CODEWITHSUNDEEP
objective-cios
sashab
sashab

Reputation: 1564

Objective C UIAlertView queue

I want to show multiple messages on iOS one by one, but the problem is that showing UIAlertView is non-blocking. I tried to handle alert closing with clickedButtonAtIndex and show same alert inside. Here is some code:

@interface ViewController : UIViewController <UIAlertViewDelegate>
...
@property UIAlertView *alert;
...
@end

...
[alert show]; //somewhere in code, starts chain of messages
...

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    // Some changes in alert object
    [alert show];
}

Upvotes: 1

Views: 1206

Answers (3)

freytag
freytag

Reputation: 4819

I prefer to set tags on the alert views:

#define ALERT_1   1
#define ALERT_2   2

...
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:...];
alert.tag = ALERT_1;
[alert show]; //somewhere in code, starts chain of messages
...

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (alertView.tag) {

        case ALERT_1: {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:...];
            alert.tag = ALERT_2;
            [alert show];
        } break;

        case ALERT_2: {
           ....
        } break;
    }

}

This way you don't have to use variables for the alert views.

Upvotes: 2

Jesse Gumpo
Jesse Gumpo

Reputation: 4787

I would have one UIAlertView and change its message on button click... Maybe increment its tag as well

try overriding 

-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex

instead of clickedButtonAtIndex

Upvotes: 2

Martin R
Martin R

Reputation: 539775

You need one property for each alert view you want to show. In the delegate function check which one finished and start the next one:

@interface ViewController : UIViewController <UIAlertViewDelegate>
...
@property UIAlertView *alert1;
@property UIAlertView *alert2;
@property UIAlertView *alert3;

@end

...
alert1 = [[UIAlertView alloc] initWithTitle:...];
[alert1 show]; //somewhere in code, starts chain of messages
...

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView == alert1) {
        alert2 = [[UIAlertView alloc] initWithTitle:...];
        [alert2 show];
    } else if (alertView == alert2) {
        alert3 = [[UIAlertView alloc] initWithTitle:...];
        [alert3 show];
    }

}

Upvotes: 0

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