ios - 参数类型 'AnyObject' 不符合预期类型 NSCopying

Question

我尝试在 Swift 中使用 NSDictionary ，但遇到了上述问题。我有以下格式的字典:

let xyz: NSMutableDictionary = ["1":[1,2,3,4,"1","n","1","2"],"2":[1,2,3,4,"+","o","6","2"]]

我想迭代字典中的键并提取数组的第 6 个元素。我尝试了以下方法；但没有遇到任何运气:

for keys in dictKeyMutableDict {
    let xCentVal = xyz[keys as! [NSCopying]][6]
}

我不断收到下标错误，如果我删除 as! [NSCopying]，我收到上述错误。有谁知道如何处理这种情况吗？

Answer 1

删除 NSMutableDictionary 并通过将其设为 var 使其可变。现在您可以删除 as! [NS复制]

var xyz = ["1":[1,2,3,4,"1","n","1","2"],"2":[1,2,3,4,"+","o","6","2"]]

for keys in dictKeyMutableDict {
    let xCentVal = xyz[keys]![6]
}

或者更好地选择打开它:

for keys in dictKeyMutableDict {
    if let v = xyz[keys] {
        let xCentVal = v[6]
    }
}