我是Swift语言和iOS平台上的新开发人员。我一直在阅读许多关于在表格中实现搜索功能的指南和教程。
但是，没有一个能比得上我的需要。所以，我的问题是：我将如何实现搜索包含数据库数据的表并从4个数组中填充？
表格的代码
import UIKit
class VieworderTVC: UIViewController,UITableViewDataSource, UITableViewDelegate {
var deleteOrderIndexPath: NSIndexPath? = nil
@IBAction func btnRefresh(sender: UIBarButtonItem) {
orderIDData.removeAll()
ItemNoData.removeAll()
BPnoData.removeAll()
QuantityData.removeAll()
self.tblview.reloadData()
get_data_from_url("http://100.1.1.25/sfc/orders.php")
return
}
@IBOutlet weak var tblview: UITableView!;
var orderIDData:Array< String > = Array < String >()
var ItemNoData:Array< String > = Array < String >()
var BPnoData:Array< String > = Array < String >()
var QuantityData:Array< String > = Array < String >()
override func viewDidLoad() {
super.viewDidLoad()
get_data_from_url("http://100.1.1.25/sfc/orders.php")
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return orderIDData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! OrderViewCell
print(indexPath.row)
cell.orderLabel.text = orderIDData[indexPath.row]
cell.lblitem.text = ItemNoData[indexPath.row]
cell.lblbp.text = BPnoData[indexPath.row]
cell.lblquantity.text = QuantityData[indexPath.row]
return cell
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
deleteOrderIndexPath = indexPath
let OrderToDelete = orderIDData[indexPath.row]
confirmDelete(OrderToDelete)
}
}
// Delete Confirmation and Handling
func confirmDelete(planet: String) {
let alert = UIAlertController(title: "Delete Planet", message: "Are you sure you want to permanently delete order \(planet)?", preferredStyle: .ActionSheet)
let DeleteAction = UIAlertAction(title: "Delete", style: .Destructive, handler: handleDeletePlanet)
let CancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: cancelDeleteOrder)
alert.addAction(DeleteAction)
alert.addAction(CancelAction)
self.presentViewController(alert, animated: true, completion: nil)
}
func handleDeletePlanet(alertAction: UIAlertAction!) -> Void {
if let indexPath = deleteOrderIndexPath {
tblview.beginUpdates()
let OrderNo = orderIDData[indexPath.row];
let myUrl = NSURL(string: "http://100.1.1.25/sfc/deleteorder.php");let request = NSMutableURLRequest(URL:myUrl!);
request.HTTPMethod = "POST";
// Compose a query string
let postString = "OrderNo=\(OrderNo)";
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
if error != nil
{
print("error=\(error)")
return
}
// You can print out response object
print("response = \(response)")
// Print out response body
let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("responseString = \(responseString)")
//Let’s convert response sent from a server side script to a NSDictionary object:
//var err: NSError?
let myJSON = try! NSJSONSerialization.JSONObjectWithData(data!, options: .MutableLeaves) as? NSDictionary
if let parseJSON = myJSON {
let resultValue = parseJSON["status"] as? String!;
print("result: \(resultValue)");
var isOrderDeleted:Bool = false;
if (resultValue == "Success") {isOrderDeleted = true;}
var DisplayMessage: String = parseJSON["message"] as! String!;
if (!isOrderDeleted) {
DisplayMessage = parseJSON["message"] as! String!
}
dispatch_async(dispatch_get_main_queue(), {
let alerting = UIAlertController(title:"Alert", message:DisplayMessage, preferredStyle: UIAlertControllerStyle.Alert);
let ok = UIAlertAction(title: "Ok", style:UIAlertActionStyle.Default, handler: nil)
alerting.addAction(ok);
self.presentViewController(alerting, animated: true, completion: nil)
});
}
}
task.resume()
orderIDData.removeAtIndex(indexPath.row)
ItemNoData.removeAtIndex(indexPath.row)
BPnoData.removeAtIndex(indexPath.row)
QuantityData.removeAtIndex(indexPath.row)
// Note that indexPath is wrapped in an array: [indexPath]
tblview.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
deleteOrderIndexPath = nil
tblview.endUpdates()
}
}
func cancelDeleteOrder(alertAction: UIAlertAction!) {
deleteOrderIndexPath = nil
}
func get_data_from_url(url:String)
{
let httpMethod = "GET"
let url = NSURL(string: url)
let urlRequest = NSMutableURLRequest(URL: url!,
cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData,
timeoutInterval: 15.0)
let queue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(
urlRequest,
queue: queue,
completionHandler: {(response: NSURLResponse?,
data: NSData?,
error: NSError?) in
if data!.length > 0 && error == nil{
let json = NSString(data: data!, encoding: NSASCIIStringEncoding)
self.extract_json(json!)
}else if data!.length == 0 && error == nil{
print("Nothing was downloaded")
} else if error != nil{
print("Error happened = \(error)")
}
}
)
}
func extract_json(data:NSString)
{
//let parseError: NSError?
let jsonData:NSData = data.dataUsingEncoding(NSASCIIStringEncoding)!
let json: AnyObject? = try! NSJSONSerialization.JSONObjectWithData(jsonData, options: .MutableContainers)
if let orders_list = json as? NSArray
{
for (var i = 0; i < orders_list.count ; i++ )
{
if let orders_obj = orders_list[i] as? NSDictionary
{
if let order_id = orders_obj["OrderID"] as? String
{
if let order_ItemNo = orders_obj["ItemNo"] as? String
{
if let order_bpNo = orders_obj["BPno"] as? String
{
if let order_quantity = orders_obj["Quantity"] as? String
{
//TableData.append(order_id + " [" + order_ItemNo + "]")
orderIDData.append(order_id)
ItemNoData.append(order_ItemNo)
BPnoData.append(order_bpNo)
QuantityData.append(order_quantity)
}
}
}
}
}
}
}
do_table_refresh();
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.tblview.reloadData()
return
})
}
细胞代码
import UIKit
class OrderViewCell: UITableViewCell {
@IBOutlet weak var orderLabel: UILabel!
@IBOutlet weak var lblitem: UILabel!
@IBOutlet weak var lblquantity: UILabel!
@IBOutlet weak var lblbp: UILabel!
}
我设法通过以下方式解决了这个问题：
import UIKit
extension UITableViewCell {
func setTransparent() {
let bgView: UIView = UIView()
bgView.backgroundColor = .clearColor()
self.backgroundView = bgView
self.backgroundColor = .clearColor()
}
}
class VieworderTVC: UIViewController,UITableViewDataSource, UITableViewDelegate {
var manualBP = ""
var deleteOrderIndexPath: NSIndexPath? = nil
@IBAction func btnRefresh(sender: UIBarButtonItem) {
orderIDData.removeAll()
ItemNoData.removeAll()
BPnoData.removeAll()
QuantityData.removeAll()
self.tblview.reloadData()
get_data_from_url("http://x.x.x/sfc/orders.php")
return
}
@IBAction func filterOrder(sender: AnyObject) {
// 1
let optionMenu = UIAlertController(title: nil, message: "Choose Option", preferredStyle: .ActionSheet)
// 2
let BPAction = UIAlertAction(title: "Filter by BP number", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
// let alertController = UIAlertController(title: "How to enter BP number?", message: nil, preferredStyle: UIAlertControllerStyle.Alert)
//
//
// let manEnt = UIAlertAction(title: "Manual", style: UIAlertActionStyle.Default, handler: {(alert :UIAlertAction!) in
//1. Create the alert controller.
let alert = UIAlertController(title: "BP number entry", message: "Enter the BP number:", preferredStyle: .Alert)
//2. Add the text field. You can configure it however you need.
alert.addTextFieldWithConfigurationHandler({ (textField) -> Void in
textField.text = ""
})
//3. Grab the value from the text field
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
let textField = alert.textFields![0] as UITextField
self.manualBP = textField.text!
if(textField.text != "" && (textField.text?.characters.count)! > 10 && self.BPnoData.contains(self.manualBP)){
print("Text field: \(textField.text!)")
//going to attempt to remove the orders that dont match bp number entered
var repcount: Int = 0;
repeat{
if(self.BPnoData[repcount] != self.manualBP) {
self.orderIDData.removeAtIndex(repcount)
self.ItemNoData.removeAtIndex(repcount)
self.BPnoData.removeAtIndex(repcount)
self.QuantityData.removeAtIndex(repcount)
//i = 0;
} else {
repcount++
}
}while (repcount < self.orderIDData.count)
// for (var i = 0; i < self.orderIDData.count + 1; i++ ) {
// if(self.BPnoData[i] != self.manualBP) {
//
// self.orderIDData.removeAtIndex(i)
// self.ItemNoData.removeAtIndex(i)
// self.BPnoData.removeAtIndex(i)
// self.QuantityData.removeAtIndex(i)
//
//
// //i = 0;
// }
// print(i)
//
// }
self.tblview.reloadData()
} else if (textField.text == "") {
alert.title = "No bp number entered!"
alert.message = "Blank entry not allowed!"
self.presentViewController(alert, animated: true, completion: nil)
} else if ((textField.text?.characters.count)! < 6) {
alert.title = "BP number entered is too short!"
alert.message = "Please try again!"
self.presentViewController(alert, animated: true, completion: nil)
}else if ((textField.text?.characters.count)! > 43) {
alert.title = "BP number entered is too long!"
alert.message = "Please try again!"
self.presentViewController(alert, animated: true, completion: nil)
}else if (!self.BPnoData.contains(self.manualBP)) {
alert.title = "BP number entered is not a valid one!"
alert.message = "Please try again!"
self.presentViewController(alert, animated: true, completion: nil)
}
}))
let noAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: nil)
alert.addAction(noAction)
// 4. Present the alert.
self.presentViewController(alert, animated: true, completion: nil)
//})
//alertController.addAction(manEnt)
// let okAction = UIAlertAction(title: "By Scan", style: UIAlertActionStyle.Default, handler: {(alert :UIAlertAction!) in
//
// self.performSegueWithIdentifier("byscan", sender: self)
// })
// alertController.addAction(okAction)
// let noAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: nil)
// alertController.addAction(noAction)
//
// self.presentViewController(alertController, animated: true, completion: nil)
})
let saveAction = UIAlertAction(title: "Clear Filter", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
self.orderIDData.removeAll()
self.ItemNoData.removeAll()
self.BPnoData.removeAll()
self.QuantityData.removeAll()
self.tblview.reloadData()
self.get_data_from_url("http://x.x.x/sfc/orders.php")
})
//
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: {
(alert: UIAlertAction!) -> Void in
print("Cancelled");
})
// 4
optionMenu.addAction(BPAction)
optionMenu.addAction(saveAction)
optionMenu.addAction(cancelAction)
// 5
self.presentViewController(optionMenu, animated: true, completion: nil)
}
@IBOutlet weak var tblview: UITableView!;
var orderIDData:Array< String > = Array < String >()
var ItemNoData:Array< String > = Array < String >()
var BPnoData:Array< String > = Array < String >()
var QuantityData:Array< String > = Array < String >()
var filteredOrder = [orderitem]()
override func viewDidLoad() {
super.viewDidLoad()
get_data_from_url("http://x.x.x/sfc/orders.php")
tblview.tableFooterView = UIView(frame:CGRectZero)
tblview.backgroundColor = .clearColor()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return orderIDData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! OrderViewCell
//print(indexPath.row)
cell.orderLabel.text = orderIDData[indexPath.row]
cell.lblitem.text = ItemNoData[indexPath.row]
cell.lblbp.text = BPnoData[indexPath.row]
cell.lblquantity.text = QuantityData[indexPath.row]
//cell.backgroundColor = UIColor.clearColor()
cell.setTransparent()
return cell
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
deleteOrderIndexPath = indexPath
let OrderToDelete = orderIDData[indexPath.row]
confirmDelete(OrderToDelete)
}
}
// Delete Confirmation and Handling
func confirmDelete(planet: String) {
let alert = UIAlertController(title: "Delete Order", message: "Are you sure you want to permanently delete order \(planet)?", preferredStyle: .ActionSheet)
let DeleteAction = UIAlertAction(title: "Delete", style: .Destructive, handler: handleDeletePlanet)
let CancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: cancelDeleteOrder)
alert.addAction(DeleteAction)
alert.addAction(CancelAction)
self.presentViewController(alert, animated: true, completion: nil)
}
func handleDeletePlanet(alertAction: UIAlertAction!) -> Void {
if let indexPath = deleteOrderIndexPath {
tblview.beginUpdates()
let OrderNo = orderIDData[indexPath.row];
let myUrl = NSURL(string: "http://x.x.x/sfc/deleteorder.php");let request = NSMutableURLRequest(URL:myUrl!);
request.HTTPMethod = "POST";
// Compose a query string
let postString = "OrderNo=\(OrderNo)";
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
if error != nil
{
print("error=\(error)")
return
}
// You can print out response object
print("response = \(response)")
// Print out response body
let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("responseString = \(responseString)")
//Let’s convert response sent from a server side script to a NSDictionary object:
//var err: NSError?
let myJSON = try! NSJSONSerialization.JSONObjectWithData(data!, options: .MutableLeaves) as? NSDictionary
if let parseJSON = myJSON {
let resultValue = parseJSON["status"] as? String!;
print("result: \(resultValue)");
var isOrderDeleted:Bool = false;
if (resultValue == "Success") {isOrderDeleted = true;}
var DisplayMessage: String = parseJSON["message"] as! String!;
if (!isOrderDeleted) {
DisplayMessage = parseJSON["message"] as! String!
}
dispatch_async(dispatch_get_main_queue(), {
let alerting = UIAlertController(title:"Alert", message:DisplayMessage, preferredStyle: UIAlertControllerStyle.Alert);
let ok = UIAlertAction(title: "Ok", style:UIAlertActionStyle.Default, handler: nil)
alerting.addAction(ok);
self.presentViewController(alerting, animated: true, completion: nil)
});
}
}
task.resume()
orderIDData.removeAtIndex(indexPath.row)
ItemNoData.removeAtIndex(indexPath.row)
BPnoData.removeAtIndex(indexPath.row)
QuantityData.removeAtIndex(indexPath.row)
// Note that indexPath is wrapped in an array: [indexPath]
tblview.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
deleteOrderIndexPath = nil
tblview.endUpdates()
}
}
func cancelDeleteOrder(alertAction: UIAlertAction!) {
deleteOrderIndexPath = nil
}
func get_data_from_url(url:String)
{
// let httpMethod = "GET"
//
// let url = NSURL(string: url)
// let urlRequest = NSMutableURLRequest(URL: url!,
// cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData,
// timeoutInterval: 15.0)
// let queue = NSOperationQueue()
// NSURLConnection.sendAsynchronousRequest(
// urlRequest,
// queue: queue,
// completionHandler: {(response: NSURLResponse?,
// data: NSData?,
// error: NSError?) in
// if data!.length > 0 && error == nil{
// let json = NSString(data: data!, encoding: NSASCIIStringEncoding)
// self.extract_json(json!)
// }else if data!.length == 0 && error == nil{
// print("Nothing was downloaded")
// } else if error != nil{
// print("Error happened = \(error)")
// }
// }
// )
let url : NSURL = NSURL(string: url)!
let request: NSURLRequest = NSURLRequest(URL: url)
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)
let task : NSURLSessionDataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
let json = NSString(data: data!, encoding: NSASCIIStringEncoding)
self.extract_json(json!)
});
task.resume()
}
func extract_json(data:NSString)
{
//let parseError: NSError?
let jsonData:NSData = data.dataUsingEncoding(NSASCIIStringEncoding)!
let json: AnyObject? = try! NSJSONSerialization.JSONObjectWithData(jsonData, options: .MutableContainers)
if let orders_list = json as? NSArray
{
for (var i = 0; i < orders_list.count ; i++ )
{
if let orders_obj = orders_list[i] as? NSDictionary
{
if let order_id = orders_obj["OrderID"] as? String
{
if let order_ItemNo = orders_obj["ItemNo"] as? String
{
if let order_bpNo = orders_obj["BPno"] as? String
{
if let order_quantity = orders_obj["Quantity"] as? String
{
//TableData.append(order_id + " [" + order_ItemNo + "]")
orderIDData.append(order_id)
ItemNoData.append(order_ItemNo)
BPnoData.append(order_bpNo)
QuantityData.append(order_quantity)
}
}
}
}
}
}
}
do_table_refresh();
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.tblview.reloadData()
return
})
}
/*
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the item to be re-orderable.
return true
}
*/
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
}
以下是Tom Elliot提供的精彩教程的链接：
https://www.raywenderlich.com/157864/uisearchcontroller-tutorial-getting-started