(Part 3) Top products from r/jailbreak

tomf64 has explained it well. I'd like to add a little more to that, however. All the links he has given use Theos as the build system, and Logos for some nice syntactic sugar that Dustin Howett was kind enough to grace us with.


However, to be an effective developer, one must understand what is going on behind the scenes. For that, I'd suggest to pick up a nice book for learning Objective-C. Programming in Objective-C by Steve Kochan is a great book to start, in my opinion.


Once you're through with that, use Google to find and read one of the tens of thousands of "Get Started With iOS Development" tutorials (Like this one). The concepts taught there will be really easy to pick up, assuming you have a fair understanding of Objective-C. Write a few little apps for yourself, make sure your fair understanding expands to the hows and whys of everything.


Writing a tweak is a different beast altogether. It requires some knowledge of programming patterns (usually Apple engineers', you'll see them with experience), some guess work, and a lot of patience. You'd also do well to know how the Objective-C runtime works. Tweaks rely on the openness provided by it to get the job done. This is a great article to get you started, after which Apple's own Runtime Reference teaches you how to use everything.


If you have gone through all of these the articles provided by tom will suddenly make a lot more sense that they did before. The point of this comment is not to intimidate you, but I have seen a lot of newbie devs jump right into tweak making without having their basics clear. Then they're simply like a fish out of the water. Feel free to ask me anything more you may want.

EDIT: Actual line breaks. Whoops.

If you don't have any prior knowledge with programming, I'd first recommend learning Python. If you do have programming knowledge, then jump straight into ObjC. I read these 3 books and my Objective-C knowledge grew so much. I highly recommend reading these books.

Book One

Book Two

Book Three

I'd recommend reading these books in the order I listed them.

After you have read those books, you'll want to get friendly with theos. Theos is what you will use to make your tweaks. Learn how to install/use it here: http://iphonedevwiki.net/index.php/Theos/Getting_Started.

Now, you can look at open source tweaks. There is a great place to see a lot of them: http://iphonedevwiki.net/index.php/Open_Source_Projects.

Once you are comfortable, get started writing tweaks!

Always feel free to PM me if you need any help or have a question. :)

I prepare for my medical classes using those books:

Campbell Biology (10th Edition), truly an amazing piece of work would really encourage reading it, clear explination of concepts that people seem to forget when they progress further into the subjects

Chemistry: The Central Science (13th Edition), perfect referal in case you forget vital concepts of chemistry, works out well but fails in the orgainc chemisty

And for further reference we need to also buy even though some of the fact are outdated Organic Chemistry with Mastering Chemistry and Solution Manual (8th Edition), I found that this has a really sturdy and "enjoyable" methods(yes I enjoy what I study), and this is just half of it.

Now personally I have a "side job" that is paying me off really well and I couldn't even complain about it, but for most students they need even more books for "reference", education should be for free, I personally will not lie and straight out tell you that I upload these books on several websites, some in my session rely on much older books to study. I do support the fact that people should be rewarded for their efforts, yet not take it out on people, I really think the governments should fund & pay them instead.

Lol it happens, I normally clean mine every couple months and check it every so often to make sure it's clean. You can also blow in it as you clean with a toothpick to get any extra stuff out.

I have a couple of these brushes for cleaning phones I repair they work great.

http://www.amazon.com/ShaverAid-Electric-Shaver-Cleaning-Brush/dp/B001CJ693A

Ok so this is the amazon hub I have

http://www.amazon.com/AmazonBasics-4-Port-USB-2-0-Ultra-Mini/dp/B003M0NURK/ref=sr_1_1?ie=UTF8&qid=1407942392&sr=8-1&keywords=amazon+basic+usb+hub

Apple decided to put a software power limit to the USB CCK (Camera Connection Kit) a few years ago. The hardware is capable of outputting 100ma, but Apple limited it to 20ma. The trick works by making it think that there are 4 ports instead of one, meaning the iPad gives the hub 80ma, and then the hub can give 80ma to the usb stick. I believe that is how it works anyway.

Might I ask where you will be getting the usb sticks from? Will they be given to you (in lectures or from friends etc), or is it so you can plug in a usb stick back and forth from a computer? The reason I ask, is if it is for your use, I have found that the SD card CCK is much better for this. The SD card reader has no power limit, so no hub is required and it works for any card (formatted in FAT32/HFS+) - so 128gb cards work, and most likely 256gb cards when they become reasonably priced :P. Its a lot less messy (only one cable sticking out), and for the times when I want to plug it into a computer with no SD card slot, I can use a USB 3 to SD card reader;

Something like this (I'm in the UK so not sure of the best US equivalents)
http://www.amazon.com/Transcend-Information-Card-Reader-TS-RDF5K/dp/B009D79VH4/ref=sr_1_1?ie=UTF8&qid=1407942666&sr=8-1&keywords=usb+3+sd+card+reader

In terms of speed its the same as USB 2, and when it comes to mounting them in iFile its exactly the same as USB CCK. And I think the same price for the SD kit over USB and SD card prices are the same as USB sticks too.

Let me know whether that sounds better or if you still require USB. It really just depends on how often you are going to be doing it, I certainly wouldn't want to take out the hub in the middle of lecture or something - would kind of defeat the purpose of the mini :P.

ok i got you, but i really dont think this course will help you with that. there are books that cover exactly that topic like this one here

https://www.amazon.com/OS-X-iOS-Kernel-Programming/dp/1430235365

doing the course AFTER reading this book, will probably have a greater learning effect

That book is great. I'd also recommend Hacking and Securing iOS Applications. There are only a few chapters about iOS exploits, but it goes into good code-level detail.

There's also some overlap in techniques and technology in Mac Hackers Handbook

I don't know much about MyWi, but I use this hardware in my own home to get internet from a downstairs router to my upstairs desktop by sending it over the powerlines.

http://www.amazon.com/Sling-Media-SlingLink-Powerline-SL200-100/dp/B000NJ5VLQ

They've aged quite a bit, but a pair has worked great for me for many moves.

You can try something like a conductive glue and apply it with a toothpick.

http://www.amazon.com/Sciplus-Electrically-Conductive-Soldering-Wire/dp/B000Z9H7ZW

In the reviews on there some guy talks about how he fixed an internal connector on his phone with it so worth a shot I suppose. I think taking it to a professional might cost you enough to warrant actually buying a second hand replacement phone if you so desire.

In particular, I have a Tellus iphone 3GS that suffers from the no sim card message at times.

Its due to the way the sim slot is. Easiest quick fix, is use a piece of super thin tape over the card tray to hold the card in place securely. What I suspect is happening is that the sim card is sliding slightly while in the phone itself.

I just got one of these third party sim trays for my 3gs which, while not a perfect fit for it, does not seem to have the same issues and has gone for almost 5 days without the message.

For an iPhone 4, it cost $30 for the full kit and take less than 20mn to replace the screen :)

this one looks good

Get an ip camera like this one https://www.amazon.com/Foscam-FI8918W-Wireless-Network-Viewing/dp/B0046710G6, then you can watch your cats all day.

I got the:

2200mAh High Capacity Battery for iPhone 6 with Complete Replacement Tool Kit, Adhesive Tape and Instructions Included by Loctus 24 Months Warranty

However the amazon link no longer works. I just looked around and read the reviews until I found something that seemed decent.

I basically got something like this

Oh I just realized it cost me 20, not 30 bucks!

Well you don't need to be jailbroken to use this with your iPad.
L5 Universal Remote Control

I believe I was thinking of this one but unfortunately it doesn't look it will work with the volume buttons.

It looks like you can also find generic replacement cables on ebay- example.

I wasn't referring to the charging wire kit, I was talking about the wireless receiver. And you can use it with mac with this Driver

Ah I see what you meant now. I actually have the Bose earbuds. No replacement cable would work for this. I was thinking more along the likes of this but not sure if it will work still.

Will do, also not sure what a sidebar is. Gonna go checkout a book from the library on sidebars.

EDIT: is this what you mean? https://www.amazon.com/Sidebar-Book-I-Gwendolyn-Olmsted/dp/1502573326
if so then thats ( ͡° ͜ʖ ͡°)

>What exactly do you mean by watching it to see CPU? I'm quite familiar with Top -u, but is there a way to view just that processes CPU? I kind of want to watch it through my computer while browsing and see what happens.

You need to get its PID first. My favorite way to do that is with System Status from the App Store, which lists running processes with PIDs (although you can't kill them or anything).

Then use:

top -pid PID

To see just that process's stats.

>Does that Jetslammed tweak have anything related to this or help this?

Jetslammed can change a launchdaemon's HighWaterMark RAM limit, the limit of sustained RAM usage at which Jetsam automatically kills the daemon.

http://newosxbook.com/articles/MemoryPressure.html

The HWM can also be changed manually, but, in the end, it doesn't really help that much unless a daemon is only dying due to exceeding its HWM.

It can still be killed for other reasons if the system is low on memory.

It doesn't actually keep discoveryd from EVER being killed, so it doesn't really solve the issue of very large hosts (>300 KB) files causing random website disconnects due to discoveryd dying, leading to DNS failure.

It really just fixes it so that you can have Wifried and a small ad blocking hosts file at the same time since Wifried + even a small hosts file (like Light UHB) will cause discoveryd to use about 9-10 MB, exceeding the 8 MB HWM limit for a long period of time, causing discoveryd to be automatically killed, causing Wifried to re-initialize Wifi, causing random Wifi disconnects, which is even more problematic than even a DNS failure.

Wifried with Jetslammed raises the HWM for discoveryd to 12 MB from 8 MB, preventing the HWM killing of discoveryd with Wifried + small ad blocking hosts file. A large hosts file will exceed even this new limit, but, in that case, where discoveryd uses 20 MB or more, it will be killed by the system anyway for other reasons not related to the HWM.

>So do I have the correct Light UHB? Is that the one you use? I guess I might try reinstalling and maybe see. Haven't had an issue since its crash and (haven't checked today) haven't seen it anywhere near the top when running "top".

I use Light Untrusted Hosts. I've watched discovery's PID for about a month now. It's not being jetsam killed anymore even if I load a LOT of tabs and really stress it out. It never goes over 8 MB (the HWM) for any sustained period of time (even 8 MB requires A LOT of DNS activity), and never reaches enough RAM usage that the system would think to kill it to free memory (10-20 MB). Gamed (the GameCenter daemon) uses more memory than discoveryd with Light UHB . . .

>-unrelated- I love learning about all this stuff and your fountain of knowledge so far. Mind if I asked where you learned so much? I've been learning a lot about daemons lately, especially locationd and backboardd. I'm just curious as to where I can learn more about this stuff, learn how to read crash logs as so far it's just from the little experience I have, etc. I just can't find any good resources..

I've used OS X since it was in beta, and iOS is secretly just OS X in disguise with a TouchUI, a few processes missing, and a few processes added.

This book has been helpful to me in understanding jailbreaking, although it is a bit dated:

http://www.amazon.com/iOS-Hackers-Handbook-Charlie-Miller/dp/1118204123

Also a bit dated, but you may like it if you have a Mac:

http://www.amazon.com/Learning-Unix-OS-Going-Terminal/dp/1449332315/ref=sr_1_1?s=books&ie=UTF8&qid=1418694791&sr=1-1&keywords=OS+X+unix

This wiki is also good. Many devs post on it:

https://theiphonewiki.com/wiki/Main_Page