Question

好的，想法很简单，在舞台上设置按钮，点击按钮改变颜色来绘制。我正在努力学习flash＆amp;动作脚本并不确定我的问题在哪里，但我无法弄清楚如何做到这一点。

package {
import flash.display.Sprite;
import flash.events.MouseEvent;

public class Artist extends Sprite {
    public var drawing:Boolean;
    public var colorArray:Array;
    public var dc;

    public function colors() {
        colorArray = ["0xFF0000","0xFFA500","0xFFFF00","0x00FF00","0x0000FF","0x4B0082","0x8F00FF","0xFF69B4","0x00CCFF","0x008000","0x8B4513"];

        for (var i:int = 0; i < colorArray.length; i++) {
        this["btn_" + i].addEventListener(MouseEvent.CLICK, set_color);
        }
    }

    public function set_color(e:MouseEvent):void {
        dc = colorArray;
    }

    public function Artist() {
        graphics.lineStyle(10,dc);
        drawing = false;
        stage.addEventListener(MouseEvent.MOUSE_DOWN, startDrawing);
        stage.addEventListener(MouseEvent.MOUSE_MOVE, draw);
        stage.addEventListener(MouseEvent.MOUSE_UP, stopDrawing);
    }

    public function startDrawing(event:MouseEvent):void {
        graphics.moveTo( mouseX, mouseY);
        drawing = true;
    }

    public function draw(event:MouseEvent) {
        if(drawing) {
            graphics.lineTo(mouseX,mouseY);
        }
    }

    public function stopDrawing(event:MouseEvent) {
        drawing = false;
    }
}

}

Answer 1

您应该通过按钮名称获取索引，然后您可以使用单击的索引分配颜色。

for (var i:int = 0; i < colorArray.length; i++) {
    this["btn_" + i].addEventListener(MouseEvent.CLICK, set_color);
}

public function set_color(e:MouseEvent):void {
    // Get the button name and fetch it's index
    var index:int = int(e.currentTarget.name.substring(4));
    dc = colorArray[index];
}

另外，如果要在方法中访问colorArray，请确保整个类中都知道colorArray。只需在colors方法之外定义它就像Lukasz所说： protected var colorArray:Array使用数字而不是字符串0xFF0000代替"0xFF0000"

Answer 2

使用Button上的tag属性将颜色（或颜色索引）设置为按钮本身，然后在点击处理程序中通过event.sender.tag读取此标记。
您还可以使用颜色数组中的标记（以及其他数组中的名称）生成按钮。

动作脚本3，设置颜色变量onClick按钮

2 个答案: