iphone - 将 TextField 添加到 AlertController 会破坏 AlertController

Question

我目前正在尝试打开一个包含 TextField 的 AlertController。运行时

let configAlert = UIAlertController(title: "Configure Add-On", message: "Enter Your Add-On Name:", preferredStyle: UIAlertControllerStyle.alert)

configAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action: UIAlertAction!) in
      // Handle Input          
}))

present(configAlert, animated: true, completion: nil)

一切正常，但是一旦我添加 TextField

configAlert.addTextField { (textField) in
    textField.placeholder = "Name"
}

警报需要大约 10 倍的时间才能打开，然后立即关闭，并且我在控制台中收到此错误垃圾邮件大约 30 次:

2017-11-26 13:04:08.985783-0500 MinelyMod[380:14792] Warning: Attempt to dismiss from view controller <UISplitViewController: 0x147e0a6a0> while a presentation or dismiss is in progress!

这是已完成的 AlertController，但失败了

let configAlert = UIAlertController(title: "Configure Add-On", message: "Enter Your Add-On Name:", preferredStyle: UIAlertControllerStyle.alert)

configAlert.addTextField { (textField) in
    textField.placeholder = "Name"
}

configAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action: UIAlertAction!) in
    // Handle Input            
}))

present(configAlert, animated: true, completion: nil)

Answer 1

let alertController = UIAlertController(title: "Title", message: "", preferredStyle: .alert)

    alertController.addAction(UIAlertAction(title: "Save", style: .default, handler: {
        alert -> Void in
        let textField = alertController.textFields![0] as UITextField
        // do something with textField
    }))
    alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

    alertController.addTextField(configurationHandler: {(textField : UITextField!) -> Void in
        textField.placeholder = "Search"
    })

    self.present(alertController, animated: true, completion: nil)