试图让照片随机化并出现一次

Question

好的，所以我正在研究这个应用程序，我遇到了一个问题......到目前为止，设置就是这个。我有16个按钮设置为图像。我对所有这些按钮设置了arc4random（）％16，这样所有按钮都有可能成为16个图像中的一个。我为每种图片类型设置了一个switch语句，每个case都有一个不同的图像。现在，我想要的是所有图像一次使用...当应用程序运行时没有重复，我只是想以随机顺序。有什么方法可以做到吗？目前，当我运行应用程序时，一些图像不止一次出现，因为每个按钮可以是16个图像中的一个。我只想让图像出现一次。我不知道该怎么做，也许在每个案例中添加16 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随机地重新排列数组。