Initialize Properties - iphone

Question

So I have a class where I need to initialize some properties once after the first initialization. These properties need to not be reinitialized the whole run of the program. How do I do this in iOS 7 SDK? I tried use initWithNibName, but it doesn't run, at all. Same with init. What method should I use?
Here's my code
PSACurrentGame.h:
#import <UIKit/UIKit.h>
#import "phase10Scorer.h"
#interface PSACurrentGame : UIViewController
#property (strong, nonatomic) NSArray *playerNamesArray;
#property (nonatomic) BOOL moveNums;
#property (strong, nonatomic) phase10Scorer *scorer;
#property (strong, nonatomic) NSMutableArray *R1Scores;
#property (strong, nonatomic) NSMutableArray *R1Phases;
#property (strong, nonatomic) NSMutableArray *R2Scores;
#property (strong, nonatomic) NSMutableArray *R2Phases;
#property (strong, nonatomic) NSMutableArray *R3Scores;
#property (strong, nonatomic) NSMutableArray *R3Phases;
#property (strong, nonatomic) NSMutableArray *ToScores;
#property (strong, nonatomic) NSMutableArray *ToPhases;
#end
PSACurrentGame.m:
#import "PSACurrentGame.h"
#import "phase10Scorer.h"
#interface PSACurrentGame ()
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round1Scores;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round1Phases;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round2Scores;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round2Phases;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round3Scores;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *round3Phases;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *totalScores;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *totalPhases;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *playerNames;
#property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *roundLabelsSecondSet;
#end
#implementation PSACurrentGame
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
self.scorer = [[phase10Scorer alloc] init];
self.R1Scores = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.R1Phases = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.R2Scores = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.R2Phases = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.R3Scores = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.R3Phases = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.ToScores = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.ToPhases = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], [NSNumber numberWithInt:0], nil];
self.moveNums = true;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
int j = 0;
for (UILabel *playerLabel in self.playerNames) {
playerLabel.text = self.playerNamesArray[j];
j++;
}
if (self.moveNums) {
for (int i = 0; i < 5; i++) {
self.R3Scores[i] = self.R2Scores[i];
self.R2Scores[i] = self.R1Scores[i];
self.R1Scores[i] = self.ToScores[i];
self.R3Phases[i] = self.R2Phases[i];
self.R2Phases[i] = self.R1Phases[i];
self.R1Phases[i] = self.ToPhases[i];
self.ToScores[i] = [NSNumber numberWithInt:([self.scorer getScores:(i + 1)])];
self.ToPhases[i] = [NSNumber numberWithInt:([self.scorer getPhases:(i + 1)])];
}
}
int i = 0;
for (UILabel *tf in self.totalScores) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
pName.hidden = true;
tf.hidden = true;
i++;
continue;
}
tf.text = self.ToScores[i];
i++;
}
i = 0;
for (UILabel *tf in self.totalPhases) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.ToPhases[i];
i++;
}
i = 0;
for (UILabel *tf in self.round1Scores) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R1Scores[i];
i++;
}
i = 0;
for (UILabel *tf in self.round1Phases) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R1Phases[i];
i++;
}
i = 0;
for (UILabel *tf in self.round2Scores) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R2Scores[i];
i++;
}
i = 0;
for (UILabel *tf in self.round2Phases) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R2Phases[i];
i++;
}
i = 0;
for (UILabel *tf in self.round3Scores) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R1Scores[i];
i++;
}
i = 0;
for (UILabel *tf in self.round3Phases) {
UILabel *pName = self.playerNames[i];
if ([pName.text isEqualToString:#""]) {
tf.hidden = true;
i++;
continue;
}
tf.text = self.R1Phases[i];
i++;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 1

You should use awakeFromNib instead.
- (void) awakeFromNib {
//Custom initialization
}
initWithNibName is not called when you instantiate a view controller from a XIB or storyboard.

Answer 2

Well, there are also initWithStyle: and initWithCoder: :)
You could modify them all but I think an easier solution would be to use a 'lazy initialization'.
For instance, in your interface you have a #property defined like so:
#interface YourClass
...
#property (nonatomic, strong, readonly) YourType* propertyName;
...
#end
Note the readonly attribute. This means, that there will be no publicly accessible setter for this property (you mentioned, that these properties won't ever be modified).
Then in your .m file you can define a category:
#interface YourClass()
...
#property (nonatomic, strong) YourType* propertyName; //this will give us a private setter.
...
#end
And then you define a getter like so:
#implementation
...
-(YourType*)propertyName
{
if (nil == _propertyName)
{
//initialize _propertyName here. This code will run once.
}
return _propertyName;
}
...
#end
This way properties will be initialized on demand. The good thing is that there is a guarantee that they'll be initialized. The bad thing is that the first call to these methods would take more time. But there is another plus: object creation is cheaper.
P.S. This code uses ARC.