I'm a iOS developer that recently got interested in RE. Reading the book you've written is amazing, but I would like to ask a couple of questions.
First would be: is the RE process of a pure Obj-C app similar to the one for a Obj-C + Swift app? Are the two processes different at all?
Second: class-dump is working just with Obj-C, is there a similar tool that works with Swift as well?
Finally: I tried setting up Theos as shown in the book but when I come to the "setting up CydiaSubstrate", I'm missing the "/opt/theos/bin/bootstrap.sh". Is this step mandatory? I was able to create a Theos project nonetheless.
I'm looking so much forward learning more about iOS RE!