After In-App Purchase, viewWillAppear Loads The Purchased Item Multiple Times - ios

Question

I'm having trouble with my In-App Purchases. Upon leaving the MasterViewController (where the IAP items are listed and bought) I come to the ViewController which in the viewDidLoad it checks for purchased items, but I also have a viewWillAppear checking for purchased items and unlocking those purchased items right when the ViewController is loaded.
The problem is, every time the ViewController is reloaded or refreshed, left and then gone back to, the viewWillAppear checks for purchased items and unlocks the items again, which in my case the purchased items come from javascript files, which happens to load the JS multiple times, cluttering the app with the same IAP item over and over again.
For instance, if you purchased 'Bookmarks', every time you reload the ViewController, you'll get another 'Bookmarks' tool, over and over again.
How do I get it so that the IAP is loaded only one time?
My viewWillAppear looks like this:
- (void)viewWillAppear:(BOOL)animated {
// Check To See If The Uniques IAP Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_UNIQUES_KEY] isEqualToString: #"YES"]){ // NEW CODE
// Code to show bookmarks
} else {
NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:#"Uniques" withExtension:#"js"] encoding:NSUTF8StringEncoding error:nil];
[viewWeb stringByEvaluatingJavaScriptFromString:jsString]; }
NSLog(#"Shows uniques?: %#", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_UNIQUES_KEY]);
// Check To See If The PL Numbers IAP Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_PORTAL_LEVEL_KEY] isEqualToString: #"YES"]){ // NEW CODE
// Code to show bookmarks
} else {
NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:#"PortalLevel" withExtension:#"js"] encoding:NSUTF8StringEncoding error:nil];
[viewWeb stringByEvaluatingJavaScriptFromString:jsString]; }
NSLog(#"Shows portal levels?: %#", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_PORTAL_LEVEL_KEY]);
// Check To See If The PN IAP Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_PORTALS_KEY] isEqualToString: #"YES"]){ // NEW CODE
// Code to show bookmarks
} else {
NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:#"PortalNames" withExtension:#"js"] encoding:NSUTF8StringEncoding error:nil];
[viewWeb stringByEvaluatingJavaScriptFromString:jsString]; }
NSLog(#"Shows portal names?: %#", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_PORTALS_KEY]);
// Check To See If The Bookmarks IAP Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_BOOKMARKS_KEY] isEqualToString: #"YES"]){ // NEW CODE
// Code to show bookmarks
} else {
NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:#"bookmarks" withExtension:#"js"] encoding:NSUTF8StringEncoding error:nil];
[viewWeb stringByEvaluatingJavaScriptFromString:jsString]; }
NSLog(#"Shows bookmarks?: %#", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_BOOKMARKS_KEY]);
// Check To See If The Poke A Bowl Ad Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY] isEqualToString: #"No"]){ // NEW CODE
// Code to show ads
_PokeABowlAd.hidden = NO;
} else {
_PokeABowlAd.hidden = YES;
}
NSLog(#"Shows ads?: %#", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY]);
}

Answer 1

I think what you should do is make it so that each one is called at most once. You should use NSUserDefaults to accomplish this. Do something like this:
Put this in your AppDelegate.m:
//One new key for each IAP - put at the top of the AppDelegate.m and VC.m
#define IAP_FIRST_USED #"IAP 1 Used"
...
#define IAP_LAST_USED #"IAP X Used"
and
// In applicationDidFinishLaunchingWithOptions, should be the first method listed
[[NSUserDefaults standardUserDefaults] setObject: #"No" forKey: IAP_FIRST_USED];
...
[[NSUserDefaults standardUserDefaults] setObject: #"No" forKey: IAP_LAST_USED];
[[NSUserDefaults standardUserDefaults] synchronize];
And then in the VC.m modify viewWillAppear to be like this (this is an example of what just the first IAP should look like):
// Check To See If The PL Numbers IAP Has Been Paid For
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_PORTAL_LEVEL_KEY] isEqualToString: #"YES"]){ // NEW CODE
// NEW CODE BEGINS HERE
if ([[[NSUserDefaults standardUserDefaults] objectForKey:IAP_FIRST_USED] isEqualToString: #"No"]){
[[NSUserDefaults standardUserDefaults] setObject: #"Yes" forKey: IAP_FIRST_USED];
[[NSUserDefaults standardUserDefaults] synchronize];
// Code to show bookmarks
// End of code to show bookmarks
// NEW CODE ENDS HERE
}
} else {
NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:#"PortalLevel" withExtension:#"js"] encoding:NSUTF8StringEncoding error:nil];
[viewWeb stringByEvaluatingJavaScriptFromString:jsString];
}
Also remember to include the define statements in VC.m