使用多维数组时,Swift上的多维数组 – EXC_BAD_INSTRUCTION(代码

为了更好地说明这里的代码：

let block1:Form[] = [Form.Circle,Form.Rectangle,Form.Triangle]
let block2:Form[] = [Form.Rectangle,Form.Circle,Form.Triangle]
let block3:Form[] = [Form.Rectangle,Form.Triangle,Form.Circle]
let block4:Form[] = [Form.Circle,Form.Rectangle]
let block5:Form[] = [Form.Triangle,Form.Rectangle]
let block6:Form[] = [Form.Triangle,Form.Circle]
var allBlocks:(Form[][])!

这些是包含枚举的数组,最后一个将保存这些数组.

override func didMoveToView(view: SKView) {

          allBlocks = [block1,block2,block3,block4,block5,block6] //Error here
...
}

当我尝试将值分配给allBlocks时发生错误

如果我将代码更改为此,则不会出现错误：

let block1:Form[] = [Form.Circle,Form.Circle]

override func didMoveToView(view: SKView) {

         var allBlocks = [block1,block6] //No error
...
}

但后来我无法在另一个地方访问allBlocks变量.

编辑：如果有帮助