Color Cycle Xcode UIView background - xcode

Question

Im just a newbie so not sure if this is the correct place to ask.
I found this code on your site to make an xcode iphone app where the background color cycles - UIView backgroundColor color cycle
and it works great! How could I tweak it so it just cycles through once and ends on the last colour in the array?
Thank you for you help.
// ViewController.m
// colorCycle
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
[self doBackgroundColorAnimation];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) doBackgroundColorAnimation {
static NSInteger i = 0;
NSArray *colors = [NSArray arrayWithObjects:[UIColor greenColor], [UIColor yellowColor], [UIColor orangeColor], [UIColor redColor], nil];
if(i >= [colors count]) {
i = 0;
}
[UIView animateWithDuration:2.0f animations:^{
self.view.backgroundColor = [colors objectAtIndex:i];
} completion:^(BOOL finished) {
++i;
[self doBackgroundColorAnimation];
}];
}

Answer 1

You can just add a return statement in the if block.
- (void) doBackgroundColorAnimation {
static NSInteger i = 0;
NSArray *colors = [NSArray arrayWithObjects:[UIColor greenColor], [UIColor yellowColor], [UIColor orangeColor], [UIColor redColor], nil];
if(i >= [colors count]) {
return;
}
[UIView animateWithDuration:2.0f animations:^{
self.view.backgroundColor = [colors objectAtIndex:i];
} completion:^(BOOL finished) {
++i;
[self doBackgroundColorAnimation];
}];
}