ios - 随机 SpriteKit 纹理切换语句无法正常工作

Question

我目前正在 Objective C 中的 SpriteKit 中工作，我正在尝试在 switch 语句中将多个随机纹理设置为 9 个不同的 SKSpriteNode。目前，我的这部分代码如下所示:

int randomCard = arc4random_uniform(13);

switch (randomCard)
{
    case 0:
        staveCard = [SKTexture textureWithImageNamed:@"Card_C.png"];
        break;

    case 1:
        staveCard = [SKTexture textureWithImageNamed:@"Card_D.png"];           
        break;

    case 2:
        staveCard = [SKTexture textureWithImageNamed:@"Card_E.png"];
        break;

    case 3:
        staveCard = [SKTexture textureWithImageNamed:@"Card_F.png"];
        break;

    case 4:
        staveCard = [SKTexture textureWithImageNamed:@"Card_G.png"];
        break;

    case 5:
        staveCard = [SKTexture textureWithImageNamed:@"Card_A.png"];
        break;

    case 6:
        staveCard = [SKTexture textureWithImageNamed:@"Card_B.png"];
        break;

    case 7:
        staveCard = [SKTexture textureWithImageNamed:@"Card_C2.png"];
        break;

    case 8:
        staveCard = [SKTexture textureWithImageNamed:@"Card_D2.png"];
        break;

    case 9:
        staveCard = [SKTexture textureWithImageNamed:@"Card_E2.png"];                
        break;

    case 10:
        staveCard = [SKTexture textureWithImageNamed:@"Card_F2.png"];
        break;

    case 11:
        staveCard = [SKTexture textureWithImageNamed:@"Card_G2.png"];
        break;

    case 12:
        staveCard = [SKTexture textureWithImageNamed:@"Card_A2.png"];
        break;
}

faceDownStaveCard1 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard2 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard3 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard4 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard5 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard6 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard7 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard8 = [SKSpriteNode spriteNodeWithTexture:staveCard];
faceDownStaveCard9 = [SKSpriteNode spriteNodeWithTexture:staveCard];

当我在模拟器上运行它时，所有 Sprite 节点都显示相同的随机纹理。但是，我希望每个 Sprite 节点的纹理是随机的，每次选择不同的节点。

类似于:

• 从 switch 语句中选择随机纹理
• 添加到第一个 Sprite 节点
• 从 switch 语句中选择随机纹理
• 添加到第二个 Sprite 节点
• 等等

有人能帮忙吗？

Answer 1

你的程序现在的流程是:

• 创建随机数
• 选择 1 个纹理
• 将该纹理设置到每个节点

前两步的循环次数应与当前节点的次数相同。尝试类似的东西:

for (int i = 0; i<9; i++) {
    int randomCard = arc4random_uniform(13);
    switch (randomCard)
    {
        case 0:
            staveCard = [SKTexture textureWithImageNamed:@"Card_C.png"];
            break;

        case 1:
            staveCard = [SKTexture textureWithImageNamed:@"Card_D.png"];           
            break;

        case 2:
            staveCard = [SKTexture textureWithImageNamed:@"Card_E.png"];
            break;

        case 3:
            staveCard = [SKTexture textureWithImageNamed:@"Card_F.png"];
            break;

        case 4:
            staveCard = [SKTexture textureWithImageNamed:@"Card_G.png"];
            break;

        case 5:
            staveCard = [SKTexture textureWithImageNamed:@"Card_A.png"];
            break;

        case 6:
            staveCard = [SKTexture textureWithImageNamed:@"Card_B.png"];
            break;

        case 7:
            staveCard = [SKTexture textureWithImageNamed:@"Card_C2.png"];
            break;

        case 8:
            staveCard = [SKTexture textureWithImageNamed:@"Card_D2.png"];
            break;

        case 9:
            staveCard = [SKTexture textureWithImageNamed:@"Card_E2.png"];                
            break;

        case 10:
            staveCard = [SKTexture textureWithImageNamed:@"Card_F2.png"];
            break;

        case 11:
            staveCard = [SKTexture textureWithImageNamed:@"Card_G2.png"];
            break;

        case 12:
            staveCard = [SKTexture textureWithImageNamed:@"Card_A2.png"];
            break;
    }

    switch (i)
    {
        case 0:
            faceDownStaveCard1 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 1:
            faceDownStaveCard2 = [SKSpriteNode spriteNodeWithTexture:staveCard];        
            break;

        case 2:
            faceDownStaveCard3 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 3:
            faceDownStaveCard4 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 4:
            faceDownStaveCard5 = [SKSpriteNode spriteNodeWithTexture:staveCard]; 
            break;

        case 5:
            faceDownStaveCard6 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 6:
            faceDownStaveCard7 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 7:
            faceDownStaveCard8 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;

        case 8:
            faceDownStaveCard9 = [SKSpriteNode spriteNodeWithTexture:staveCard];
            break;
    }

}

这只是一个大概的流程，请优化代码。祝你好运!