Swift refresh table view - ios

Question

i have a problem,when i called the viewWillAppear ,table view get refreshed,but the data are strange(i insert a new record so i need to refresh the table view every time it appears), for example
original data:a,b,c
insert one record should be:a,b,c,d
result:a,b,c,a(why a?)
Hope someone could help me ,please.
import UIKit
import SQLite
class DetailViewController: UIViewController, UITableViewDelegate,
UITableViewDataSource {
#IBOutlet weak var tableView: UITableView!
let inputDetailTable = Table("input_detail")
var labelOneArray = [String]()
var labelTwoArray = [NSAttributedString]()
var labelThreeArray = [String]()
var labelFourArray = [String]()
let id = Expression<Int>("id")
let deleteFlag = Expression<Int>("delete_flag")
// var selectedDatas :AnySequence<Row>!
let viewService = ViewService()
override func viewDidLoad() {
super.viewDidLoad()
getTableViewData()
}
override func viewWillAppear(_ animated: Bool) {
getTableViewData()
self.tableView.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
let selectedDatas = viewService.selectTableData()
var counter = 0
for _ in selectedDatas{
counter += 1
}
return counter
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell",
for: indexPath) as! DetailTableViewCell
cell.labelOne.attributedText = labelTwoArray[indexPath.row]
cell.labelTwo.text = labelFourArray[indexPath.row]
return cell
}
func getTableViewData() {
let selectedDatas = viewService.selectTableData()
for selectedData in selectedDatas{
var tempAmount = String(selectedData[Expression<Int>
("amount")])
var tempTwoAmout :NSAttributedString?
if selectedData[Expression<Int>("type_flag")] == 0 {
tempAmount = "-"+tempAmount
let text = tempAmount
let nsText = text as NSString
let textRange = NSMakeRange(0, nsText.length)
let myMutableString = NSMutableAttributedString(
string: tempAmount,
attributes: [:])
myMutableString.addAttribute(
NSAttributedStringKey.foregroundColor,
value: UIColor.red,
range: textRange)
tempTwoAmout = myMutableString
} else {
tempAmount = "+"+tempAmount
let text = tempAmount
let nsText = text as NSString
let textRange = NSMakeRange(0, nsText.length)
let myMutableString = NSMutableAttributedString(
string: tempAmount,
attributes: [:])
myMutableString.addAttribute(
NSAttributedStringKey.foregroundColor,
value: UIColor.green,
range: textRange)
tempTwoAmout = myMutableString
}
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd hh:mm:ss"
let createTimeFormat = formatter.string(from:
selectedData[Expression<Date>("create_time")])
self.labelOneArray.append(String(selectedData[Expression<Int>
("id")]))
self.labelTwoArray.append(tempTwoAmout!)
self.labelThreeArray.append(String(selectedData[Expression<String>
("location")]))
self.labelFourArray.append(createTimeFormat)
}
}
}

Answer 1

You are calling twice getTableViewData(), and try to remove all data from your arrays before getting new data.