Advanced Debugging with Xcode and LLDB
expression xxx
- As a breakpoint Debugger Command action
- To insert code when debugging
symbolic breakpoint
[UILabel setText:]
1
self.view.recursiveDescription()
expression -l objc -O -- [`self.view` recursiveDescription];
1
jumpAstronaut(animated: false)
we can modify this when debugging as below
expression jumpAstronaut(animated: false)
1
thread jump --by 1
- Here we jump one line of code
- As a breakpoint Debugger Command action
p object
-- denotes there’s no more options
debug objc_msg_send
po $arg1
selector
po (SEL)$arg2
The first parameter maybe.
po $arg3
set a tempory breakpoint
1
breakpoint set --ont-shot true --name "-[UILabel setText:]"
Here we add that as a Debugging Command of our breakpoint.
alias
command alias poc expression -l objc -O --
print address as a underlying object
po unsafeBitCast(0x7fb3afc3f400, to: ScoreboardView.self)
flush CATransaction
express CATransaction.flush()
load external scripts
1
vim ~/.lldbinit
e short for expression
we can copy and po constraints when view Debugging
shift + control + option
command + click to click through view in View debugging
override appearance item in debug bar