ios - NSArray转Swift Array后Array为空

Question

我最近在研究 Swift。我正在使用自定义 TableView 执行搜索功能。我关注了this家伙为了让我的搜索工作完美，但我在从 NSArray 到 Swift Array 的转换时遇到了问题。

这是我的代码。

func updateSearchResultsForSearchController(searchController: UISearchController) {
    filtered.removeAll(keepCapacity: false)
    proccessArray.removeAll(keepCapacity: false)
    print("start")
    var array = []
    for i in 0...arrProcessName.count{
        if(arrProcessName[safe: i] != nil && arrRequestedBy[safe: i] != nil && arrCreationTime[safe: i] != nil && arrStatus[safe: i] != nil)
        {
            var newProcess = Process(process: arrProcessName[i], requestor: arrRequestedBy[i], time: arrCreationTime[i], status: arrStatus[i])
            self.proccessArray.append(newProcess)
        }
    }
    print("array: ", proccessArray)
    let searchPredicate = NSPredicate(format: "status CONTAINS[c] %@", "pending")
    array = (proccessArray as NSArray).filteredArrayUsingPredicate(searchPredicate)
    print("array: ", array)
    let arr2 = (array as Array).map { $0 as? String ?? "" }
    filtered = arr2
    print("filtered: ", filtered)

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

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    removeProgressBar()
    let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! HistoryCustomCell

    cell.selectionStyle = .None
    cell.accessoryType = UITableViewCellAccessoryType.None

    if self.searchCtrler.active {
        print("processArray: ",proccessArray[indexPath.row].status as String!)
        cell.lbl_status.text = proccessArray[indexPath.row].status as String!
    } else {
        cell.lbl_request_name.text = arrProcessName[indexPath.row]
        cell.lbl_requested_by.text = "Requested by: " + arrRequestedBy[indexPath.row]
        cell.lbl_creation_time.text = arrCreationTime[indexPath.row]
        cell.lbl_status.text = arrStatus[indexPath.row]

        switch arrStatus[indexPath.row] {
            case "Completed", "Approved":
                cell.img_status.image = UIImage(named: "ic_approved")
            case "Running", "Processing", "Pending":
                cell.img_status.image = UIImage(named: "ic_pending")
            case "Denied", "Rejected":
                cell.img_status.image = UIImage(named: "ic_reject")
            case "Error":
                cell.img_status.image = UIImage(named: "ic_terminated")
            case "Retracted":
                cell.img_status.image = UIImage(named: "ic_retracted")
            default:
                cell.img_status.image = UIImage(named: "")
        }
    }

    return cell
}

类(class)流程

import Foundation

class Process:NSObject{
var process: NSString!
var requestor: NSString!
var time: NSString!
var status: NSString!

init(process:NSString, requestor:NSString, time: NSString, status: NSString){
    self.process = process
    self.requestor = requestor
    self.time = time
    self.status = status
}

}

我打印了数组，结果是这样的。

array:  (
   "< X.Process: 0x7f8bc94cfa50>"
)

过滤后的转换。我得到一个空数组，这让我遇到了 EXC_BAD_INSTRUCTION。

有没有办法将我的 NSArray 转换为 Swift 数组而不影响我在 NSArray 中的数据？

谢谢

Answer 1

不需要将 Swift 数组 [Process] 转换为 NSArray 只是为了过滤，您可以直接过滤您的 [Process] 数组像这样。

let filterProcess = self.proccessArray.filter { $0.status == "pending" }

在你的情况下没有必要使用 contains 但如果你想那么:

let filterProcess = self.proccessArray.filter { $0.status.localizedCaseInsensitiveContainsString("pending") }