检查我的应用程序的首次启动 [英] Check for first launch of my application

问题描述

如何使用NSUserDefaults检查这是否是我的应用程序的首次启动，并在我的应用程序首次打开时运行一些代码?

How would I check if it is the first launch of of my application using NSUserDefaults and running some code for the first time my app opens?

推荐答案

这应该为您指明正确的方向:

This should point you in the right direction:

static NSString* const hasRunAppOnceKey = @"hasRunAppOnceKey";
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
if ([defaults boolForKey:hasRunAppOnceKey] == NO)
{
    // Some code you want to run on first use...
    [defaults setBool:YES forKey:hasRunAppOnceKey];
}

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