小编Mee*_*eet的帖子

(NSString *)
getApplicationUsage{

    double directorySizeInBytes = 0.0f;

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSUserDomainMask, YES);

    NSString *pathStr = [paths objectAtIndex:0];

    pathStr = [pathStr stringByDeletingLastPathComponent];  //REMOVE THE LAST PATH COMPONENT i.e /Applications

    NSDirectoryEnumerator *enumrator = [[NSFileManager defaultManager] enumeratorAtPath:pathStr];


    for (NSString *itemPath in enumrator) {

        itemPath = [pathStr stringByAppendingPathComponent:itemPath];

        NSDictionary *attr  =   [[NSFileManager defaultManager] attributesOfItemAtPath:itemPath error:nil];

        directorySizeInBytes = directorySizeInBytes + [[attr objectForKey:NSFileSize] doubleValue];

    }


    NSString *applicationUsage = [NSString stringWithFormat:@"%0.0f MB",directorySizeInBytes /1000000];
    return applicationUsage;
}

我从几个博客中看到了有关此问题的混合答案.我听说此功能仅在Xcode 7在秋季发布时才可用,但同样有人说你现在可以在自己的设备上进行测试.如果可能的话,非常感谢任何指向优秀教程的链接.

我使用Objective-C代码在GameCenter中更新了排行榜和成就.但问题是每当我使用代码打开GameCenterController时它会显示Facebook Like unavailable.我该如何解决？我还在电话设置中登录了Facebook.我该怎么办？

我想在用户选择记住我复选框时保存密码.我有这样的代码:这是正确的吗？

在Appdelegate.m

@property(strong,nonatomic)NSString *savedno;

在.m文件中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];

    self.navcontrol =[[UINavigationController alloc]initWithRootViewController:self.viewController ];

    self.window.rootViewController = self.navcontrol;
    [self.window makeKeyAndVisible];

    self.savedno=[[NSUserDefaults standardUserDefaults]objectForKey:@"pass"];

    if(savedno==nil)
    {
        NSDictionary *saveDict=[NSDictionary dictionaryWithObject:savedno forKey:@"pass"];
        [[NSUserDefaults standardUserDefaults]registerDefaults:saveDict];
    }
    return YES;
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    /*
     Called when the application is about to terminate.
     Save data if appropriate.
     See also applicationDidEnterBackground:.
     */

    NSUserDefaults *userdefault=[NSUserDefaults …