uidatepicker

问题 I've been struggling with the maximum/minimum date lately, and honestly, I don't know what I'm missing here. I searched a lot and no one seems to complain about it. (I'm not talking about setting a maximum/minimum date as these can only make invalid dates appear gray) Here's what I've done so far: [myDatePicker addTarget:self action:@selector(disableDate) forControlEvents:UIControlEventValueChanged]; Then, on disableDate, I have something like this: if ([myDatePicker.date compare:[NSDate date

问题 I have two UIDatePickers and two UITextField . One UIDatePicker and textField show the begin date + time. The second UIDatePicker and textField shows the end date +time. The problem i'm facing is that i need to connect the two DatePickers so that the end date cannot exceed the begin date + time. Also that there cannot be more than 24hours between the begin and end date + time. What do i need to do in order to achieve this? How do i connect the two UIDatePicker , and prevent the dates + time

问题 I have a single UIDatePicker view which is being used for a number of different date values. An example use case for it failing is: User brings up the date picker and changes the date. User tries to bring up the date picker again and it crashes. If the user opens the date picker, but closes it without changing the date, it's fine, and the user can then open the date picker again. Just before the date picker is opened I run the following code: datePicker.datePickerMode = UIDatePickerModeTime;

问题 i want to get start and end time from date which i select from datepicker. here is my code func handleDatePicker(sender: UIDatePicker) { let dateFormatter = NSDateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss" let startOfDay = NSCalendar.currentCalendar().startOfDayForDate(sender.date) let components = NSDateComponents() components.hour = 23 components.minute = 59 components.second = 59 let endOfDay = NSCalendar.currentCalendar().dateByAddingComponents(components, toDate:

问题 I am using code from Ed Marty's answer for the question here but am having real trouble with a few bits. On the click of a button I have got the datepicker appearing, but the 'done' button however isn't. I am also getting an error from the line: [delegate datePickerController:controller didPickDate:datePicker.date]; Error message: 'controller' undeclared (first use in this function) All in all I have 6 files: ModalDatePickerViewController.m ModalDatePickerViewController.h

问题 I'm working on Preparing UIPickerView with months and year in iOS. Below is my code. in viewdidload : //Array for picker view monthsArray=[[NSMutableArray alloc]initWithObjects:@"Jan",@"Feb",@"Mar",@"Apr",@"May",@"Jun",@"Jul",@"Aug",@"Sep",@"Oct",@"Nov",@"Dec",nil]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"yyyy"]; NSString *yearString = [formatter stringFromDate:[NSDate date]]; yearsArray=[[NSMutableArray alloc]init]; for (int i=0; i<13; i++) {

问题 I have customized UIDatePicker to a level and I am adding it to UIAlertView. but I am getting a black color on the bottom and the top of date picker, how to remove it. I want the date picker to be neat and clean. The code I use to achieve this: UIDatePicker *datePicker = [[UIDatePicker alloc] init]; datePicker.frame=CGRectMake(20, 45.0, 240.0, 150.0); datePicker.minimumDate=[NSDate date]; //Forget about this logic. NSString *alertTitleString=@""; if(self.presentingViewController !=nil) {

问题 I'm new to iOS development, learning bits and pieces. I've few more queries in continuation to another thread (iOS7: How does Apple make a navigation controller look like a uiactionsheet in the calendar app) on iOS 7 new event creation in default calendar that's shown when we click + on UINavigationBar (I assume). Does anyone know how to create UIDatePicker so that its displayed/hidden when I click on Start/End date field? I saw one video where UIActionSheet was used in XCode 4.5, but in that

问题 I use UIDatePicker to implement a countdown timer.After loading view datePickerMode set CountDownTimer: - (void)viewDidLoad { [super viewDidLoad]; self.countDownTimer.datePickerMode=UIDatePickerModeCountDownTimer; } First,set the countdown time in UIDatePicker ,then press the button to start the countdown: - (IBAction)StartCountdown:(id)sender { [sender setTitle:@"Cancel" forState:UIControlStateNormal]; countDownInterval = (NSTimeInterval)countDownTimer.countDownDuration; remainder =

问题 I have a normal UITableView with some regular UITableViewCell on it. And I know how to connect an UIDatePicker to UITextField . But now I would like to know if I could present the picker by tapping the whole cell even there is no text field on it. What I tried is that I added a UIToolBar as a subview on the picker and put code like [self showPicker] in one of the UITableViewDelegate methods: didSelectRowAtIndexPath and then when I tapped the cell the picker showed like I wish. But the problem