Question

我有一个带有字典的NSArray，如下所示：

{
    count = 7;
    week = 4;
}

{
    count = 9;
    week = 5;
}

如何将NSArray中的这些词典转换为两个如下所示的数组：

weeks = [4, 5]
count = [7, 9]

我尝试过：let array = Array(arrayLiteral: results.valueForKey("month"))

但是回来吧

[(
    4,
    5
)]

谢谢

Answer 1

您可以使用flatMap并将其条件转换为Int以提取字典值，如下所示：

let nsArray = NSArray(array: [["count":7,"week":4],["count":9,"week":5]])

let weeks = nsArray.flatMap{$0["week"] as? Int}
let count = nsArray.flatMap{$0["count"] as? Int}

print(weeks)  // "[4, 5]"
print(count)  // "[7, 9]"

swift - 将Dictionary的值放在NSArray中的Array中

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