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Hi Pythonista crew

I try to change a Imageview height by his name.
But "ui.Imageview('Image').height = 120" is not working
So how would you try to change something in a ui.Button or ui.Imageview if you use the
Ui.Button.name. = 'button'

This my script:

view = ui.View()
view.present('portrait')

def button():
ui.Imageview('Image').height = 120

img = ui.ImageView()
img.name = 'Veer'
img.heigt = 150
view.add_subview(img)

button = ui.Button()
button.action = button
view.add_subview(button)

@RMurtsoo I am going to try an explain why this hasn't worked for you with out actually giving you a direct answer, not because I am trying to be rude/annoying but it is in my honest belief that we don't learn very well when just given an answer. So if this does come across as rude or demeaning I appologise.
So to pull your code apart

view = ui.View()  # this is correct however you might want to consider setting a frame size. `view = ui.View(frame=(0,0,width,height))` as the default is less than 200/200 from memory
view.present('portrait')  # from documentation `ui.View.present(style='default', animated=True, popover_location=None, hide_title_bar=False, title_bar_color=None, title_color=None, orientations=None)` therefore if you want to force a orientation you need to provide values for `orientations` not `style` http://omz-software.com/pythonista/docs/ios/ui.html#ui.View.present

def button():  # `ui.Button` actions require a sender argument, ie `def button(sender):...` where `sender` can be named anything
    ui.Imageview('Image').height = 120  # this creates a new `ui.ImageView` and doesn't actually reference any view from you `view` variable in the global stack. This is why you `ui.ImageView` height is not changing. Consider reading the documentation and examples to see how this is done

img = ui.ImageView()  # this is correct however you might want to set a new frame size here as the default is 0/0. Which cause also be an attributing reason to why you aren't seeing anything. `ui.ImageView(frame=(0,0,200,200)` or you can set it later with `img.width`, `img.height`, `img.x` and `img.y`
img.name = 'Veer'
img.heigt = 150  # I'm going to assume that this is just a typo
view.add_subview(img)

button = ui.Button()  # by naming the variable of this object to `button` you have overrided the method by the same name, thus you will get a `Exception` when tapping the button. Consider renaming either the method name to something else or renaming this variable to something else.
button.action = button
view.add_subview(button)

I would highly recommend reading the documentation for Pythonista, and for Python. Out of curiosity which version of Pythonista are you using?

Pythonista 3

Thanks for Your input. And cange my script to:

import ui
tel = 0
view=ui.View(frame=(0, 0, 300, 300), background_color=None, name='view')
def omdat(sender):
global tel
if tel==0:
view['Veer'].height = 120
tel = 1
elif tel == 1:
view['Veer'].height = 50
tel = 0

img = ui.ImageView(frame=(0, 100, 50, 50), background_color=(.54, .7, 1.0),name = 'Veer')
view.add_subview(img)

btn = ui.Button(frame=(200, 100, 50, 50), background_color=(.54, .3, 1.0),name = 'btn')
btn.action = omdat
view.add_subview(btn)

view.present(style='full_screen', animated=False, hide_title_bar=False, orientations='portrait')

Is my understanding good if u use style='full_screen' and orientations='portrait' your iPad screen stars in portrait?

r

def omdat(sender):
    global tel
    view['Veer'].height = 50 if tel else 120
    tel = not tel