我有数据到数据库中，但无法将所有数据加载到表视图中。
“ STUDENTDETAIL”是我的数据库名称，我无法填充表视图。
import UIKit
import FMDB
struct studentInfo {
var name : String
var Rollno : String
var college : String
}
class customtablecell : UITableViewCell{
@IBOutlet weak var lblName: UILabel!
@IBOutlet weak var lblRollno: UILabel!
@IBOutlet weak var lblclg: UILabel!
}
class ShowStudentInTableView: UIViewController {
@IBOutlet weak var tblView: UITableView!
var studentinfo : [studentInfo]!
var databasepath = String()
override func viewDidLoad() {
super.viewDidLoad()
tblView.delegate = self
tblView.dataSource = self
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
}
override func viewWillAppear(_ animated: Bool) {
self.selectdata()
tblView.reloadData()
}
@objc func addTapped(){
let vc = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "AddStudentsDetail") as? AddStudentsDetail
self.navigationController?.pushViewController(vc!, animated: true)
}
func selectdata(){
//open database
let filemanager = FileManager.default
let dirpath = filemanager.urls(for: .documentDirectory, in: .userDomainMask)
databasepath = dirpath[0].appendingPathComponent("STUDENTDETAIL.db").path
if filemanager.fileExists(atPath: databasepath as String){
let studentDB = FMDatabase(path: databasepath as String)
if (studentDB.open()){
let querySQL = "select name, rollno, college from STUDENTDETAIL"
let results:FMResultSet? = studentDB.executeQuery(querySQL,withArgumentsIn: [])
print("our database \(results!)")
if (results?.next())!
{
let student = studentInfo(name: (results?.string(forColumn: "name"))!, Rollno: (results?.string(forColumn: "rollno"))!, college: (results?.string(forColumn: "college"))!)
print("all data \(student)")
if studentinfo == nil
{
studentinfo = [studentInfo]()
}
studentinfo.append(student)
tblView.reloadData()
}
else
{
print("Record not found")
}
studentDB.close()
}
}
else {
print("Error: )")
}
}
}
extension ShowStudentInTableView : UITableViewDelegate , UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return studentinfo.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! customtablecell
let allinfo = studentinfo[indexPath.row]
cell.lblName.text = allinfo.name
cell.lblRollno.text = allinfo.Rollno
cell.lblclg.text = allinfo.college
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 131
}
}