Not quite the answer to your question that you wanted, but...
Why do you have so many alerts? It sounds like you might be overusing them. Apple is quite clear in its Human Interface Guidelines about how you should use UIAlerts:
Avoid creating unnecessary alerts.
These alerts are usually unnecessary
if they:
- Merely increase the visibility of some information, especially
information that is related to the
standard functioning of your
application.
Instead, you should design an
eye-catching way to display the
information that harmonizes with your
app’s style.
- Update users on tasks that are progressing normally.
Instead, consider using a progress
view or an activity indicator to
provide progress-related feedback to
users (these methods of feedback are
described in “Progress View” and
“Activity Indicator”).
- Ask for confirmation of user-initiated actions.
To get confirmation for an action the
user initiated, even a potentially
risky action such as deleting a
contact, you should use an action
sheet.
- Inform users of errors or problems about which they can do nothing.
Although it might be necessary to use
an alert to tell users about a
critical problem they can’t fix, it’s
better to integrate such information
into the UI, if possible. For example,
instead of telling users every time a
server connection fails, display the
time of the last successful
connection.
If you're overusing alerts: don't. Then your original question may become moot.