Useful Diagrams for iOS development:
iPhoneDev – Great classes and tutorials here.
Ray Wenderlich Tutorials – You can find awesome tutorials here.
WeHeartSwift – Really nice tutorials here.
AppCoda – You can find all kinds of stuff here, that includes Swift Codes.
Here are some nice links to read up about troubleshooting EXC_BAD_ACCESS and memory leakage 🙂
I hope you won’t have to ever use them 😀