我已经实现了在弹出框内显示日期选择器,以编程方式进行,如 UIDatePicker in UIPopover 中所示。 .
但我一直在尝试在界面生成器中这样做,我已经制作了一个名为 DatePickerViewController.m 的 View Controller ,其中包含一个 DatePicker 及其对应的 IBoulet
#import <UIKit/UIKit.h>
@interface DatePickerViewController : UIViewController
@property (strong, nonatomic) IBOutlet UIDatePicker *birthdayDatePicker;
@end
然后我需要在编辑生日文本字段时将其显示在弹出窗口中。所以我使用下面的代码
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
//Assign DatePicker to Birthday TextField
//build our custom popover view
DatePickerViewController* popoverContent = [[DatePickerViewController alloc] init];
//resize the popover view shown
//in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 216);
// dismiss existing popover
if (self.popoverControllerBirthday)
{
[self.popoverControllerBirthday dismissPopoverAnimated:NO];
self.popoverControllerBirthday = nil;
}
//create a popover controller with my DatePickerViewController in it
UIPopoverController *popoverControllerForDate = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
//Set the delegate to self to receive the data of the Datepicker in the popover
popoverControllerForDate.delegate = self;
//Adjust the popover Frame to appear where I want
CGRect myFrame =textField.frame;
myFrame.origin.x = 260;
myFrame.origin.y = 320;
//Present the popover
[popoverControllerForDate presentPopoverFromRect:myFrame
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionDown
animated:YES];
self.popoverControllerBirthday = popoverControllerForDate;
return NO; // tells the textfield not to start its own editing process (ie show the keyboard)
}
而且我还在我当前的 ViewController 中导入自定义 DatePickerViewController
#import "DatePickerViewController.h"
但它没有在弹出框内显示日期选择器。
有人知道会发生什么吗?
最佳答案
您可能希望通过以编程方式创建 ViewController 和 DatePicker 来避免 Storyboard中的所有工作:
//build our custom popover view
UIView *v = [[UIView alloc] init];
CGRect pickerFrame = CGRectMake(0, 0, 320, 216);
UIDatePicker *pView=[[UIDatePicker alloc] initWithFrame:pickerFrame];
pView.datePickerMode = UIDatePickerModeDate;
self.datePicker = pView;
[v addSubview:self.datePicker];
UIViewController *popoverContent = [[UIViewController alloc]init];
popoverContent.view = v;
//resize the popover view shown
//in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 216);
// dismiss existing popover
if (self.pcDatePicker)
{
[self.pcDatePicker dismissPopoverAnimated:NO];
self.pcDatePicker = nil;
}
//create a popover controller with my DatePickerViewController in it
UIPopoverController *popoverControllerForDate = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
//Set the delegate to self to receive the data of the Datepicker in the popover
popoverControllerForDate.delegate = self;
//Adjust the popover Frame to appear where I want
CGRect myFrame = sender.frame;//CGRectMake(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2, 320, 200);
myFrame.origin.x = 260;
myFrame.origin.y = 320;
//Present the popover
[popoverControllerForDate presentPopoverFromRect:myFrame
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
self.pcDatePicker = popoverControllerForDate;
然后使用委托(delegate)方法获取日期:
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController
{
self.startDate = self.datePicker.date;
}
关于ios - 如何使用 StoryBoard 在 iPad 上的 Popover 中显示 UIDatePicker?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11993096/