将视图控制器关闭到上一个视图控制器

Question

我知道很多人可能会问这个问题。我也找到了解决方案，但我无法理解我的代码中有什么问题？

popcontroller.swift:

protocol DataSendDelegate {
    func sendgetattid(pop_att_id: Int, pop_in_time: String)
}
var delegate: DataSendDelegate? = nil

if statuss == "200" {
let send_pop_att_id = att_id
let send_pop_in_time = in_time
self.navigationController?.popViewController(animated: true)
self.dismiss(animated: true) {                                    
self.delegate?.sendgetattid(pop_att_id: send_pop_att_id, pop_in_time: send_pop_in_time)
}
}

在上面的代码中，我得到了正确的值，但它并没有关闭并转到下一个视图控制器。

attendanceViewController.swift:

class attendanceViewController: UIViewController , DataSendDelegate {
func sendgetattid(pop_att_id: Int, pop_in_time: String) {
        DispatchQueue.main.async {
            self.inTimeTextField.text = pop_in_time
            self.get_att_id = pop_att_id
            self.in_time_button.isEnabled = false
            self.out_time_button.isEnabled = true
        }
    }

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if let popVC = segue.destination as? PopUpViewController
        {
            popVC.popEmailID = att_emp_id
            popVC.delegate = self
        }
    }
}

Answer 1

根据您的评论更新： 你没有出席 viewController。你已经推送了一些视图控制器。所以就弹出它。丢弃 dismiss

self.delegate?.sendgetattid(pop_att_id: send_pop_att_id, pop_in_time: send_pop_in_time)
self.navigationController?.popViewController(animated: true)

Answer 2

如果您从之前的 ViewController 中执行了 self.present(ViewController, animated: true, completion: nil) 以显示当前的 viewcontroller，您必须执行

self.dismiss(animated: true) {                                    
      self.delegate?.sendgetattid(pop_att_id: send_pop_att_id, pop_in_time: send_pop_in_time)
}

或者如果你做了 self.navigationController?.pushViewController(ViewController, animated: true) 你必须做 self.navigationController?.popViewController(animated: true)

将视图控制器关闭到上一个视图控制器

Dismiss view controller to previous view controller

ios

swift

swift-protocols