toggle between UIBarButtonSystemItemPlay and UIBarButtonSystemItemPause

Question

Have two UIBarButtonItems want to make it as one UIBarButtonItem and toggle between them

UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc]
                   


        

Answer 1

I had a much simpler solution to that issue:

- (void) setStartStopButton:(BOOL)startorstop
{
    UIBarButtonItem *startStopButton = nil;
    if (startorstop == YES) {
        startStopButton = [[UIBarButtonItem alloc]     initWithBarButtonSystemItem:UIBarButtonSystemItemPause target:self action:@selector(startStopAction:)];
    }
    else
    {
        startStopButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPlay target:self action:@selector(startStopAction:)];
    }
    self.navigationItem.rightBarButtonItem = startStopButton;
    [startStopButton release];
}

- (IBAction)startStopAction:(id)sender
{
    if (task.isActive) 
    {
        [task stopTask];
    }
    else
    {
        [task startTask];
    }
    [self setStartStopButton:task.isActive];
}

And then I call the first method to set the button in viewWillAppear as well to set the button before the view appears onscreen.