我需要在tableview中搜索。我有tableview和textfield.While点击文本字段，它必须搜索tableview。
我的模特： -
class SearchModel: NSObject {
var restaurantname :String!
init?(dictionary :JSONDictionary) {
guard let name = dictionary["name"] as? String else {
return
}
self.restaurantname = name
}
}
我的viewmodel： -
class SearchViewModel: NSObject {
var datasourceModel:SearchDataSourceModel
init(withdatasource newDatasourceModel: SearchDataSourceModel) {
datasourceModel = newDatasourceModel
}
func datafordisplay(atindex indexPath: IndexPath) -> SearchModel{
return datasourceModel.dataListArray![indexPath.row]
}
func numberOfRowsInSection(section:Int) -> Int {
return (datasourceModel.dataListArray?.count)!
}
func loadData(completion :@escaping (_ isSucess:Bool) -> ()){
loadFromWebserviceData { (newDataSourceModel) in
if(newDataSourceModel != nil)
{
self.datasourceModel = newDataSourceModel!
completion(true)
}
else{
completion(false)
}
}
}
//}
func loadFromWebserviceData(completion :@escaping (SearchDataSourceModel?) -> ()){
//with using Alamofire ..............
Alamofire.request("http://www.example.com").validate(statusCode: 200..<300).validate(contentType: ["application/json"]).responseJSON{ response in
switch response.result{
case .success(let data):
print("success",data)
let result = response.result
if let wholedata = result.value as? [String:Any]{
if let data = wholedata["data"] as? Array<[String:Any]>{
// print(data["name"] as! String)
print(data)
print(response)
let newDataSource:SearchDataSourceModel = SearchDataSourceModel(array: data)
completion(newDataSource)
// }
}
}
// case .failure(let data):
// print("fail",data)
case .failure(let encodingError ):
print(encodingError)
// if response.response?.statusCode == 404{
print(encodingError.localizedDescription)
completion(nil)
// }
}
}}
}
我的数据源模型： -
class SearchDataSourceModel: NSObject {
var dataListArray:Array<SearchModel>? = []
init(array :Array<[String:Any]>?) {
super.init()
var newArray:Array<[String:Any]> = []
if array == nil{
// newArray = self.getJsonDataStored44()
}
else{
newArray = array!
}
var datalist:Array<SearchModel> = []
for dict in newArray{
let model = SearchModel(dictionary: dict)
datalist.append(model!)
}
self.dataListArray = datalist
}
}
我的viewcontroller： -
class SearchViewController: UIViewController,UITableViewDelegate,UITableViewDataSource, UISearchBarDelegate,UITextFieldDelegate {
@IBOutlet private weak var tableView: UITableView!
!
@IBOutlet weak var txt: UITextField!
var filteredSearchArray = NSMutableArray()
private var searchViewModel :SearchViewModel!
init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?, withViewModel viewModel:SearchViewModel) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
searchViewModel = viewModel
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
var filteredData: [String]!
override func viewDidLoad() {
super.viewDidLoad()
txt.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControlEvents.editingChanged)
searchViewModel.loadData { (isSuccess) in
if(isSuccess == true)
{
self.tableView .reloadData()
}
else{
}
}
}
@objc private func textFieldDidChange(textField: UITextField) {
if textField.text == "" {
self .viewDidLoad()
}else{
filterContentForSearchText(searchText: textField.text!)
}
}
func filterContentForSearchText(searchText: String) {
filteredSearchArray = NSMutableArray(array:(searchViewModel.datasourceModel.dataListArray?.filter({(ele:AnyObject) -> Bool in
return (ele as! SearchModel).restaurantname.lowercased().contains(searchText.lowercased())
}))!)
tableView.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return searchViewModel.numberOfRowsInSection(section: section)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identifier = "searchcell"
var cell: SearchCell! = tableView.dequeueReusableCell(withIdentifier: identifier) as? SearchCell
if cell == nil {
tableView.register(UINib(nibName: "SearchCell", bundle: nil), forCellReuseIdentifier: identifier)
cell = tableView.dequeueReusableCell(withIdentifier: identifier) as?SearchCell
}
cell.setsearchData(search: searchViewModel.datafordisplay(atindex: indexPath))
return cell
}
}
我的tableviewcell： -
class SearchCell: UITableViewCell {
@IBOutlet weak var name: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func setsearchData(search:SearchModel)
{
self.name.text = search.restaurantname
}
}
这是我的代码，但在filteredSearchArray中始终显示为0元素。
此处显示名称列表，但单击未搜索且未重新加载的文本字段。如何解决问题。
此代码中没有数据： -
func filterContentForSearchText(searchText: String) {
filteredSearchArray = NSMutableArray(array:(searchViewModel.datasourceModel.dataListArray?.filter({(ele:AnyObject) -> Bool in
return (ele as! SearchModel).restaurantname.lowercased().contains(searchText.lowercased())
}))!)
tableView.reloadData()
}
答案 0 :(得分：0)
首先，一件重要的事情不要在NSArray使用NSDictionary，swift而使用Array，Dictionary。
我在你的模型类中进行了更改：
class SearchModel: NSObject {
var restaurantname :String!
init(dictionary :JSONDictionary) {
self.restaurantname = dictionary["name"] as? String ?? ""
}
}
现在过滤你的数组：
filteredSearchArray = searchViewModel.datasourceModel.dataListArray?.filter {$0.restaurantname.lowercased().contains(searchText.lowercased())}
现在在filteredSearchArray数据源中传递tableView，然后重新加载表格。您可以使用bool变量isSearching来检查您必须在数据源中传递哪个数组，过滤后的原始数据。在isSearching和textFieldDidBeginEiditng方法中切换textFieldDidEndEiditng。
我在我的操场上通过以下示例对其进行了测试：
var models: Array<SearchModel> = [SearchModel.init(dictionary: ["name": "Khalsa Dhaba"]), SearchModel.init(dictionary: ["name": "Yo! China"]), SearchModel.init(dictionary: ["name": "Sher-e-punjab"]), SearchModel.init(dictionary: ["name": "Haveli"])]
let result = models.filter {$0.restaurantname.lowercased().contains("o!".lowercased())}
print(result)
工作正常！
其次，我注意到你正在通过调用self.viewDidLoad()方法来重新加载你的视图，你不应该调用它来调用它本身，它是viewContoller生命周期的函数。请改为呼叫tableView.reloadData()。