"TextField.action: A function or method that gets called when text field has finished editing."
So you could check if all textfields have a valid value, insert them to your db and clear the textfield.text

def textfield_action(self, textfield):
    # This is called after pressing RETURN
    if ...
        c.execute...
        self.tf_first.text = ''
        ...

Btw. this is an example of a own view class.

Don't know if it's still working... Workflow

Have you read all the comments in the getting started section? Here Or do you create a pyui project with a separate pyui file? Then you could write e.g. button_tapped in the Action field in the button preferences.

import ui

def button_tapped(sender):
    sender.title = 'Hello'

v = ui.load_view()
v.present('sheet')

length = len(self.view['tableview1'].data_source.items)
r = []
for i in range(1, length):
    t = tuple([0, i])
    r.append(t)
    self.view['tableview1'].selected_rows = r

TableView.selected_rows needs a sequence of selected rows, each as a 2-tuple (section, row). try (0, row)

PhoneManager
Some fixes and now with photo multiselect

How do you store your photos? New default format is HEIF and not JPEG. Maybe that‘s the reason, but I‘m not sure.

Why do you want to close a site? Typically you close the app, change a site or stop loading...
Here you find a small example look for "Webbrowser".

... or PhoneManager > Rename :)

with open('file.csv', 'r', encoding='utf-8') as f: