CODEWITHSUNDEEP
iosiphonein-app-purchase
user3146380
user3146380

Reputation: 61

How to know application is installed or reinstalled in device

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.

Upvotes: 0

Views: 245

Answers (2)

alex
alex

Reputation: 2131

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:

link to discussion

link to apple's docs

Upvotes: 1

Shubham
Shubham

Reputation: 570

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];

}

Upvotes: 2

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