Command line Cocoa

Command line Cocoa is a collection of notes about and scripts for doing iOS development from the command line.

Installing onto the simulator

Installing and running an app on the simulator can be achieved from the command line.

runsim is a script to do so. More about the script is here http://psellos.com/ios/iossim-command-line.html

installsim is a script to install an entire .app package onto the simulator. I got the idea from here: http://stackoverflow.com/questions/12964021/script-to-install-app-in-ios-simulator

Simulator Log Reading

It is possible to tail the simulator by opening the logs:

# Read the system log of the simulator
$ tail -f ~/Library/Logs/iOS\ Simulator/7.0.3/system.log

Imagine all of the possiblities:

# Read the system log of the simulator
$ tail -f ~/Library/Logs/iOS\ Simulator/7.0.3/system.log | grep SomeString

Debugging:

LLDB is a fantastic debugger. http://lldb.llvm.org A build of LLDB is included with Xcode.

LLDB works really nice from the command line

# Attach LLDB to a given process
$lldb   -attach-name some-app-process

# Set a breakpoint for an objc method
(lldb) br s -S fire:

# Continue to the next line in a breakpoint
(lldb)n

# Continue
(lldb)c

# Stop
(lldb)ctrl-c

# Show all breakpoints
(lldb) br list

# Disable all breakpoints
(lldb) br disable

# Enable all breakpoints
(lldb) br enable

There is also a lldb plugin for vim https://github.com/gilligan/vim-lldb