//1.獲取NSUserDefaults檔案
    NSUserDefaults *userDefaults=[NSUserDefaults standardUserDefaults];
    //2.向檔案中寫入內容
    [userDefaults setObject:@"大屁股" forKey:@"人類"];
    [userDefaults setBool:YES forKey:@"男的女的"];
    [userDefaults setInteger:20 forKey:@"多大"];
    //3.必須存在的同步
    [userDefaults synchronize];
    //4.讀取檔案
    //根據key獲取內容
    NSString *name=[userDefaults objectForKey:@"人類"];
    BOOL set=[userDefaults boolForKey:@"男的女的"];
    NSInteger age=[userDefaults integerForKey:@"多大"];
    //列印
    NSLog(@"%@ , %d  , %ld",name,set,age);
    if(set==YES){
        NSLog(@"男的");
    }else{
        NSLog(@"女的");
    }