ios 获取当前app的版本信息

 NSDictionary *infoDictionary = [[NSBundlemainBundle] infoDictionary];

    //app名称

    NSString *app_Name = [infoDictionaryobjectForKey:@"CFBundleDisplayName"];

    //app版本

    NSString *app_Version = [infoDictionaryobjectForKey:@"CFBundleShortVersionString"];

    //app build版本

    NSString *app_Build = [infoDictionaryobjectForKey:@"CFBundleVersion"];

注意：我调试的时候infoDictionary是nil，找不到原因原来最后发现因为我的运行模式是release不是bug.