Add present and dismiss commands for UIViewController

[alanzeino]

How I tested:

(lldb) expr UIViewController *$avc = (UIViewController *)[[UIViewController alloc] init]
(lldb) dismiss $avc
Traceback (most recent call last):
  File "/Users/alan/repositories/github/chisel/fblldb.py", line 79, in runCommand
    command.run(args, options)
  File "/Users/alan/repositories/github/chisel/commands/FBDisplayCommands.py", line 235, in run
    viewControllerHelpers.dismissViewController(args[0])
  File "/Users/alan/repositories/github/chisel/fblldbviewcontrollerhelpers.py", line 37, in dismissViewController
    raise Exception('Argument must be presented')
Exception: Argument must be presented
(lldb) present $avc
(lldb) c
Process 8420 resuming
(lldb) present $avc
Traceback (most recent call last):
  File "/Users/alan/repositories/github/chisel/fblldb.py", line 79, in runCommand
    command.run(args, options)
  File "/Users/alan/repositories/github/chisel/commands/FBDisplayCommands.py", line 221, in run
    viewControllerHelpers.presentViewController(args[0])
  File "/Users/alan/repositories/github/chisel/fblldbviewcontrollerhelpers.py", line 24, in presentViewController
    raise Exception('Argument is already presented')
Exception: Argument is already presented
(lldb) dismiss $avc
(lldb) c

[kastiglione]

The (id) cast after the && should be (BOOL).

[alanzeino]

Updated!

[kastiglione]

🚢

[kastiglione]

Thanks Xzibit

[joshavant]

Any thoughts on whether it's presently possible to push a view controller from a specific UINavigationController instance vs presenting it via UIViewController.present()?

[alanzeino]

As in, to push it onto a specific UINavigationController?

It's doable, but the question is do we want a command that takes two arguments because I can't see it working without something like this:

push $nc $vc
pop $vc

(where $nc is the navigation controller and $vc is the view controller)

pop can probably omit the $nc I guess.

[joshavant]

Yes.

The use case here is that I'm trying to present a specific View Controller for debugging, as close as possible to how it would organically be presented in the app. In this particular case, the VC I'm debugging is presented in a UINavigationController (inside of a UITabBarController).

Chisel's present appears to rely on UIViewController.present() to drive its presentation, which, in practice, is different than how the VC I'm debugging will organically be presented, slightly reducing the utility of present for debugging.

If this is out-of-scope for the framework, perhaps the solution here is just dropping into the Swift REPL to accomplish this.