获得当前app的版本号

NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];

 CFShow(infoDictionary);

// app名称

 NSString *app_Name = [infoDictionary objectForKey:@"CFBundleDisplayName"];

 // app版本

 NSString *app_Version = [infoDictionary objectForKey:@"CFBundleShortVersionString"];

 // app build版本

 NSString *app_build = [infoDictionary objectForKey:@"CFBundleVersion"];