objective c - How to write a cydia app -

I'm thinking about hooking some iphone feature in the form of a cydia tweak that runs on iPhone startup and SMS or call Was there.

So I wanted to know where I should start:

1. How to write a cydia application (xCode? Toolchain? Which Toolbox? How to Install it? )
2. Where can I find a document about the hooking methods of mobile substrate?
3. How can I star my application on iPhone startup?

   I would be happy if someone

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   I know there are other ways to do this, but if you have a licensed iOS developer, then you can just sign the code in your app and put it in one of your registered test instruments. Those who follow the jailbrokes and follow the steps given below:

   Download iFile from the Cydia Store. I would suggest paying for it, but you can find other sources where you can get a broken version. Then use iFile on the device and go to the following directory: var / mobile / applications / YourAppName Select yourAppName.app folder Zip file button, (between the display + and the trash button) you indicate the zip name The file will be given and the hit is the zip file that you submit to Cydia, you can email it directly from within iFile, or if you use a program like Disk Ed to drag it from your device Want to c. has been done!

   To verify, you need to copy the .app file to the following directory: var / stash / applications Exit iFile and delete your app from device. Respring, Reboot, or Restart
   icon will then be on your desktop.

   Hope helps anybody !!!

   Note: This is against Apple policy, but if you do not tell that I will not;)