-(BOOL)isFirstLoad
{if(!标记第一次开启得文件存在)//不存在
    {//创建这个标记文件；return YES;}else{return NO;}
}

+ (BOOL) isFirstLaunchForSwipeView {NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *documentsDirectory = [paths objectAtIndex:0];if (!documentsDirectory) {return NO;}NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"firstlaunch.plist"];// 文件目录存在检查if(![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {NSError *error;BOOL result = [[NSFileManager defaultManager] createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:&error];if (!result) {return NO;}}else {return NO;}return YES;
}//调用得时候我是这么操作的。

 if ([类方法名 isFirstLaunchForSwipeView] )
{//创建引导图的方法self.swipePageCtl =[[POPSwipePageController alloc] init];[self.window addSubview:self.swipePageCtl.view];
}

在didFinishLaunchingWithOptions方法中加入如下代码：
if(![[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]){[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];NSLog(@"第一次启动");}else{NSLog(@"已经不是第一次启动了");}现在的APP中流行在程序第一次启动时显示一些新手引导页面，下面的代码可用于判断此APP是否第一次启动，或升级后的第一次启动。#define LAST_RUN_VERSION_KEY        @"last_run_version_of_application"
- (BOOL) isFirstLoad{NSString *currentVersion = [[[NSBundle mainBundle] infoDictionary]objectForKey:@"CFBundleShortVersionString"];    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];NSString *lastRunVersion = [defaults objectForKey:LAST_RUN_VERSION_KEY];if (!lastRunVersion) {[defaults setObject:currentVersion forKey:LAST_RUN_VERSION_KEY];return YES;// App is being run for first time
    }else if (![lastRunVersion isEqualToString:currentVersion]) {[defaults setObject:currentVersion forKey:LAST_RUN_VERSION_KEY];return YES;// App has been updated since last run
    }return NO;
}