Ted2

you need to set the correct bundle, otherwise it doesn't know where to inject to

edit; oh just saw you already figured that out yourself.

Flex allows you to modify Objective-C/Swift methods, as it "dumps" those method. This is nice, especially for tweak development. However, if you take modern games as an example, flex will be useless 99% of the time. This is because game engines strip method names, also known as sub_x methods which you can not modify within flex as flex can not "dump" this.
In IDA, you're loading the game's executable, and have access to all of its code to be modified (note: most games have some server side code that you can not modify, hence why some games don't have things such as currency hacks as the server side validates this).
IDA is more complex than Flex, but with some tutorials you can find around here in the form you can quickly learn to mod games with IDA, especially Unity games as those games can be dumped with a tool called il2cppdumper. This does basically what flex does; It dumps all methods, classes, variables etc of the game and all you have to do is look up the address inside IDA and modify it.
 
 

The issue was that there was no UnityFramework. 

return old_AmmoAmount(instance) * 10; // Return whatever my current ammo is multiplied by 10 This is correct.

No, in programming you have getters and setters;
int getCoins() { return coins } void setCoins(int newValue) { coins = new_value } As you can see, to one of those functions you can pass a new value (SET). The other one just returns a variable (GET).
Function pointers are not any different, because the function pointer is that function and so, they work the same.
 
If for some reason you don't want to hook it, then I recommend opening the binary in IDA, go to the ReloadDuration method, and see which variable(s) is being used here (0x<some_value>. I assume this is an Unity game, so on top of the class ReloadDuration is in, you'll find a list of variables. See which one of them is inside ReloadDuration.

You can then change these variables in the FixedUpdate method, like so:
*(int*)((uint64_t)instance + 0x<variable_code> = 0;  

Nope. As the void ammo(bla, bla, bla) {} is the replacement method of the original method (which you named old_ammo), here you write your own logic of the method. If you only need to change the parameter values, you can just call the original method (old_ammo) with your own values and that will be enough. You could also do: 
void ammo(void *instance, int value, bool reload) { value = 9999; reload = false; old_ammo(instance, value, reload); } In this example you alter the parameter values it was originally called with and then call the method itself with your new values.

You need to type "c" or "continue" in the putty window to resume the game.

You need to load script.py not script.json.

Ok, this is not gonna be working with framework. A static library should be it.

Hello,
 
I managed to dump the game with https://github.com/AloneMonkey/frida-ios-dump

Here's the IPA: https://anonfile.com/Xc2cF8K1n8/FE_Heroes_ipa

https://www.mac-torrents.com

I can just put the .dylib in my .theos/_ folder & then compile it with this command:
dpkg-deb -Z lzma -b

Nope. You need iTunes to detect you phone first, so download iTunes, open it & plug your phone.

Type in terminal: "make clean package install" instead of "make package install"

You didn't hook anything.
 
You just have: "%hook"
It's supposed to be something like: %hook AppDelegate or %hook UnityAppController
 
& since I assume it's a unity game #il2cpp
 
you have to do: %hook UnityAppController
 
if not, search this "applicationDidBecomeActive" & take the delegate.

igmm template is for cheaters only. Use shmoo's menu.

Ios 10.2.1 doesnt have that l, ios 11 only

Its not available for ios 11 then

It shouldn't print anything

Pretty sure it has to do something with Colliders, rigidbody & collisions.
Work from there.
 
Fun thing: Google for something like: "Character walks through walls, how to fix?"
Devs will explain how to fix, you just have to do the opposite on it

See 0:30 till 0:50 --> https://www.youtube.com/watch?v=TGzrDXPp0oI&amp;t=85s
 

Google how to code gesture responding
https://www.google.nl/url?sa=t&amp;source=web&amp;rct=j&amp;url=https://developer.apple.com/documentation/uikit/uigesturerecognizer%3Flanguage%3Dobjc&amp;ved=2ahUKEwjjooKamPzbAhXQxqQKHcEEBYwQFjABegQIAxAB&amp;usg=AOvVaw14hr6k3_T4ymibiLip5Ocf

Fixed code:
void Update(void *cheats) { if(![menu isSwitchWithIdentifierActive: @"Money"]) { old_Update(cheats); } else { add_Money(cheats); } }  

Do you have llvm clang?

Can you show your makefile code