如何设置每次在UIDatepicker中显示为默认值的最短时间

5 回答

• 2

  datePickerObj = [[UIDatePicker alloc] initWithFrame:CGRectMake(10, 100, 300, 160)];
  datePickerObj.datePickerMode = UIDatePickerModeTime;
  datePickerObj.backgroundColor = [UIColor clearColor];
  [datePickerObj addTarget:self action:@selector(onDatePickerValueChanged:) forControlEvents:UIControlEventValueChanged];
  

  将String传递给方法和格式到日期......

  -(void)Set_MinimumDate_ToDatePicker:(NSString*)Time //  "start_time" = "3:00PM";
  {
      NSDateFormatter *dformat = [[NSDateFormatter alloc]init];
      [dformat setDateFormat:@"hh:mma"];
  
      [datePickerObj setMinimumDate:[dformat dateFromString:Time]];
      [datePickerObj setDate:[dformat dateFromString:Time] animated:YES];
      [datePickerObj reloadInputViews];
  }
  

  在更改Picker时，它会将时间转换为UTC 00:00，但它会显示您的时区的时间，例如 . 印度，它将UTC 05:30添加到时间 . 如果任何TimeZone问题将TimeZone设置为 NSDateFormatter .

  -(void)onDatePickerValueChanged:(UIDatePicker *)datePicker
  {
      NSDateFormatter *dformat = [[NSDateFormatter alloc]init];
      [dformat setDateFormat:@"hh:mm a"];
  
      NSLog(@"%@",datePicker.date); //  2000-01-01 11:30:00 +0000
      [newStartBtn setTitle:[dformat stringFromDate:datePicker.date] forState:UIControlStateNormal]; 
      //"05:00 PM";
   }
  

  回复于 2024-04-28T00:20:28+08:00
• 1

  更新了Swift 3：

  let startHour: Int = 6
          let endHour: Int = 23
          let date1: NSDate = NSDate()
          let gregorian: NSCalendar = NSCalendar(calendarIdentifier: NSCalendar.Identifier.gregorian)!
  
          let components: NSDateComponents = gregorian.components(([.day, .month, .year]), from: date1 as Date) as NSDateComponents
          components.hour = startHour
          components.minute = 0
          components.second = 0
          let startDate: NSDate = gregorian.date(from: components as DateComponents)! as NSDate
  
          components.hour = endHour
          components.minute = 0
          components.second = 0
          let endDate: NSDate = gregorian.date(from: components as DateComponents)! as NSDate
  
          timePicker.datePickerMode = .time
          timePicker.minimumDate = startDate as Date
          timePicker.maximumDate = endDate as Date
          timePicker.setDate(startDate as Date, animated: true)
          timePicker.reloadInputViews()
          timePicker.frame = CGRect(x: 0.0, y: (self.view.frame.height/2 + 60), width: self.view.frame.width, height: 150.0)
          timePicker.backgroundColor = UIColor.white
  //        timePicker.reloadInputViews()
          self.view.addSubview(timePicker)
          timePicker.addTarget(self, action: #selector(RoundTripViewController.startTimeDiveChanged), for: UIControlEvents.valueChanged)
  

  回复于 2024-04-28T00:20:28+08:00
• 3

  编辑：

  int startHour = 7;
  int endHour = 11;
  
  NSDate *date1 = [NSDate date];
  NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar];
  NSDateComponents *components = [gregorian components: NSUIntegerMax fromDate: date1];
  [components setHour: startHour];
  [components setMinute: 0];
  [components setSecond: 0];
  NSDate *startDate = [gregorian dateFromComponents: components];
  
  [components setHour: endHour];
  [components setMinute: 0];
  [components setSecond: 0];
  NSDate *endDate = [gregorian dateFromComponents: components];
  
  [userTimePicker setDatePickerMode:UIDatePickerModeTime];
  [userTimePicker setMinimumDate:startDate];
  [userTimePicker setMaximumDate:endDate];
  [userTimePicker setDate:startDate animated:YES];
  [userTimePicker reloadInputViews];
  

  回复于 2024-04-28T00:20:28+08:00
• 3

  对于Swift版本：

  let startHour: Int = 6
  let endHour: Int = 23
  let date1: NSDate = NSDate()
  let gregorian: NSCalendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
  let components: NSDateComponents = gregorian.components(([.Day, .Month, .Year]), fromDate: date1)
  components.hour = startHour
  components.minute = 0
  components.second = 0
  let startDate: NSDate = gregorian.dateFromComponents(components)!
  components.hour = endHour
  components.minute = 0
  components.second = 0
  let endDate: NSDate = gregorian.dateFromComponents(components)!
  datePicker.datePickerMode = .Time
  datePicker.minimumDate = startDate
  datePicker.maximumDate = endDate
  datePicker.setDate(startDate, animated: true)
  datePicker.reloadInputViews()
  

  回复于 2024-04-28T00:20:28+08:00
• 10

  UIDatePicker类有一个 setDate:animated: 方法，您可以使用该方法将日期设置为日期选择器实例上所需的任何日期/时间 .

  更多信息：http://developer.apple.com/library/ios/documentation/uikit/reference/UIDatePicker_Class/Reference/UIDatePicker.html#//apple_ref/doc/uid/TP40006806-CH3-SW1

  回复于 2024-04-28T00:20:28+08:00