ios – 如何使用StoryBoard在iPad上的Popover中显示UIDatePicker？

概述我已经实现了在popover中显示datepicker,以编程方式执行它,如 UIDatePicker in UIPopover所示. 但我一直在尝试在界面生成器中完成它,我已经创建了一个名为DatePickerViewController.m的视图控制器,其中包含一个DatePicker及其相应的IBoulet #import <UIKit/UIKit.h>@interface DatePi 我已经实现了在popover中显示datepicker,以编程方式执行它,如 UIDatePicker in UIPopover所示.

但我一直在尝试在界面生成器中完成它,我已经创建了一个名为DatePickerVIEwController.m的视图控制器,其中包含一个DatePicker及其相应的IBoulet

#import <UIKit/UIKit.h>@interface DatePickerVIEwController : UIVIEwController@property (strong,nonatomic) IBOutlet UIDatePicker *birthdayDatePicker;@end

然后,当编辑生日文本字段时,我需要在d出框中显示它.所以我使用以下代码

- (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)}

我还在当前的VIEwController中导入自定义DatePickerVIEwController

#import "DatePickerVIEwController.h"

但它没有在popover中显示datepicker.

有人知道会发生什么吗？

解决方法 您可能希望通过以编程方式创建VIEwController和DatePicker来避免故事板中的所有工作：

//build our custom popover vIEwUIVIEw *v = [[UIVIEw alloc] init];CGRect pickerFrame = CGRectMake(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 sizepopoverContent.contentSizeforVIEwInPopover = CGSizeMake(320,216);// dismiss existing popoverif (self.pcdatePicker){    [self.pcdatePicker dismisspopoverAnimated:NO];    self.pcdatePicker = nil;}//create a popover controller with my DatePickerVIEwController in itUIPopoverController *popoverControllerForDate = [[UIPopoverController alloc] initWithContentVIEwController:popoverContent];//Set the delegate to self to receive the data of the Datepicker in the popoverpopoverControllerForDate.delegate = self;//Adjust the popover Frame to appear where I wantCGRect myFrame = sender.frame;//CGRectMake(SCREEN_WIDTH / 2,SCREEN_HEIGHT / 2,200);myFrame.origin.x = 260;myFrame.origin.y = 320;//Present the popover[popoverControllerForDate presentPopoverFromrect:myFrame                                          inVIEw:self.vIEw                        permittedArrowDirections:UIPopoverArrowDirectionAny                                        animated:YES];self.pcdatePicker = popoverControllerForDate;

然后使用委托方法获取日期：

- (voID)popoverControllerDIDdismisspopover:(UIPopoverController *)popoverController{    self.startDate = self.datePicker.date;}

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