MobileCoreService这个系统的库，里面有个私有的类LSApplicationWorkspace

，利用运行时可以获得私有类里面的方法，- (id)allInstalledApplications;  该方法能够获得设备上所有的应用信息，包括系统的和用户的应用

获得的应用的信息是一个类对象LSApplicationProxy，该对象里面有方法获得app的版本，名称，bundleID，类型

- (void)getAllApps{    //获取手机上所有的app    Class LSApplicationWorkspace_class = objc_getClass("LSApplicationWorkspace");    NSObject *workspace = [LSApplicationWorkspace_class performSelector:@selector(defaultWorkspace)];    NSArray *apps = [workspace performSelector:@selector(allInstalledApplications)];        Class LSApplicationProxy_class = objc_getClass("LSApplicationProxy");    for (int i = 0; i < apps.count; i++) {        NSObject *temp = apps[i];        if ([temp isKindOfClass:LSApplicationProxy_class]) {            //应用的bundleId NSString *appBundleId = [temp performSelector:NSSelectorFromString(@"applicationIdentifier")];           //应用的名称     NSString *appName = [temp performSelector:NSSelectorFromString(@"localizedName")];           //应用的类型是系统的应用还是第三方的应用  NSString * type = [temp performSelector:NSSelectorFromString(@"applicationType")];          //应用的版本     NSString * shortVersionString = [temp performSelector:NSSelectorFromString(@"shortVersionString")];           NSLog(@"类型=%@应用的BundleId=%@ ++++应用的名称=%@版本号=%@",type,appBundleId,appName,shortVersionString);             }    } }