【转载】Pythonista ui制作学习

coding: utf-8

from future import division
import ui
import clipboard
from console import hud_alert

shows_result = False

def button_tapped(sender):
‘@type sender: ui.Button’
# Get the button’s title for the following logic:
t = sender.title
global shows_result
# Get the labels:
label = sender.superview[‘label1’]
label2 = sender.superview[‘label2’]
if t in ‘0123456789’:
if shows_result or label.text == ‘0’:
# Replace 0 or last result with number:
label.text = t
else:
# Append number:
label.text += t
elif t == ‘.’ and label.text[-1] != ‘.’:
# Append decimal point (if not already there)
label.text += t
elif t in ‘±÷×’:
if label.text[-1] in ‘±÷×’:
# Replace current operator
label.text = label.text[:-1] + t
else:
# Append operator
label.text += t
elif t == ‘AC’:
# Clear All
label.text = ‘0’
elif t == ‘C’:
# Delete the last character:
label.text = label.text[:-1]
if len(label.text) == 0:
label.text = ‘0’
elif t == ‘=’:
# Evaluate the result:
try:
label2.text = label.text + ’ =’
expr = label.text.replace(‘÷’, ‘/’).replace(‘×’, ‘*’)
label.text = str(eval(expr))
except (SyntaxError, ZeroDivisionError):
label.text = ‘ERROR’
shows_result = True
if t != ‘=’:
shows_result = False
label2.text = ‘’

def copy_action(sender):
‘@type sender: ui.Button’
t1 = sender.superview[‘label1’].text
t2 = sender.superview[‘label2’].text
if t2:
text = t2 + ’ ’ + t1
else:
text = t1
clipboard.set(text)
hud_alert(‘Copied’)

v = ui.load_view(‘Calculator’)

if min(ui.get_screen_size()) >= 768:
# iPad
v.frame = (0, 0, 360, 400)
v.present(‘sheet’)
else:
# iPhone
v.present(orientations=[‘portrait’])