我正在 swift 3.0 中开发一个项目，我有 UIViewController 来填充一些文本字段。因此，我使用表视图作为下拉菜单，一旦选择一行，它将被分配给 UILabel。此外，我还添加了 UITapGuestureRecognizer 方法，以确保点击屏幕后键盘会隐藏。不幸的是，由于这种方法，我的 didSelectRow 不起作用，事实上，一旦点击一行，名称就不会分配给 UILable。但是当我消除 UITapGusture 方法时，它工作得很好。我该如何解决这个问题？代码如下。
import UIKit
import CoreData
class AddRecurringExpensesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak var selectCategoryLabel: UILabel!
@IBOutlet weak var expenseNameTextField: UITextField!
@IBOutlet weak var amountTextField: UITextField!
@IBOutlet weak var toTextField: UITextField!
@IBOutlet weak var fromTextField: UITextField!
@IBOutlet weak var recurringexpenseTypeTableView: UITableView!
@IBOutlet weak var fromDatePicker: UIDatePicker!
@IBOutlet weak var fromDatePickerView: UIView!
@IBOutlet weak var toDatePickerView: UIView!
@IBOutlet weak var toDatePicker: UIDatePicker!
var selectCategoryArray = ["Entertainment", "Food", "Membership", "Misc", "Purchase", "Subscription", "Transport", "Utility", "Other"]
override func viewDidLoad() {
super.viewDidLoad()
self.fromDatePickerView.isHidden = true
self.toDatePickerView.isHidden = true
self.recurringexpenseTypeTableView.isHidden = true
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(AddRecurringExpensesViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return selectCategoryArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell ()
cell.textLabel?.text = selectCategoryArray[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.selectCategoryLabel.text = selectCategoryArray[indexPath.row]
print("selected row is \(selectCategoryLabel.text)")
self.recurringexpenseTypeTableView.isHidden = true
}
@IBAction func selectCategoryButtonPressed(_ sender: AnyObject) {
self.recurringexpenseTypeTableView.isHidden = false
}
@IBAction func fromDateButtonPressed(_ sender: AnyObject) {
self.fromDatePickerView.isHidden = false
}
@IBAction func fromDateAddedButtonPressed(_ sender: AnyObject) {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd MMM yyyy"
fromTextField.text = dateFormatter.string(from:fromDatePicker.date)
self.fromDatePickerView.isHidden = true
}
@IBAction func toDateButtonPressed(_ sender: AnyObject) {
self.toDatePickerView.isHidden = false
}
@IBAction func toDateAddedButtonPressed(_ sender: AnyObject) {
let dateFormatter = DateFormatter ()
dateFormatter.dateFormat = "dd MMM yyyy"
toTextField.text = dateFormatter.string(from: toDatePicker.date)
self.toDatePickerView.isHidden = true
}
你是对的，DidSelectRow方法会因为tapGestureRecognizer而被禁用。
你可以尝试在'touchsbegin'中执行'view.endEditing(true)'，记得重写super func。当UITableview存在时不要使用tapGestureRecognizer。
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
view.endEditing(true)
}
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