UIDatepicker中的日期无法正常显示

我有UIDatepicker。我几乎没有问题要问

1.）当我点击UIButton时，datepicker中的日期会返回到最小值，因为我已经给出了最大值和最小值。 在执行该function时，datepicker中的日期似乎是非突出显示的方式！[在此处输入图像描述。 下面提到的链接显示了日期在datepicker中的显示方式

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

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(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]; } }