随机选择三个图像

Question

我想随机选择三张图片之一，我相信我应该使用arc4random()，但我无法确定。这是我的简单代码：

SPImage *image = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];
SPImage *image1 = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];
SPImage *image2 = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];

Answer 1

解决问题!!

这将完全符合您的要求，

SPImage *image = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];
SPImage *image1 = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];
SPImage *image2 = [SPImage imageWithTexture:[balloonTextures objectAtIndex:0]];

NSArray *imageArray = [[NSArray alloc] initWithObjects:image,image1,image2, nil];
int random = arc4random() % 3;

SPImage *myRandomImage = [imageArray objectAtIndex:random];

Answer 2

试试这个：

NSArray *imageArray = [[NSArray alloc] initWithObjects:image,image1,image2, nil];
SPImage *randomImage = [imgArray objectAtIndex:arc4random_uniform(3)];