我不认为这是做到这一点的方法。
而不是你应该调用一个init方法：

- （id）initWithCGImage：（CGImageRef）image;

- （id）initWithTexture：（Texture2D *）tex;

- （id）initWithFile：（NSString *）imageFile;

在我的游戏中，我做了不同的，我有一个类为我的对象称为'Zed'，我也存储在一个数组。它有一个精灵作为一个字段，如果我想改变图像，我交换整个精灵，并确保我隐藏旧的，显示新的。

I'm trying to change the image that a sprite from an array is displaying. Here is the code I'm using:

((Sprite *)[enemiesArray objectAtIndex:index]).image = baseImage;

I get the error message:

error: request for member 'image' in something not a structure or union

What am I doing wrong?

Thanks for reading.

I don't think that this is the way to do this. Rather than that you should call one of the init methods:

- (id) initWithCGImage:(CGImageRef)image;

- (id) initWithTexture:(Texture2D*) tex;

- (id) initWithFile:(NSString *) imageFile;

In my game i do this differently, i have a class for my object called 'Zed' which i also store in an array. It has a sprite as a field and if i want to change the image i swap the whole sprite and make sure i hide the old and show the new one.