在UIDatePickerr视图

Question

如果我从日期选择器视图中选择日期作为当前日期，时间也会被选中并显示当前时间，我想在两个不同的选择事件中分开

这是我的代码段 -

/ *用于显示UIDatePicker视图的按钮* /

-(void) dueDateChanged:(UIDatePicker *)sender {

    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd MMM, yyyy"];


    self.lbl_StartDateValue.text = [dateFormatter stringFromDate:[sender date]];
    self.planStartDate = [dateFormatter stringFromDate:[sender date]];

    NSDate *date = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponents toDate:[dateFormatter dateFromString:[dateFormatter stringFromDate:[sender date]]] options:0];

    self.lbl_EndDateValue.text = [NSString stringWithFormat:@"End %@",[dateFormatter stringFromDate:date]];
    self.planEndDate = [dateFormatter stringFromDate:date];
}

// Here I am not able to differentiate the selection of two picker view


-(void)onDoneButtonClick {

    [self dueDateChanged:self.picker];
    [self dueTimeChanged:self.picker];
    [self.toolbar removeFromSuperview];
    [self.picker removeFromSuperview];
    [self.tempBackgroundView removeFromSuperview];
}

-(void) dueTimeChanged:(UIDatePicker *)sender {

    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"hh:mm a"];

    self.lbl_timeValue.text = [dateFormatter stringFromDate:[sender date]];
    self.planAlarmtime = [dateFormatter stringFromDate:[sender date]];
}

Answer 1

只需将最低数据设为当前日期

[self.picker setMinimumDate:[NSDate date]];

在滚动Picker

之前，您也不会选择

如果要将默认日期显示为当前日期

self.picker.date = [NSDate date]

Answer 2

这样，当用户出现日期选择器时，最初会在文本字段中设置当前日期

  (IBAction)btn_calendar_event:(id)sender {
   ......
 [self.toolbar sizeToFit];
[self.view addSubview:self.toolbar];
//if you want to show the default date as current date 

self.picker.date = [NSDate date];
 // set inital date on your textfield
[self dueDateChanged :  self.picker];
 }

如果用户按下完成按钮，则调用此

-(void)onDoneButtonClick { 
 // call the method
[self dueDateChanged :  self.picker];
[self.toolbar removeFromSuperview]; 
[self.picker removeFromSuperview]; 
  [_txtf_birthDate resignFirstResponder];
} 

最后更改YYYY格式

-(void) dueDateChanged:(UIDatePicker *)sender {

    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];


    NSLog(@"Picked the date %@", [dateFormatter stringFromDate:[sender date]]);
    _txtf_birthDate.text = [dateFormatter stringFromDate:[sender date]];

}

Answer 3

这是UIDatepicker alloca的代码并设置当前日期

UIDatePicker *datepicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height-320, self.view.frame.size.width, 320)];
datepicker.date = [NSDate date];
[self.view addSubview:datepicker];