没有箭头的超控器?

尽管苹果是否会批准那些不带箭头的popover应用程序还存在一些疑问,但你可能想看看这个 post regarding arrows post regarding modal views .

下面的方法对我来说很好(包括iOS7)

 [popoverController presentPopoverFromRect:CGRectMake(0, 0, 20, 20)
                                    inView:self.view 
                  permittedArrowDirections:NULL 
                                  animated:YES];

0 到 permittedArrowDirections 属性。

[popoverController presentPopoverFromRect:YOUR_RECT
                                    inView:self.view 
                  permittedArrowDirections:0
                                  animated:YES];

上边框是通过在popover和显示的视图控制器之间放置导航控制器来生成的。

换句话说,popover提供一个导航控制器,并且导航控制器的根视图控制器被设置为您的视图控制器。这将生成标题栏,并允许您使用 [self setTitle:@"My Title"] 并添加导航按钮。

您可以通过使用UINavigationController并将UIViewControllers添加到导航控制器来添加标题。设置UIViewController的“title”属性以显示标题。

http://blog.teamtreehouse.com/customizing-the-design-of-uipopovercontroller

简单实现示例(在本例中,mycustompopopooverbackgroundview是uipopopooverbackgroundview的子类):

UIViewController *vCtrlr = [[UIViewController alloc] initWithNibName:nil bundle:nil];
vCtrlr.title = @"My Title";
self.navCtrlr = [[UINavigationController alloc] initWithRootViewController:vCtrlr];
self.popCtrlr = [[UIPopoverController alloc] initWithContentViewController:_navCtrlr];
_popCtrlr.popoverBackgroundViewClass = [MyCustomPopoverBGView class];
            [_popCtrlr presentPopoverFromRect:CGRectMake(0,
                                                         0,
                                                         320,
                                                         150)
                                       inView:self permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

只需复制和粘贴下面的代码

UIViewController *popovercontroller=[[UIViewController alloc] init];
UIView *popoverView=[[UIView alloc] initWithFrame:CGRectMake(312,390, 400, 344)];
popoverView.backgroundColor=[UIColor whiteColor];

popovercontroller.contentSizeForViewInPopover=CGSizeMake(400, 300);



UIDatePicker *pickerView = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 44, 400, 0)];
[pickerView setTintColor:[UIColor blackColor]];
[pickerView addTarget:self action:@selector(dueDateChanged:) forControlEvents:UIControlEventValueChanged];

pickerView.datePickerMode = UIDatePickerModeDate;
pickerView.hidden = NO;
NSString *bs ; //= [NSString alloc];
//    //NSDate *newDate = [NSData alloc];
bs =  CurrentSelectedDate;
if (bs.length >= 1) {
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init] ;
    //        //[dateFormatter setDateStyle:NSDateFormatterLongStyle];
    //        [dateFormatter setTimeStyle:NSDateFormatterNoStyle];
    [dateFormatter setDateFormat:@"dd-MMM-yyyy"];
    // NSDate *myDate = [dateFormatter dateFromString: txtText.text];
    pickerView.date = [dateFormatter dateFromString: CurrentSelectedDate];

}
else
{
    pickerView.date = [NSDate date];
}
[popoverView addSubview:pickerView];



// pickerView.date = [dateFormatter dateFromString:txtText.text];
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 400, 44)];
pickerToolbar.barStyle = UIBarStyleDefault;
pickerToolbar.barTintColor=[UIColor colorWithRed:150.0f/255.0f green:91.0f/255.0f blue:129.0f/255.0f alpha:1.0f];

[pickerToolbar sizeToFit];
self.navigationController.toolbar.barTintColor = [UIColor colorWithRed:150.0f/255.0f green:91.0f/255.0f blue:129.0f/255.0f alpha:1.0f];
NSMutableArray *barItems = [[NSMutableArray alloc] init];

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:self action:nil];
[barItems addObject:flexSpace];

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)];
doneBtn.tintColor=[UIColor whiteColor];
[barItems addObject:doneBtn];

UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
 cancelBtn.tintColor=[UIColor whiteColor];
[barItems addObject:cancelBtn];

[pickerToolbar setItems:barItems animated:YES];


[popoverView addSubview:pickerToolbar];
popovercontroller.view=popoverView;

pickerViewPopup = [[UIPopoverController alloc] initWithContentViewController:popovercontroller];

[pickerViewPopup presentPopoverFromRect:CGRectMake(312, 212, 400, 344) inView:self.view permittedArrowDirections:0 animated:YES];