UIAlertView does not wait - iphone

Question

I am using multiple UIAlertViews in my code as follows
-(void) myfunc
{
myAlertView1 = [[UIAlertView alloc] initWithTitle:#"Message" message:[list objectAtIndex:1] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[myAlertView1 show];
[myAlertView1 release], myAlertView1 = nil;
{
do something
}
myAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:[list objectAtIndex:1] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[myAlertView show];
[myAlertView release], myAlertView = nil;
}
When I run the program in simulator
I see myAlertView1 (Message) briefly and it does not waits for Ok button click
then I see myAlertView (Error) which waits for Ok button click and after that I again see myAlertView1 (Message) and it waits till OK button is clicked.
Logically I want to see myAlertView1(Message) and wait till Ok button is clicked and then see myAlertView (Error ) and wait till button is clicked.
Am I missing something here?

Answer 1

UIAlertView is not modal as one might expect. You should wait for your delegate to recieve alertView:didDismissWithButtonIndex: before creating and showing the second UIAlertView

Answer 2

Here is how you can make your dialog modal.
I ran into this while researching a similar question from a MonoTouch/C# user, so I wrote this sample for him. The same sample can be trivially ported to Objective-C.
To do this, what you can do is to run the mainloop manually. I have not managed to stop the mainloop directly, so I instead run the mainloop for 0.5 seconds and wait until the user responds.
The following function shows how you could implement a modal query with the above approach:
int WaitForClick ()
{
int clicked = -1;
var x = new UIAlertView ("Title", "Message", null, "Cancel", "OK", "Perhaps");
x.Show ();
bool done = false;
x.Clicked += (sender, buttonArgs) => {
Console.WriteLine ("User clicked on {0}", buttonArgs.ButtonIndex);
clicked = buttonArgs.ButtonIndex;
};
while (clicked == -1){
NSRunLoop.Current.RunUntil (NSDate.FromTimeIntervalSinceNow (0.5));
Console.WriteLine ("Waiting for another 0.5 seconds");
}
Console.WriteLine ("The user clicked {0}", clicked);
return clicked;
}

Answer 3

Here you can do it as follows:
-(void) myfunc
{
myAlertView1 = [[UIAlertView alloc] initWithTitle:#"Message" message:[listobjectAtIndex:1] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[myAlertView1 show];
[myAlertView1 release], myAlertView1 = nil;
{
do something
}
}
And when you get alertview, you can click OK button which calls another method to open another alertview.
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex==0)
{
[self open_secondAlert];
}
}
-(void)open_secondAlert
{
myAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:[list objectAtIndex:1] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[myAlertView show];
[myAlertView release], myAlertView = nil;
}
Please let me know if you still have any questions.
Thanks,
Best Regards,
Gurprit