我有一个带有UIDatePicker
的项目。
我想要如果我更改UIDatePicker
值,例如在9:23,当我重新启动时,我的应用程序值仍然是9:23,而不是默认值。我怎样才能做到这一点?
这是我的代码:
@IBOutlet var myDatePicker: UIDatePicker!
var datePicker = /* Get Your Date Picker from somewhere */
// Store value using User Defaults
let currentDate = datePicker.date
NSUserDefaults.standardUserDefaults().setObject(currentDate, forKey: "Current-Date")
// Retrieve Value using User Defaults
if let date = NSUserDefaults.standardUserDefaults().objectForKey("Current- Date") as? NSDate {
datePicker.setDate(date, animated: true)
}
我尝试使用标准
userDefaults
方法,但没有用。 最佳答案
嗨,我为您准备了一些片段代码:
import UIKit
class ViewController: UIViewController {
// I have declared const key property to avoid mistakes (typo)
let dateKey = "Current-Date"
@IBOutlet weak var datePicker: UIDatePicker!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
// This line load previous state when view controller did appear
loadDate(true)
}
@IBAction func savePickerData(sender: AnyObject) {
// When user taps into 'savePickerData' button picker state is saved
saveDate()
}
func saveDate() {
NSUserDefaults.standardUserDefaults().setObject(datePicker.date, forKey:dateKey)
}
func loadDate(animation: Bool) {
guard let loadedDate = NSUserDefaults.standardUserDefaults().objectForKey(dateKey) as? NSDate else { return }
datePicker.setDate(loadedDate, animated: animation)
}
}
应该工作正常:)
关于ios - 保存最后日期选择器选择,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/34277619/