!!!

Answer 1

您不需要创建单独的Fill类，您应该在单独的文件中创建一个Fill函数，它位于您的Main文件所在的同一个包中。所以你的Fill.as文件可能如下所示：

// ActionScript file
package{
    import flash.display.Sprite;
    public function Fill(target:Sprite, a:Vector.<int>,b:Vector.<Number>):void{
        target.graphics.beginFill(0x442266);//set the color
        target.graphics.drawPath(a, b);
        }
}

提及附加参数target，它将提供Sprite，其中应绘制矩形。

函数调用可能看起来：

Fill(this, square_commands, square_coord);

Answer 2

// main.as
package{
  // good practice is to declare all imports in one spot and at the top of the class.
  import flash.display.*;
  public class Main extends Sprite{ 
    public function Main(){
      var square_commands:Vector.<int> = new Vector.<int>(5,true); 
          square_commands[0] = 1;//moveTo 
          square_commands[1] = 2;//lineTo 
          square_commands[2] = 2; 
          square_commands[3] = 2; 
          square_commands[4] = 2; 

      var square_coord:Vector.<Number> = new Vector.<Number>(10,true); 
          square_coord[0] = 20; //x 
          square_coord[1] = 10; //y 
          square_coord[2] = 50; 
          square_coord[3] = 10; 
          square_coord[4] = 50; 
          square_coord[5] = 40; 
          square_coord[6] = 20; 
          square_coord[7] = 40; 
          square_coord[8] = 20; 
          square_coord[9] = 10; 


      // notice we are passing the parameters to the constructor of the Fill class
      var fill = new Fill(square_commands, square_coord);
    }
  }
}



// Fill.as
package{
  import flash.display.*;
  public class Fill extends Sprite{

    // A function with the same name of the class file is the constructor.
    // A constructor will be called every time the new operator is called like I did in main.
    public function Fill(a:Vector.<int>,b:Vector.<Number>){
      graphics.beginFill(0x442266);//set the color
      graphics.drawPath(a, b);
    }
  }
}

I suggest you read up on OOP and learn it if you are going to do lots of coding.

关于将参数传递到位于单独的AS3文件中的函数的Noob问题

2 个答案: