无法将类型 ... 的值转换为类型

Question

我在将我的元组作为 NSArray 时遇到错误。

我的代码如下所示

var Name: [String] = []
var Requested: [String] = []
var Time: [String] = []
var Status: [String] = []

var filtered: [(process:String, requestor:String, creation:String, status:String)] = []
var allItems: [(process:String, requestor:String, creation:String, status:String)] = []

for i in 0...Name.count{
        if(Name[safe: i] != nil && Requested[safe: i] != nil && Time[safe: i] != nil && Status[safe: i] != nil)
        {
        allItems += [(process:Name[i], requestor:Requested[i], creation:Time[i], status:Status[i])]
        }
    }
    let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)
    let array = (allItems as NSArray).filteredArrayUsingPredicate(searchPredicate)

我想在这种情况下使用 filteredArrayUsingPredicate。但是我正面临

Cannot convert value of type '[(process: String, requestor: String, creation: String, status: String)]' to type 'NSArray' in coercion

谁能告诉我为什么会遇到这个错误？

Answer 1

Can anyone tell me why am I facing this error?

当然可以。 NSArray 是一个 Objective-C class。唯一可以作为 NSArray 元素的对象是 Objective-C 个对象。 Objective-C中没有元组这种东西；一个元组是一个 Swift 对象。 Swift 个对象的数组无法转换为 NSArray。

无法将类型 ... 的值转换为类型

Cannot convert value of type ... to type

nsarray

swift