我试图呼叫一个具有文本字段的警报控制器.但是我想立即显示数字键盘,因为用户只能输入数字.
我尝试了以下,但它不工作.
我尝试了以下,但它不工作.
let alert = UIAlertController(title: "New rating",message: "Rate this!",preferredStyle: UIAlertControllerStyle.Alert)
let cancelAction = UIAlertAction(title: "Cancel",style: .Default,handler: { (action: UIAlertAction!) in })
let saveAction = UIAlertAction(title: "Save",handler: { (action: UIAlertAction!) in
let textField = alert.textFields![0] as UITextField
textField.keyboardType = UIKeyboardType.NumberPad
self.updaterating(textField.text)
})
alert.addTextFieldWithConfigurationHandler { (textField: UITextField!) in }
alert.addAction(cancelAction)
alert.addAction(saveAction)
self.presentViewController(alert,animated: true,completion: nil)
解决方法
发现自己！这可能对别人有用.
alert.addTextField(configurationHandler: { textField in
textField.keyboardType = .numberPad
})