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我一直在研究Swift教程。 在本教程中,作者忽略瞭解釋如何關閉模擬器上的鍵盤。 我嘗試了我所知道的標準方法; resignFirstResponder() 但是我不斷收到一個錯誤;不能將字符串轉換爲布爾值。 我一直無法找到堆棧溢出日期可行的答案。 任何想法? 我已經包含下面的代碼。Swift代碼;無法使用標準方法解除小鍵盤
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var yearTextField: UITextField!
@IBOutlet weak var dayTextField: UITextField!
@IBOutlet weak var monthTextField: UITextField!
@IBOutlet weak var messageLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.yearTextField.delegate = self
self.dayTextField.delegate = self
self.monthTextField.delegate = self
}
// Suggested fix not working?
// func textFieldShouldReturn(textField: UITextField!) -> Bool {
// textField.resignFirstResponder()
// return true;
// }
@IBAction func daysButtonPressed(sender: AnyObject) {
println("Days Button Pressed")
messageLabel.text = "Button pressed"
messageLabel.resignFirstResponder()
var dateComponents = NSDateComponents()
dateComponents.day = dayTextField.text.toInt()! // 28
dateComponents.month = monthTextField.text.toInt()! // 3
dateComponents.year = yearTextField.text.toInt()! // 1956
var calendar = NSCalendar(identifier: NSGregorianCalendar)
var birthDate = calendar.dateFromComponents(dateComponents) //NSDate
var currentDate = NSDate.date()
println(birthDate)
println("Current Date \(currentDate)")
var durationDateComponets = calendar.components(NSCalendarUnit.CalendarUnitDay,
fromDate: birthDate!,
toDate: currentDate,
options: nil)
var numberOfDaysAlive = durationDateComponets.day
//Format with commas
var numberFormatter = NSNumberFormatter()
numberFormatter.usesGroupingSeparator = true
var dayString = numberFormatter.stringFromNumber(numberOfDaysAlive)
messageLabel.text = "Days alive: \(dayString)"
// self.messageLabel.resignFirstResponder()
}
}
感謝,它的偉大工程! – 2014-10-01 23:02:55
歡迎來到Stack Overflow。請點擊答案旁邊的複選標記,接受我的答案。 – vacawama 2014-10-01 23:16:05