How can i detect 3rd time app launch - ios

Question

I want to show an alertview on third time my app is launched. I have searched everywhere but can't find the solution. How can I know that my app has been launched for the third time?
Thanks in Advance

Answer 1

you can use these methods to read and write to file with very little effort
+ (void) setSetting: (NSString *)key value: (NSString *)value {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:value forKey:[NSString stringWithFormat:#"%#", key]];
[defaults synchronize];
}
+ (NSString *) getSetting: (NSString *)key defaultVal: (NSString *)defaultVal {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *setting = [defaults stringForKey:[NSString stringWithFormat:#"%#", key]];
if (setting == nil) {
setting = defaultVal;
}
return setting;
}
you can just update a value you have stored in the user defaults each time the didFinishLaunchingWithOptions: in your appDelegate is triggered

Answer 2

Thats easy. Save an NSNumber in your NSUserDefaults and increase it every time you're launching your application. When it hits 3 then show an alert.

Answer 3

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)options {
// ...
if ([self plusPlusLaunchCount] == 3) {
[self showRateUsAlert];
}
return YES;
}
- (void)showRateUsAlert {
// show the Rate Us alert view
}
- (NSInteger)plusPlusLaunchCount {
static NSString *Key = #"launchCount";
NSInteger count = 1 + [[NSUserDefaults standardUserDefaults] integerForKey:Key];
[[NSUserDefaults standardUserDefaults] setInteger:count forKey:Key];
return count;
}