ios - 搜索栏在 swift 3 中不起作用。无法将类型 (_) -> Bool 的值转换为预期的参数类型 NSPredicate

Question

不断显示错误:无法将类型 (_) -> Bool 的值转换为预期的参数类型 NSPredicate在线:

filtered = OrdersArray.filter(using: { (text) -> Bool in
            let tmp: NSString = text
            let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)

    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

        filtered = OrdersArray.filter(using: { (text) -> Bool in
            let tmp: NSString = text
            let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
            return range.location != NSNotFound
        })

        if(filtered.count == 0){
            searchActive = false;
        } else {
            searchActive = true;
        }
        self.tableView.reloadData()
    }

UISearchBarDelegate、UISearchDisplayDelegate 委托(delegate)均已标记searchBarTextDidBeginEditing，searchBarTextDidEndEditing，searchBarCancelButtonClicked，searchBarSearchButtonClicked功能已写请告诉我还可以做什么来搜索 NSMutableArray 中的数据。

这是我的数组。

{
orders =     (
            {
        "created_at" = "2017-05-01 04:49:17";
        id = 591;
        "order_status" = CONFIRMED;
        "pickup_code" = 4356219;
        store =             {
            address1 = "**********";
            city = "**********";
            description = "*************";
            logo = "fghdshdx.png";
            name = "*******";
            "postal_code" = 110006;
            storeTotal = "20.00";
            "store_id" = 4;
            "tin_number" = M1O2R3E4MORE;
        };
        total = "20.00";
        "updated_at" = "2017-05-01 04:49:20";
        "user_address_id" = "<null>";
        "user_id" = 5372;
        "user_name" = "Amit Sinha";
    }
);
status = 1;

Answer 1

只是不要使用NSArray!

我猜你的 OrdersArray 是一个 NSArray 或 NSMutableArray。您应该首先将其转换为快速数组:

let swiftArray = Array(OrdersArray).map {  $0 as! NSString }

然后过滤swift数组:

filtered = swiftArray.filter(using: { (text) -> Bool in
    let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
    return range.location != NSNotFound
})