How to stop push button

Question

I'm newbie to develop iOS program and I need your help.

When i click on the button, my code checks a condition, if the condition is true, I want to access to the next UIViewController passing data with prepareForSegue, but if the condition is FALSE, I don't want to access to the next VC and stay on the current VC.

How could i do that?

When i click on my button, I directly access to the next VC, whatever the code in the IBAction. Is it possible to block the access?

I try to code that on a push button

- (IBAction)lancepartie:(id)sender {
...

Do you have both a segue and this action connected to the button in your storyboard? — Gavin, Feb 17 '14 at 19:58
You may want to start by doing some tutorials before posting questions on StackOverflow.com... This is iOS coding 101, and pretty much one of the first things you'll learn by picking up a book on iOS development. — runmad, Feb 18 '14 at 00:28

score 1 · Answer 1 · answered Feb 17 '14 at 19:46

The other answers should work, but they kind of ignore the whole point of segues: you shouldn't have to manually set actions on buttons for things like segues. Instead, you should override the - (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender selector.

To do that, you need to give your segue an identifier from Interface Builder, then add this code in your parent ViewController:

- (BOOL)shouldPerformSegueWithIdentifier:(NSString*)identifier sender:(id)sender
{
    if ([identifier isEqualToString:@"MyIdentifier"])
    {
        return someCondition;
    }
    else return YES;
}

score 0 · Answer 2 · answered Feb 17 '14 at 19:33

0

- (IBAction)lancepartie:(id)sender {
    BOOL someConditionHasBeenMet = NO;
    // check condition
    if (someConditionHasBeenMet) {
         // push view controller
    } else {
         // nothing
    }
}

answered Feb 17 '14 at 19:33

runmad

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// push view controller how could i do that? The launching to the newt VC is automatic, no ? – user3277279 Feb 17 '14 at 19:36

score 0 · Answer 3 · edited Feb 17 '14 at 19:55

0

try this code

- (IBAction)lancepartie:(id)sender
{
    if(Your_Condition_Is_True){
        [self performSegueWithIdentifier:@"Your_Segue_Identifier" sender:sender];
    }
    else {
        //do not switch controller
    }
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"Your_Segue_Identifier"]) {

    }
}

edited Feb 17 '14 at 19:55

Gavin

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answered Feb 17 '14 at 19:35

Pawan Rai

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How could i program to "do not switch controller" ? – user3277279 Feb 17 '14 at 19:39
if your condition is false the nothing will happen in following code. just do not write any code in else block. simple – Pawan Rai Feb 17 '14 at 19:40

How to stop push button

3 Answers3