How to check if the IOS app is running for the first time using SWIFT -

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• how detect first time app launch on iphone 12 answers

- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {     if ([[nsuserdefaults standarduserdefaults] boolforkey:@"haslaunchedonce"])     {         // app launched     }     else     {         [[nsuserdefaults standarduserdefaults] setbool:yes forkey:@"haslaunchedonce"];         [[nsuserdefaults standarduserdefaults] synchronize];         // first launch ever     }     return yes; } 

i searched question , got many answers in objective-c. can me in swift? thank in advance.

try one

if(nsuserdefaults.standarduserdefaults().boolforkey("haslaunchedonce") {   // app launched  } else {   // first launch ever   nsuserdefaults.standarduserdefaults().setbool(true, forkey: "haslaunchedonce")   nsuserdefaults.standarduserdefaults().synchronize() } 

swift 3 version->

if (userdefaults.standard.bool(forkey: "haslaunchedonce")) {    // app launched  } else {    // first launch ever             userdefaults.standard.set(true, forkey: "haslaunchedonce")    userdefaults.standard.synchronize() }