试图让照片随机化并出现一次

Question

好的，所以我正在开发这个应用程序，但我遇到了一个问题......到目前为止，设置是这样的。我有 16 个按钮设置为图像。我在所有这些按钮上都设置了 arc4random() %16，以便所有按钮都有相同的机会成为 16 个图像之一。我为每种图片类型设置了一个 switch 语句，并让每种情况都等于一个不同的图像。现在，我想要的是所有图像都使用一次......应用程序运行时没有重复，我只希望它们以随机顺序排列。有什么办法可以做到吗？目前，当我运行该应用程序时，一些图像会出现不止一次，因为每个按钮都可以是 16 个图像之一。我只希望图像出现一次。我不确定该怎么做，也许在每个案例中添加 16 个 if/if else 语句？？？请帮忙！！！ 这是我当前第一个 switch 语句的语法。谢谢！

-(void)Picture1SelectedType{

switch (Picture1Type) {
    case 0:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Plastic-Brick-Man@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];

    }
        break;
    case 1:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Games-Console---1@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 2:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Old-Telephone@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 3:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Scarf@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 4:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Camera@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 5:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Tea-Cup@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 6:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Fruit-Computer---3@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 7:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Sugary-Drink@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 8:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Fruit-Computer@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 9:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Pocket-Watch@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 10:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Starship@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 11:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Games-Controller---1@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 12:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Two-tone-Shoe@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 13:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Lightbulb@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 14:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Bike@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;
    case 15:
    {
        UIImage *pictureImage = [UIImage imageNamed: @"Flower-Vase@Low.png"];
        [Picture1 setImage:pictureImage forState:UIControlStateNormal];
        [self.view addSubview:Picture1];
    }
        break;

    default:

        break;
}

Answer 1

将图像添加到数组中，然后使用代码here 随机打乱数组。