Question

我似乎有一个数组范围问题。我有一个全局变量;

var itemConnect:Array = new Array();

在开始时初始化。然后我有一个函数将它填充为二维数组：

// Draw connections
function initConnections() {
 for (var i:Number = 0; i < anotherArray.length; i++) {
  for (var j:Number = 0; j < anotherArray[i].length; j++) {
   itemConnect[i] = new Array();
   itemConnect[i][j] = new Shape();
  }
 }
}

数据结构类似于：

CREATE: i = 0, j = 1, val = [object Shape]
CREATE: i = 0, j = 14, val = [object Shape]
CREATE: i = 1, j = 2, val = [object Shape]
CREATE: i = 1, j = 3, val = [object Shape]
CREATE: i = 1, j = 4, val = [object Shape]
CREATE: i = 1, j = 5, val = [object Shape]
CREATE: i = 1, j = 6, val = [object Shape]
...

如果我尝试在另一个函数中访问此数组，我只是得到这个：

i = 0, j = 14, val = [object Shape]
i = 1, j = 51, val = [object Shape]
TypeError: Error #1010: A term is undefined and has no properties.
 at main_fla::MainTimeline/mouseDownHandler()

我尝试在开始时将数组初始化为2-d数组，如下所示：

var itemConnect:Array = new Array();
for (var counti = 0; counti < anotherArray.length; counti++) {
 itemConnect[counti] = new Array();
}

产生稍好的结果，但仍然遗漏了许多节点：

i = 0, j = 14, val = [object Shape]
i = 1, j = 51, val = [object Shape]
i = 3, j = 47, val = [object Shape]
i = 6, j = 42, val = [object Shape]
i = 7, j = 42, val = [object Shape]
i = 8, j = 45, val = [object Shape]
i = 9, j = 42, val = [object Shape]
...

它似乎只能访问每个[i]节点中的一个，因此[1] [2]，[1] [3]，[1] [4]丢失 - 只有最后一个[j] ]元素出现。

这样做的正确方法是什么？我也不知道在开始时阵列的确切大小可能是一个问题。

由于

Answer 1

你的嵌套循环是不是看起来更像这样？

function initConnections() {
    for (var i:Number = 0; i < anotherArray.length; i++) {
        itemConnect[i] = new Array();
        for (var j:Number = 0; j < anotherArray[i].length; j++) {
            itemConnect[i][j] = new Shape();
        }
    }
}

请注意，在这个版本中，内部数组的构造发生在循环之外，意味着迭代它。

Actionscript 3数组范围/多维数组问题

1 个答案: