How to Detect First Time App Launch on an Iphone

How to detect first time app launch on an iPhone

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    if (![[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"])
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }
    return YES;
}

How to detect Apps first launch in iOS?

Swift 4 and higher

You can use this anywhere to verify that the user is seeing this view for the first time.

func isAppAlreadyLaunchedOnce() -> Bool {
    let defaults = UserDefaults.standard
    if let _ = defaults.string(forKey: "isAppAlreadyLaunchedOnce") {
        print("App already launched")
        return true
    } else {
        defaults.set(true, forKey: "isAppAlreadyLaunchedOnce")
        print("App launched first time")
        return false
    }
}

Note: This method would return false after user re-installs app and launch first time.

how to detect daily first launch in iOS?

Thank you guys! got an easy solution. Thanks for the support

  let today = NSDate().formatted 
    if (NSUserDefaults.standardUserDefaults().stringForKey(Constants.FIRSTLAUNCH) == today)
    {
         //Already Launched today
    }
    else
    {
         //Today's First Launch
        NSUserDefaults.standardUserDefaults().setValue(today, forKey:Constants.FIRSTLAUNCH)
    }

extension NSDate {
var formatted: String {
    let formatter = NSDateFormatter()
    formatter.dateFormat = "MM/dd/yyyy"
    return  formatter.stringFromDate(self)
}

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

Try this one

if(NSUserDefaults.standardUserDefaults().boolForKey("HasLaunchedOnce") {
  // App already launched

} else {
  // This is the first launch ever
  NSUserDefaults.standardUserDefaults().setBool(true, forKey: "HasLaunchedOnce")
  NSUserDefaults.standardUserDefaults().synchronize()
}

Swift 3 version->

if (UserDefaults.standard.bool(forKey: "HasLaunchedOnce")) {
   // App already launched

} else {
   // This is the first launch ever         
   UserDefaults.standard.set(true, forKey: "HasLaunchedOnce")
   UserDefaults.standard.synchronize()
}  

Detect when an iOS app is launched for the first time?

Pretty much what Marc and Chris said, though I prefer to change the value when the app quits in case there're multiple areas of the application that need to know about it.
In code:

Objective-C

// -applicationDidFinishLaunching:
[[NSUserDefaults standardUserDefaults] registerDefaults:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES],@"firstLaunch",nil]];
// to check it:
[[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"];
// -applicationWillTerminate:
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"firstLaunch"];

Swift 5.0

// -applicationDidFinishLaunching:
UserDefaults.standard.register(defaults: ["firstLaunch":true])
// to check it:
UserDefaults.standard.bool(forKey: "firstLaunch")
// -applicationWillTerminate:
UserDefaults.standard.set(false, forKey: "firstLaunch")

how to detect first time app launch after update from app store ,iphone

You can compare the current version with the old version as follow:

[NSString stringWithFormat:@"Version %@",[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"]];

And with an if statement for the current version that you know it 1.1, 2.0 .... etc, you can handle it.

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