Question

我正在尝试为iOS创建一个闹钟应用程序，我是Swift的新手。我想知道如何从UIDatePicker获得时间。直到现在，我有一个代码，它只给出了整个日期的时间。 `import UIKit

类ViewController：UIViewController {

@IBOutlet weak var alarmTime: UIDatePicker!
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
@IBAction func alarmTime(_ sender: UIDatePicker){
 sender.datePickerMode = UIDatePickerMode.time
    print(sender.date)
}

} ` Here is the screenshot of the output of the above code in the terminal

Answer 1

将日期选择器模式设置如下。

datePicker.datePickerMode = UIDatePickerMode.Time

从日期获取时间：

    let date = Date()

    let calendar = Calendar.current
    let comp = calendar.dateComponents([.hour, .minute], from: date)
    let hour = comp.hour
    let minute = comp.minute

Answer 2

 let datePicker = UIDatePicker()  
  datePicker.datePickerMode = UIDatePickerMode.time
// datePicker.backgroundColor = UIColor.blue
  txtFildDeadLine.textField.inputView = datePicker

根据您的问题，将其放在viewDidLoad
中

alarmTime.datePickerMode = UIDatePickerMode.time

Swift3-如何从UIDatePicker获取时间

2 个答案: