Question

Sams **Teach Yourself iPad Application development in 24 hour’s says I can “display an action sheet in a “nonanimated” fashion, filling a full popover view when it first appears…To do this, you need to show the action sheet with the method

showFromRect:inView:animated

with the “rect” set to the dimensions of the popover, the view set to the popover view controller’s view, and “animated” set to false. The display of the action sheet would need to take place when the popover view is first loaded such as in the viewDidLoad method of the popover view controller.

OK, easy.. here’s my code in my popover’s viewDidLoad method:

- (void)viewDidLoad {

self.contentSizeForViewInPopover=CGSizeMake(400.0,400.0);


    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Available Actions" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Destroy" otherButtonTitles:@"Negotiate", @"Compromise", nil];

    [actionSheet showFromRect:[self.view bounds] inView:self.view  animated:NO];

    [actionSheet release];

    [super viewDidLoad];
}

But this fails every time at the inView:self.view parameter with the exception:

Invalid parameter not satisfying view != nil

Any ideas?

Note, if I put this exact same code in an IBAction method and trigger it from a button in the popover, it works without a hitch!

Answer 1

One solution is to call the UIActionSheet in viewWillAppear or viewDidAppear: For example:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [self showActionSheet];
}

- (void)showActionSheet {
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Available Actions" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Destroy" otherButtonTitles:@"Negotiate", @"Compromise", nil];

    [actionSheet showFromRect:[self.view bounds] inView:self.view  animated:NO];

    [actionSheet release];
}