launching-application

问题 How can I detect the very first time launch of - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // if very first launch than perform actionA // else perform actionB } method? 回答1: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { if (![[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"]) { [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@

问题 Using Xcode beta 9 (v4), I\'m trying to launch the app by clicking on the \"play\" button. I get a \"build succeeded\" but right before launching, a popup message appears in Xcode: \"iPhone has denied the launch request.\" It used to work yesterday. It does work on the simulator. I\'ve rebooted my computer, the iPhone, uninstall the app, cleaned the build. Running out of ideas. 回答1: It may be code sign issue. Make sure you're signing with developer, not distribution. 回答2: It happens using

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . How do I detect when an iOS app is launched for the first time? 回答1: Pretty much what Marc and Chris said, though I prefer to change