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POUIbutton don't change background inside IBAction
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copied!<p>I have 3 custom UIButtons with text, and when user click on one of buttons I check if answer is right. If it is right I want set button background green, if not red. Then I want to show next question automatic, after a little delay (he need a bit time to see if previous answer was right). </p> <p>The problem is that UIbutton background don't change inside IBAction, but it change inside setWordAndAnswers function. And I don't have any idea why it happens(((</p> <p>Here is the code:</p> <pre><code>-(void)setWordAndAnswers{ if([[currentCollection allWards] count]>0){ int randCard =arc4random_uniform([[currentCollection allWards] count]-1); currentWord=[[currentCollection allWards]objectAtIndex:randCard]; tvMainWord.text=[currentWord originalWord]; int wrightAnser =arc4random_uniform(2); for(int i=0;i[answers count];i++){ [[answers objectAtIndex:i]setBackgroundColor:[UIColor whiteColor]]; if(i==wrightAnser){ [[answers objectAtIndex:i] setTitle:[currentWord wordTranslate] forState:UIControlStateNormal]; } else{ [[answers objectAtIndex:i] setTitle:[self getRandomAnswer] forState:UIControlStateNormal]; } } } </code></pre> <p>}</p> <pre><code>- (IBAction)onClickCheckAnswer:(id)sender { if(!isGameRunning) return; UIButton *button = (UIButton *)sender; if([[sender title]isEqual:[currentWord wordTranslate]]){ [button setBackgroundColor:[UIColor greenColor]]; } else{ [button setBackgroundColor:[UIColor redColor]]; } [button setNeedsDisplay]; [NSThread sleepForTimeInterval:0.3f]; [self setWordAndAnswers]; </code></pre> <p>}</p>

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