read_and_write_ui_text.py for http://omz-forums.appspot.com/pythonista/post/6704737952989184

read_and_write_ui_text.py

import ui
 
filename = 'name.txt'
 
def read_username(filename=filename):
    username = None
    try:
        with open(filename) as in_file:
            for line in in_file.readlines():
                username = line.strip() or username
    except IOError:
        pass
    return username or 'Player 1'
 
def write_username(sender, filename=filename):
    username = sender.superview['namefield'].text.strip()  # or 'Player 1'
    if username:
        with open(filename, 'w') as out_file:  
            out_file.write(username)
    
def get_username():
    textfield = ui.TextView(name='namefield')
    textfield.text = read_username()
 
    button = ui.Button(title='Save name')
    button.action = write_username
 
    root_view = ui.View(name='get_username()')
    root_view.add_subview(textfield)
    root_view.add_subview(button)
    root_view.hidden = True
    root_view.present('sheet')
 
    textfield.center = button.center = root_view.center
    textfield.height = 25
    root_view.hidden = False
    return root_view
    
root_view = get_username()
root_view.wait_modal()
username = root_view['namefield'].text
print(username)