我的自定义导航栏中有一个菜单表格 View 。如果我单击一个单元格，它应该将我带到另一个 View Controller 。但是当我点击它时我的应用程序崩溃了。
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return menu_items.count //It has 5 values
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: UITableViewCellStyle.value1, reuseIdentifier: "cell")
cell.textLabel?.text = menu_items[indexPath.row]
cell.textLabel?.textColor = .white
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = menu_items[indexPath.row]
if (item == "Patienten") {
tableView.removeFromSuperview()
let vc = self.storyboard?.instantiateViewController(withIdentifier: "patientView") as! patientViewVC //App crashes here
self.present(vc, animated: false, completion: nil)
} else if (item == "Mitarbeiter") {
} else if (item == "Kalender") {
} else if (item == "Tourenplanung") {
tableView.removeFromSuperview()
let vc = storyboard?.instantiateViewController(withIdentifier: "tour") as! tourVC //App crashes here
self.present(vc, animated: false, completion: nil)
}else if (item == "Abmelden") {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "loginvc") as! LoginVC //App crashes here
self.present(vc, animated: false, completion: nil)
}
let selectedCell:UITableViewCell = tableView.cellForRow(at: indexPath)!
selectedCell.contentView.backgroundColor = colorLightGreen
}
}
我已经多次验证所有标识符名称和 View Controller 名称是否正确。
最佳答案
确保在实例化 viewController 之前加载正确的 Storyboard。
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = menu_items[indexPath.row]
if (item == "Patienten") {
tableView.removeFromSuperview()
let storyBoard = UIStoryboard(name: "StoryboardName", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "patientView") as! patientViewVC
self.present(vc, animated: false, completion: nil)
} else if (item == "Mitarbeiter") {
} else if (item == "Kalender") {
} else if (item == "Tourenplanung") {
tableView.removeFromSuperview()
let storyBoard = UIStoryboard(name: "StoryboardName", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "tour") as! tourVC //App crashes here
self.present(vc, animated: false, completion: nil)
}else if (item == "Abmelden") {
let storyBoard = UIStoryboard(name: "StoryboardName", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "loginvc") as! LoginVC //App crashes here
self.present(vc, animated: false, completion: nil)
}
let selectedCell:UITableViewCell = tableView.cellForRow(at: indexPath)!
selectedCell.contentView.backgroundColor = colorLightGreen
}
上面的StoryboardName是包含病人ViewVC、tourVC、LoginVC的 Storyboard的名称
关于ios - Storyboard？.instantiateViewController(withIdentifier : "") as! viewcontroller，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46295943/