从画布上擦除对象 [英] erase an object from canvas

问题描述

我正在尝试开发一个应用程序，我希望精灵在到达结束时将其擦除.我正在使用 arraylist 在画布上处理我的精灵.我希望精灵一旦 x<0(在画布之外)就从画布和数组列表中擦除自己，请尽快帮助我.谢谢

I am trying to develop an application and i want the sprites to erase once they reach the end. I am using arraylist to handle my sprites on a canvas. I want the sprites to erase themselves from the canvas and from the arraylist once their x<0 (outside of the canvas) Please help me asap. Thanks

这是我迄今为止的擦除命令代码:

This is my code so far for the erase command:

for(Sprite sprite : rockSprites){

            sprite.x -=10;
            if (Rect.intersects(sprite.dst, die))
            {
                rockSprites.remove(this);

                currentAmountOfSprites--;
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }


            }

它创建了越来越多的精灵，并且我传递了我放置的最大整数 (5).

it creates more and more sprites and i passes the max int that i put (5).

推荐答案

您是否应该使用 rockSprites.remove(sprite) 而不是使用 rockSprites.remove(this)?

Should you not be using the line rockSprites.remove(sprite) rather than using rockSprites.remove(this)?

因为它没有被列出，我假设你的渲染阶段实际上使用了 rockSprites ArrayList(?) 来确定应该在画布上放置哪些摇滚精灵?

Since it's not listed, I am going to assume that your render phase actually uses the rockSprites ArrayList(?) to determine what rock sprites should be put on the canvas?

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