Table view from array index out of range - ios

Question

I'm using an array to read data from a database, Currently I have 8 items in the array. I am trying to make a table where I have a section header. Currently I have 4 sections and I have set that properly and it works. It also works running the first time but when I try to scroll back I get an index out of range. I am using myarray[myindex] to set the cell data for each item and that is not working.
It seems that I need to break up my data into 4 sections that contains only the data for each section to let the table view control it properly. The data can contain any number of sections.
Is there a better way to do this?
I have attached a pic to describe the problem.
Thanks
Adding code on request.
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
print("Returning Sections - > \(sections)")
return sections //seems to work
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
print("Return number of rows in section -> \(noRowsInSection[section])")
return noRowsInSection[section] // seems to work
}
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return sectionHeader[section] // seems to work
}
override func tableView(tableView: UITableView, willDisplayHeaderView view: UIView, forSection section: Int) {
// Format for section Headers
let header:UITableViewHeaderFooterView = view as! UITableViewHeaderFooterView
header.textLabel!.textColor = UIColor.blueColor()
UIColor.blueColor()
header.textLabel!.font = UIFont.boldSystemFontOfSize(12)
header.textLabel!.frame = header.frame
header.textLabel!.textAlignment = NSTextAlignment.Right
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("OurCell", forIndexPath: indexPath) as! OurTableViewCell
print("myindex - > \(myindex) row -> \(indexPath.row)")
cell.OurCellLabel.text = MyHouses[myindex].getAddressDetails() // End configure houses.cell
//cell.OurCellLabel.text = MyHouses[indexPath.row].getAddressDetails() // End configure houses.cell
myindex++ // PROBLEM HERE - GOES OUT OF RANGE
return cell
}
Here I am getting data from the sqlite DB
func GetListOfHousesFromDB() {
let docsDir = dirPaths[0]
let databasePath = docsDir.stringByAppendingString("/newdb.db")
if fileMgr.fileExistsAtPath(databasePath as String) {
let houseDB = FMDatabase(path: databasePath as String)
if houseDB.open() {
var noRows: Int = 0
var sql = "select count(Address) as cnt from Houses" // Define Query
houseDB.executeStatements(sql) // Execute Query
let results:FMResultSet? = houseDB.executeQuery(sql,withArgumentsInArray: nil) //Get results from Query
if results?.next() == true {
let cnt = (results?.stringForColumn("cnt"))! // Retrieve number of rows from DB
noRows = Int(cnt)!
}
var i = 0
sql = "SELECT Address, Street, City, State, Zip from Houses ORDER BY State, City, Street, Address" // Define Query
houseDB.executeStatements(sql) // Execute Query
let results2:FMResultSet? = houseDB.executeQuery(sql,withArgumentsInArray: nil) // Get results from Query
while results2?.next() == true {
MyHouses.append(newhouse())
MyHouses[i].address = (results2?.stringForColumn("Address"))!
MyHouses[i].street = (results2?.stringForColumn("Street"))!
MyHouses[i].city = (results2?.stringForColumn("City"))!
MyHouses[i].state = (results2?.stringForColumn("State"))!
MyHouses[i].zip = (results2?.stringForColumn("Zip"))!
print("Address -> \(i) \(MyHouses[i].getAddressDetails())")
i++
}
}
houseDB.close()
}
}

Answer 1

Based on your other post, what you need is an updated House model and updated data structure for handling data for your table view.
House - Model class
struct House {
var address: String
var street: String
var city: String
var state: String
var zip: String
func getAddressDetails() -> String {
return "\(address) \(street) \(city) \(state) \(zip)"
}
func getCityState() -> String {
return "\(city) - \(state)"
}
}
Helper Class for loading data
class HouseDataHelper {
private static let _sharedInstance = HouseDataHelper()
var myHouses: Dictionary<String, [House]> = [:]
private init() {
loadHouseData()
}
static func sharedInstance() -> HouseDataHelper {
return _sharedInstance
}
private func loadHouseData() {
var houses = [House]()
//Populating your actual values here. GetListOfHousesFromDB()
//Loading dummy data for testing
var sectionHeader = ""
for i in 0...4 {
sectionHeader = "Header \(i)"
houses += [House(address: "Address1", street: "Street1", city: "City1", state: "State1", zip: "Zip1")]
houses += [House(address: "Address2", street: "Street2", city: "City2", state: "State2", zip: "Zip2")]
houses += [House(address: "Address3", street: "Street3", city: "City3", state: "State3", zip: "Zip3")]
houses += [House(address: "Address4", street: "Street4", city: "City4", state: "State4", zip: "Zip4")]
houses += [House(address: "Address5", street: "Street5", city: "City5", state: "State5", zip: "Zip5")]
myHouses.updateValue(houses, forKey: sectionHeader)
houses = []
}
}
}
Table View Controller
class TableViewController: UITableViewController {
var houses = HouseDataHelper.sharedInstance().myHouses
var sectionHeaders: [String] = []
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
sectionHeaders = Array(houses.keys.sort())
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return houses.count
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if let rows = houses[sectionHeaders[section]] {
return rows.count
}
return 0
}
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return sectionHeaders[section]
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//Populate cells based on "houses"
}
}