版本号比较

compare_version

    NSString *num1 = @"2.7.14.2345";
    NSString *num2 = @"2.12.8.1234";
    //2.7.14.2345
//    2.12.8.1234
    if ([num1 compare:num2 options:NSNumericSearch] == NSOrderedDescending) {
        NSLog(@"%@ is bigger",num1);
    }else
    {
        NSLog(@"%@ is bigger",num2);
    }