I am doing one application. In that I am using auto renewal subscription. When I install my application, I will do the subscribe operation. And whenever I reinstall the same application in same device, I have to use the restore operation. So how to find application is install or reinstall.
Asked
Active
Viewed 236 times
2 Answers
2
you can store the flag value in keychain according to app is installed or not.
use this link for storing value in keychain
http://dev-metal.blogspot.in/2010/08/howto-use-keychain-in-iphone-sdk-to.html
Also for checking application on device that is install or not use this:
Detecting programmatically whether an app is installed on iPhone
use this code for saving value
- (void) savePassword: (NSString*) password {
[self.keychainItemWrapper setObject:password forKey:
(id)kSecValueData];
}
for retrieve value:
- (void) retrievePassword {
return (NSString*) [self.keychainItemWrapper objectForKey:
(id)kSecValueData];
}
-
Is this keychain storage is safe?And can i store my information with any key? – user3146380 Feb 25 '14 at 07:17
-
When you need to store data securely from within your iPhone application, sooner or later you will step over the iPhone keychain. This is the super-duper built-in iPhone safe, kindly provided to you by the fruit company. yes you can store value by any key – Shubham Feb 25 '14 at 07:18
-
If any other application,store the data with same key.Then what i can get when i try to retrieve. – user3146380 Feb 25 '14 at 07:19
-
It will overwrite with new value it's your unique key value you need to take other key value pair for other application – Shubham Feb 25 '14 at 07:22
-
So Can i store my data with custom key? – user3146380 Feb 25 '14 at 07:31
-
But in that link they given only some of the keys to set the objects.Can you please send me any link for proof for using any key – user3146380 Feb 25 '14 at 10:57
-
you can create and use your own key I have used same things in multiple my apps. – Shubham Feb 25 '14 at 11:22
-
Should the return type of the `retrievePassword` be `(NSString *)`? Otherwise I think your `return` doesn't have any effect. – Islam Jul 28 '15 at 18:29
1
If any application will write to keychain it's flags to make programmer's life easier, it will become a trash. Keychain main mission - is to store secure data.
As for subscribtions - use methods, provided by framework to find out whether app has something to restore.For example MKStore Kit
More useful links:
