Dates in UIDatepicker not displaying properly

问题

I have UIDatepicker .I have few queries to ask

1.)When i tap on UIButton the dates in datepicker gets retuns to minimum value since i have given maximum and minimum value . In doing that function the date in datepicker appears to be in non highlighted manner ![enter image description here. The link mentioned below shows how the date appears in datepicker

http://postimg.org/image/7mlxiq6sz/

-

(IBAction)notificationButtonChanged:(UIButton *)control
{

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    if (control.tag == 1)
    {
        self.selectedButton = control.tag;

        NSDate *date1  = [defaults objectForKey:@"morningTimeKey"];
        if(!date1) date1 = [NSDate date];

        components = [gregorian components: NSUIntegerMax fromDate:date1];

        [components setHour:12];;
        [components setMinute:00];

        NSDate *startDate = [gregorian dateFromComponents:components];

        [components setHour:14];
        [components setMinute:00];

        NSDate *endDate = [gregorian dateFromComponents:components];

        [userTimePicker setDatePickerMode:UIDatePickerModeTime];

        [userTimePicker setMinimumDate:startDate];
        [userTimePicker setMaximumDate:endDate];

        [userTimePicker setDate:date1 animated:YES];

        [userTimePicker reloadInputViews];
    }

}

来源：https://stackoverflow.com/questions/16819007/dates-in-uidatepicker-not-displaying-properly