Xcode Memory Graph Debugger Tips
Lines between objects have a label. A line represents a reference. Click on the label to see if the reference is strong or weak or unknown and what the source and destination are.
Don’t click on anything where the name looks something like
MagicOb(something like that). It crashes Xcode for me every time.
See also: WWDC 2016: Visual Debugging with Xcode.
