如何用pywinauto控制UpDown spinner控件？报错求助

1. Resolve ElementNotFoundError #

Your first error stems from using an incorrect auto_id in the code. The control info shows the spinner's auto_id is 68226, but your initial code uses 7995854. Correcting this will let pywinauto locate the control properly.

2. Fix NoPatternInterfaceError #

UpDown controls typically expose the RangeValue pattern instead of the Value pattern. Use iface_range_value to access and modify the control's value:

Working Code Example #

from pywinauto.application import Application

app = Application("uia").start('smcg2gui.exe')
main_window = app.PololuSimpleMotorControlCenterG2

# Wait for the window to load completely (prevents timing issues)
main_window.wait('ready')

# Control the Stop motor button (already functional)
stop_motor = main_window.child_window(title="Stop motor", auto_id="stopMotorButton", control_type="Button")

# Locate the spinner with the correct auto_id
speed_controller = main_window.child_window(title="Spinner", auto_id="68226", control_type="Spinner")

# Retrieve current spinner value
current_value = speed_controller.iface_range_value.CurrentValue
print(f"Current spinner value: {current_value}")

# Set a new value (ensure it falls within the control's min/max range)
speed_controller.iface_range_value.SetValue(50)

stop_motor.click()
print("done")

Alternative Methods if RangeValue Pattern Fails #

If the above approach doesn't work, try these workarounds:

Option 1: Simulate Up/Down Button Clicks #

Manually click the spinner's up/down arrows to adjust values:

# Click the up arrow (adjust coordinates based on your control's size)
speed_controller.click_input(button='left', coords=(10, 5))
# Click the down arrow
speed_controller.click_input(button='left', coords=(10, 15))

Option 2: Interact with the Linked Edit Control #

Most spinners are paired with an Edit control. Locate it using print_control_identifiers() and set its text directly:

# Uncomment to list all control identifiers and find the Edit control
# main_window.print_control_identifiers()

speed_edit = main_window.child_window(auto_id="YOUR_EDIT_AUTO_ID", control_type="Edit")
speed_edit.set_text("75")
speed_edit.type_keys("{ENTER}") # Confirm the input

Key Notes #

• Always use print_control_identifiers() to verify control details like auto_id and title.
• Add window waits (wait('visible') or wait('ready')) to avoid issues with unloaded UI elements.

内容的提问来源于stack exchange，提问作者Omer