我需要一些帮助来从栏按钮中提取自定义警报。目的是弹出警报,要求用户输入标题和描述。该警报将有两个文本字段,一个用于标题,一个用于详细信息,并带有“创建”和“取消”按钮。
代码如下,但我在 Xcode 7.0.1 中遇到两个相同的错误:
无法调用非函数类型“[UITextField]”的值
此错误发生在这些行上:
let itemTitle = alert.textFields!(0) as UITextField!
let itemDetail = alert.textFields!(1) as UITextField!
完整代码:
@IBAction func addNewToDoListItem(sender: UIBarButtonItem) {
var alert = UIAlertController(title: "New ToDo Item", message: "Please enter a title and details for the new ToDo list item", preferredStyle: UIAlertControllerStyle.Alert)
var createItemAction = UIAlertAction(title: "Create", style: UIAlertActionStyle.Default) { (alertAction) -> Void in
let itemTitle = alert.textFields!(0) as UITextField!
let itemDetail = alert.textFields!(1) as UITextField!
}
var createCancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
alert.addTextFieldWithConfigurationHandler { (textField) ->
Void in
textField.placeholder = "Title"
}
alert.addTextFieldWithConfigurationHandler { (textField) ->
Void in
textField.placeholder = "Details"
}
alert.addAction(createItemAction)
alert.addAction(createCancelAction)
self.presentViewController(alert, animated: true, completion: nil)
最佳答案
尝试在此处使用方括号而不是圆括号:
alert.textFields![0]
关于Xcode7 UIAlertController 获取用户数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33177790/