获取app版本号

NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString *name = [infoDictionary objectForKey:@"CFBundleDisplayName"];
NSString *version = [infoDictionary objectForKey:@"CFBundleShortVersionString"];
NSString *build = [infoDictionary objectForKey:@"CFBundleVersion"];
NSString *label = [NSString stringWithFormat:@"%@ v%@ (build %@)", name, version, build];

NSLog(@"%@",label);