Trying to make an alert with python and objc

[BooCocky]

Ok im at work right now but when I get home I should be able to upload this objc python wrapper ive been working on.

I dont know objc,  but imagine that all the classes are wrapped using libobjc.dylib.  Does this look right for an alert?

import objc


NSAutoreleasePool = objc.objc_getClass('NSAutoreleasePool')
pool = objc.objc_msgSend(NSAutoreleasePool, objc.sel_registerName('alloc'))
pool = objc.objc_msgSend(pool, objc.sel_registerName('init'))

UIAlertView = objc.objc_getClass('UIAlertView')
Alert = objc.objc_msgSend(UIAlertView, objc.sel_registerName('initWithTitle:'))



objc.objc_msgSend(pool, objc.sel_registerName('show'))
objc.objc_msgSend(pool, objc.sel_registerName('release'))


I know im missing a few things in "Alert" but i figured it would atleast pop up a blank alert box.  Anyone with python and objc knowledge have an idea why it wont work?  I dont get any errors it just doesnt show an alert.

[8BitAce]

I don't know any python, but looking at your second to last line, you're sending -show to an NSAutoreleasePool. I think you meant Alert. Also, you seem to be releasing the pool too soon, but maybe I'm wrong.

[C0deH4cker]

Yeah just try changing the [pool show] to [Alert show] (why do you use uppercase lol?)

[BooCocky]

Yea I tried that and it didn't work,  I think im going to have to add some fields to Alert.  I dont know why i used uppercase lol.  Maybe it looked more like objc at the time.  Sorry I never uploaded it,  im going to try and get it on a google code project today though then maybe someone could try it.   

[H4CK3R]

I'm not sure why it doesn't work, but I'll change what I can see is wrong.



import objc


NSAutoreleasePool = objc.objc_getClass('NSAutoreleasePool')
pool = objc.objc_msgSend(NSAutoreleasePool, objc.sel_registerName('alloc'))
pool = objc.objc_msgSend(pool, objc.sel_registerName('init'))

UIAlertView = objc.objc_getClass('UIAlertView')
Alert = objc.objc_msgSend(UIAlertView, objc.sel_registerName('initWithTitle: message: delegate: cancelButtonTitle: otherButtonTitles:'), "Announcement", "It turns out that you are playing Addicus!", nil, "OK", nil)
objc.objc_msgSend(Alert, objc.sel_registerName('show'))

objc.objc_msgSend(pool, objc.sel_registerName('release'))



I'm using this as my reference, http://stackoverflow.com/questions/10289890/how-to-write-ios-app-purely-in-c/10290255#10290255
It uses sel_getUid("") where you use sel_registerName(""). But I'm taking it for this that both work.

[BooCocky]

Wow thanks for that, i tried it and it ran without errors but no alert.  Then I changed sel_registerName to sel_getUid and still nothing.  Must have something to do with dyld_cache.   I can still use it for CLI but I dont think we will ever be able to interact with iOS UI with python again.  Back to the drawing board.  Ill still upload objc though.

[C0deH4cker]

How are you running your script? Just from the console or as an app?

[H4CK3R]

How are you running your script? Just from the console or as an app?

Yeah, that is my next idea. Is the UIKit framework even loaded when you run this?

[BooCocky]

Im just running as a script,  although in stackoverflow they loaded the UIKit framework but never used it.  This is the code I found that gave me the idea

import ctypes
import ctypes.util

# Need to do this to load the NSSpeechSynthesizer class, which is in AppKit.framework
appkit = ctypes.cdll.LoadLibrary(ctypes.util.find_library('AppKit'))
objc = ctypes.cdll.LoadLibrary(ctypes.util.find_library('objc'))

objc.objc_getClass.restype = ctypes.c_void_p
objc.sel_registerName.restype = ctypes.c_void_p
objc.objc_msgSend.restype = ctypes.c_void_p
objc.objc_msgSend.argtypes = [ctypes.c_void_p, ctypes.c_void_p]

# Without this, it will still work, but it'll leak memory
NSAutoreleasePool = objc.objc_getClass('NSAutoreleasePool')
pool = objc.objc_msgSend(NSAutoreleasePool, objc.sel_registerName('alloc'))
pool = objc.objc_msgSend(pool, objc.sel_registerName('init'))

NSSpeechSynthesizer = objc.objc_getClass('NSSpeechSynthesizer')
availableVoices = objc.objc_msgSend(NSSpeechSynthesizer, objc.sel_registerName('availableVoices'))

count = objc.objc_msgSend(availableVoices, objc.sel_registerName('count'))
voiceNames = [
  ctypes.string_at(
    objc.objc_msgSend(
      objc.objc_msgSend(availableVoices, objc.sel_registerName('objectAtIndex:'), i),
      objc.sel_registerName('UTF8String')))
  for i in range(count)]
print voiceNames

objc.objc_msgSend(pool, objc.sel_registerName('release'))


So Ill try that and see what happens.

[BooCocky]

Yea it looks like adding UIKit something:

[BooCocky]

Yea it looks like adding UIKit something:


2012-08-17 10:28:41.946 python[23710:707] +[U
IAlertView initWithTitle:]: unrecognized sele
ctor sent to class 0x3eb8a438
2012-08-17 10:28:41.963 python[23710:707] ***
 Terminating app due to uncaught exception 'N
SInvalidArgumentException', reason: '+[UIAler
tView initWithTitle:]: unrecognized selector
sent to class 0x3eb8a438'
*** First throw call stack:
(0x325df88f 0x34635259 0x325e292f 0x325e1915
0x3253c650 0x381834 0x1f00a4 0x1e7f8c 0x1052c
 0xd9d24 0xddcfc 0x3b698 0x1052c 0x19f78 0x10
52c 0x82b9c 0x1052c 0xda4b0 0xddcfc 0xde4cc 0
x1092dc 0x109580 0x115fa0 0x1f80 0x1ecc 0x1d6

terminate called throwing an exceptionAbort t
rap: 6

maybe i did initWithTitle wrong

[H4CK3R]

Did you try my code?
It has no -initWithTitle method name it's "initWithTitle: message: delegate: cancelButtonTitle: otherButtonTitles:"

[C0deH4cker]

Boo: try running it as an app.

Make a new folder in /Applications/ called py.app

In py.app, copy/paste the Info.plist from another app. Change the bundle identifier to com.boococky.pyapp and the cfbundleexecutable to "app.sh"

Make a file "app.sh" with this:

Code: [Select]

#!/bin/bash
exec "$(dirname "$0")"/python app.py

And make a symlink called "python" pointing to /usr/bin/python. chmod 0755 app.sh

Then, put your python code in app.py. First just try a open("/tmp/test.txt", "w").write("It works!") to verify your code gets executed. Then add your objc stuff in.


This is all from memory, so if it doesnt work, i blame it on sleepiness lol

[BooCocky]

Did you try my code?
It has no -initWithTitle method name it's "initWithTitle: message: delegate: cancelButtonTitle: otherButtonTitles:"

Yea,  No dice

2012-08-18 06:17:11.521 python[24779:707] ***
 Terminating app due to uncaught exception 'N
SInvalidArgumentException', reason: '+[UIAler
tView initWithTitle: messege: delegate: cance
lButtonTitle:]: unrecognized selector sent to
 class 0x3eb8a438'

Isnt initWithTitle an instance method and not a class method?

Boo: try running it as an app.

Make a new folder in /Applications/ called py.app

In py.app, copy/paste the Info.plist from another app. Change the bundle identifier to com.boococky.pyapp and the cfbundleexecutable to "app.sh"

Make a file "app.sh" with this:

Code: [Select]

#!/bin/bash
exec "$(dirname "$0")"/python app.py

And make a symlink called "python" pointing to /usr/bin/python. chmod 0755 app.sh

Then, put your python code in app.py. First just try a open("/tmp/test.txt", "w").write("It works!") to verify your code gets executed. Then add your objc stuff in.


This is all from memory, so if it doesnt work, i blame it on sleepiness lol

Ok good idea,  I downloaded the HelloPython.app from sauriks index of debs and i can probably use that after modifying.  I didnt even think about putting a test script in the app to see if it actually executed the code though Im gonna do it right now.

[BooCocky]

The test ran fine,  "it works!" lol. The app crashes if I try the alert.  So I changed initWithTitle to alloc just to see what happens and now I get a different error:

2012-08-18 09:20:12.110 python[25291:707] Req
uesting the window of a view (<UIAlertView: 0
x269830; frame = (0 0; 0 0); transform = [0,
0, 0, 0, 0, 0]; alpha = 0; opaque = NO; layer
 = (null)>) with a nil layer. This view proba
bly hasn't received initWithFrame: or initWit
hCoder:.

So,  I think its just a syntax error.