Question

Scenario:

UIScrollView has a UIButton. Tapping the UIButton leads to a UIPopoverController presenting itself from a specified rect. The UIPopoverController’s contentViewController is a UIViewController with a UIDatePicker.

Code that is fired when the button is tapped (button is of type custom with touch up inside tap registered):

- (void)showCalendar:(id)sender {
    dateViewController = [[UIViewController alloc] init];

    datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 240, 200)];
    datePicker.datePickerMode = UIDatePickerModeDate;
    datePicker.hidden = NO;
    datePicker.date = [NSDate date];

    [datePicker addTarget:self
                   action:@selector(DateChanged:)
         forControlEvents:UIControlEventValueChanged];

    NSLocale *US = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
    NSCalendar *cal = [NSCalendar currentCalendar];
    [cal setLocale:US];
    [datePicker setCalendar:cal];
    [datePicker setMaximumDate:[NSDate date]];


    dateViewController.view = datePicker;

    dateViewController.contentSizeForViewInPopover = CGSizeMake(240, 200);
    self.popoverController = [[UIPopoverController alloc] 
                               initWithContentViewController:dateViewController];
    self.popoverController.delegate = self;

    NSLog(@"YESYESYES");

        [self.popoverController presentPopoverFromRect:CGRectMake(753, 513, 1, 1) inView:parentView permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

    NSLog(@"NONONO");

}

There is a noticeable 1 second or more lag between the two NSLog statements when I connect the device to Xcode and run the app. What could be the reason for such a lag?

Answer 1

Solved the issued by replacing

dateViewController.view = datePicker;

with

[dateViewController.view addSubview:datePicker];