Swift Fatal Error index out of range while using searchbar in tableview - swift

Question

i try to load an json data with tableView and i wanna add search data using uiSearchBar, data is search well but when i try to hit 'x' button on the searchBar or when i try to backspace the input it crash...Any help guys? or should i change my search method? thanks for the help. I'm still new in swift so if theres a better method to search please let me know:)
struct ProjectSumName: Decodable {
let id : Int
let name : String
enum CodingKeys : String, CodingKey {
case id = "id"
case name = "name"
}
}
class ProjectSumController: UIViewController {
#IBOutlet weak var SearchBar: UISearchBar!
#IBOutlet weak var ProjectSumTableView: UITableView!
var projectSum = [ProjectSumName]()
var filterProject : [ProjectSumName] = [ProjectSumName]()
var isSearch : Bool = false
override func viewDidLoad() {
super.viewDidLoad()
SearchBar.delegate = self
Loading()
let jsonUrl = "http://\(GlobalVariable.ip):7000/api/projectApi?UserId=\(GlobalVariable.UserIdProjectSum)"
guard let url = URL(string: jsonUrl) else { return }
URLSession.shared.dataTask(with: url) { (data, response, error) in
guard let data = data else { return }
do{
let projectsum = try JSONDecoder().decode([ProjectSumName].self, from: data)
self.projectSum = projectsum
self.filterProject = projectsum
DispatchQueue.main.async {
SVProgressHUD.dismiss()
self.ProjectSumTableView.reloadData()
}
}catch {
print(error)
}
}.resume()
}
}
extension ProjectSumController : UISearchBarDelegate, UITableViewDelegate,UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isSearch{
return filterProject.count
}else{
return projectSum.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let proc = projectSum[indexPath.row]
let proc1 = filterProject[indexPath.row]
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as? ProjectSumTableCell else {return UITableViewCell()}
if isSearch{
cell.NameLbl.text = proc1.name
}else{
cell.NameLbl.text = proc.name
}
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let sum = projectSum[indexPath.row]
let sum1 = filterProject[indexPath.row]
if isSearch{
performSegue(withIdentifier: "Segue", sender: sum1)
let projectIDs = sum1.id
GlobalVariable.ProjectId = String(projectIDs)
}else{
performSegue(withIdentifier: "Segue", sender: sum)
let projectID = sum.id
GlobalVariable.ProjectId = String(projectID)
}
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if searchText.isEmpty{
self.isSearch = false;
self.ProjectSumTableView.reloadData()
} else {
self.filterProject = self.projectSum.filter({ (ProjectSumName) -> Bool in
let tmp : NSString = NSString.init(string: ProjectSumName.name)
let range = tmp.range(of: searchText, options: NSString.CompareOptions.caseInsensitive)
return range.location != NSNotFound && range.location == 0
})
if(self.filterProject.count == 0){
self.isSearch = false;
}else{
self.isSearch = true;
}
self.ProjectSumTableView.reloadData()
}
}
"Fatal error: Index out of range
2019-06-27 09:43:46.167472+0700 ImmobiTracker[806:30114] Fatal error: Index out of range"
that crash come up everything i try to clear my searchbar...so when i try to type the first time to search its filtering the data, but when i try to clear the search bar it pop crash

Answer 1

There are two places where you are getting this error.
in cellForRowAt:
let proc = projectSum[indexPath.row]
let proc1 = filterProject[indexPath.row]
didSelectRowAt
let sum = projectSum[indexPath.row]
let sum1 = filterProject[indexPath.row]
Why:
You are trying to get an element from filterProject without using isSearch i.e. filterPoject array is empty. When isSearch is false then the error occurs because you are trying to get the element from the empty array.
How to Solve this:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let sum: ProjectSumName
if isSearch{
sum = filterProject[indexPath.row]
}else{
sum = projectSum[indexPath.row]
}
GlobalVariable.ProjectId = String(sum.id)
performSegue(withIdentifier: "Segue", sender: sum)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as? ProjectSumTableCell else {return UITableViewCell()}
let proc: ProjectSumName
if isSearch{
proc = filterProject[indexPath.row]
}else{
proc = projectSum[indexPath.row]
}
cell.NameLbl.text = proc.name
return cell
}