rpanichkin / lldb-cheatlist

LLDB most used commands cheatlist

LLDB most used commands cheatlist

• print description:

po self.var

• make changes just for debugging:

expression self.var = false

• declare a variable (only visible in LLDB):

e NSString *$globalConstant = @"What's up"

• Set one breakpoint that enables another: put that in the expression command in the debugger line of the breakpoint:

breakpoint set --one-shot true --name "-[UILabel setText:]"

• Symbolic breakpoints - to print arguments use:

po $arg1 - is receiver

po (SEL)$arg2 - is the selector

po $arg3 - is the first argument

• Move the instruction pointer by dragging it. Or using LLDB:

thread jump --by 2 - move to lines forward

thread jump 100 - move to line 23

thread return - instantly executes returns, rest of the method doesn't get executed

In the variable navigator, you can set 'Watch' which will auto-break when the variable is changed. Using LLDB:

watchpoint set variable _currentModel->_title

watchpoint list - list of watchpoints

watchpoint delete 1 - delete watchpoint at the position 1 in watpoints list

• Print recursive description of view (with all subviews)

po [self.view recursiveDescription]

• Make the screen redraw after editing frames, etc.

e (void)[CATransaction flush]

Commands from Chisel

https://github.com/facebook/chisel

• Open a UIImage, CGImageRef, UIView, CALayer, NSData (of an image), UIColor, CIColor, or CGColorRef in Preview.app on your Mac.

visualize self.searchBar

• Show or hide the given view or layer. You don't even have to continue the process to see the changes!

show/hide self.view

• Alias for (void)[CATransaction flush]

caflush

• And much more, check out Chisel repo