Ui.button / inheritance issue

[m_doyle04]

Hi Guys,

I'm new to Python/Pythonista and reading through different material but I'm struggling to find examples of how to get a ui.button to change attributes of a different class object.

I have a basic example of a widget that has an Image View that should present/change a different image when the ui.button is pressed.

The error I get is "ui.button object has no attribute "view"". Obviously it's "ImView" that has the attribute "view" but I just can't seem to work out how to access the "ImView" object via the button action.

I'm sure there may be numerous issues with my beginner code but any general help would be greatly appreciated.

import appex, ui
import random

Image_One = ui.Image.named('Image_One.PNG')
Image_Two = ui.Image.named('Image_Two.JPG')
PIC_LIST = [Image_One,Image_Two]

class MyView(ui.View):
	def __init__(self):
		self.hue = 0
		self.background_color = 'white'
		self.add_subview(ImView().view)
		self.add_subview(MyHandler().sender)
		
class ImView(object):
	def __init__(self):
		self.view = ui.ImageView()
		self.view.frame = (150,0,170,110)
		self.view.background_color = 'white'
		self.view.border_color = 'black'
		self.view.border_width = 1
		self.view.image = None
	
	def add_pic(self):
		self.view.image =  PIC_LIST[random.randint(0,1)]
		
class MyHandler(object):
	def __init__(self):
		self.sender = ui.Button(frame=(0,0,150,110), title='Hit Me', action=ImView.add_pic)
		
appex.set_widget_view(MyView())```

[Phuket2]

@m_doyle04 , hi. Look I started to modify your code, but i thought It better I just write my way, well mostly.

I rarely use appex, but I think it's not that different from what I remember. But my personal feeling is it's better to write without appex in mind until you get a little more used to 'Pythonista. Just easier to debug etc.

Not saying my example below is the most correct, I tried to stay close to your code.

Anyway, I hope it helps.

import ui
#import random 
from random import choice

Image_One = ui.Image.named('iob:alert_256')
Image_Two = ui.Image.named('iob:alert_circled_256')
PIC_LIST = [Image_One,Image_Two]

class MyClass(ui.View):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)
		self.img_view = None
		self.btn = None
		
		self.make_view()
		
	def make_view(self):
		# create the ui.Image
		self.img_view = ui.ImageView(frame = (150,0,170,110),
									background_color = 'white',
									border_color = 'black',
									border_width = 1)
		# create the ui.Button
		self.btn = ui.Button(frame=(0,0,150,110),
							title='Hit Me',
							action=self.btn_hit)
		
		# add objects to the view
		self.add_subview(self.img_view)
		self.add_subview(self.btn)
		
	def btn_hit(self, sender):
		#self.img_view.image =  PIC_LIST[random.randint(0,1)]
		self.img_view.image = choice(PIC_LIST)	
		
if __name__ == '__main__':
	f = (0, 0, 400, 600)
	v = MyClass(frame = f, background_color = 'white')
	v.present(style='sheet')

[m_doyle04]

@Phuket2 You're a legend. Thank you very much! I've still got a long way to go with my learning but it's great to get help when you hit a stumbling block.

[Phuket2]

@m_doyle04 , no problems. I am sure you will be teaching me before too long.