arrays - swift :changing the content of an array gives me an error

Question

我有这个数组:

var array = [[12,46,["a","b","c"],"nil",true,7,true],[10,40,["c","d","e"],"nil",true,7,true],[0,1,["z","l","w"],"hey",false,7,true]].

当我尝试通过此代码更改数组 bool 值的最后一个 bool 值时:

array[0][6] = false

我得到这个错误“无法通过下标分配下标是只获取数组”

Answer 1

很有趣。我认为编译器在某个地方绊倒了。您只需检查数组的类型即可了解原因:

var array = [
    [12,46,["a","b","c"],"nil",true,7,true],
    [10,40,["c","d","e"],"nil",true,7,true],
    [0,1,["z","l","w"],"hey",false,7,true]
]

print(array.dynamicType) // Array<NSArray>
                         // can't assign to the inner array since NSArray is immutable

给 Swift 一个内部类型的提示，它就起作用了

var array: [[AnyObject]] = [
    [12,46,["a","b","c"],"nil",true,7,true],
    [10,40,["c","d","e"],"nil",true,7,true],
    [0,1,["z","l","w"],"hey",false,7,true]
]

array[0][6] = false     // works