Question

If I want my app to behave differently on a jailbroken iPhone, how would I go about determining this?

Answer 1

It depends what you mean by jailbreak. In the simple case, you should be able to see if Cydia is installed and go by that – something like

NSString *filePath = @'/Applications/Cydia.app'; if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {    // do something useful } 

For hacked kernels, it’s a little (lot) more involved.