Replace UIBarButtonItem with UIActivityIndicatorView

Question

Hi

I want to replace my UIBarButtonItem (used for refresh) with a UIActivityIndicatorView and, when the refresh is finished, I want to turn back to the refresh button and remove the UIActivityIndicatorView. Can anyone help me?

Thanks

Answer 1

Just create two different UIBarButtonItems

One for the activity indicator and another for a normal UIBarButtonItem.

UIActivityIndicatorView * activityView = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 25, 25)];
[activityView sizeToFit];
[activityView setAutoresizingMask:(UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin)];
UIBarButtonItem *loadingView = [[UIBarButtonItem alloc] initWithCustomView:activityView];
[self.navigationItem setRightBarButtonItem:loadingView];
[loadingView release];
[activityView release];

UIBarButtonItem * normalButton = [[UIBarButtonItem alloc] initWithTitle...];
[self.navigationItem setRightBarButtonItem:normalButton];
[normalButton release];

When you want to switch them, just reassign the rightBarButtonItem to whichever.

Answer 2

Here what works for me :

- (void) rightItemButtonWithActivityIndicator
{
    UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    [activityIndicator startAnimating];
    UIBarButtonItem *activityItem = [[UIBarButtonItem alloc] initWithCustomView:activityIndicator];
    [activityIndicator release];
    self.navigationItem.rightBarButtonItem = activityItem;
    [activityItem release];
}