Summary
axe drag fails on this machine with:
Error: CLIError(errorDescription: "FBSimulatorHIDEvent does not support touch move events.")
This is with AXe 1.7.1, Xcode 26.5, and an iOS 26.5 simulator. axe swipe / XcodeBuildMCP swipe works, but axe drag fails before dispatch because FBSimulatorHIDEvent.touchMoveAtX:y: is not available at runtime.
Reproduction
Booted simulator:
iPhone 17, iOS 26.5, UDID D24248AD-73D5-43A8-8A8E-ED3F072D74C0
Command:
/Users/agent/.npm/_npx/99336612077b7094/node_modules/xcodebuildmcp/bundled/axe \
drag \
--start-x 201 \
--start-y 477 \
--end-x 201 \
--end-y 529 \
--duration 0.2 \
--steps 10 \
--udid D24248AD-73D5-43A8-8A8E-ED3F072D74C0
Observed:
Error: CLIError(errorDescription: "FBSimulatorHIDEvent does not support touch move events.")
Expected
axe drag should either perform a drag on supported simulator stacks or gracefully fall back / explain which Xcode or SimulatorKit versions support the required touch-move selector.
Environment
From xcodebuildmcp-doctor and local commands:
AXe: 1.7.1
XcodeBuildMCP: 2.6.2
Xcode: 26.5 (17F42)
macOS: 26.5 / Darwin 25.5.0
Architecture: arm64, Apple M1 Pro
Node: v26.3.0
Installed simulator runtimes:
iOS 26.4.1 (23E254a)
iOS 26.5 (23F77)
Notes
I traced the failure to Sources/AXe/Utilities/HIDInteractor.swift, where touchMoveEvent(x:y:) looks up the private class method:
NSSelectorFromString("touchMoveAtX:y:")On this host, class_getClassMethod(FBSimulatorHIDEvent.self, selector) returns nil, causing the error above.
A possible workaround might be a fallback path using FBSimulatorHIDEvent.swipe(...) where appropriate, although that would not be equivalent to a true held touch-move drag for sliders or custom controls.
Summary
axe dragfails on this machine with:This is with AXe 1.7.1, Xcode 26.5, and an iOS 26.5 simulator.
axe swipe/ XcodeBuildMCPswipeworks, butaxe dragfails before dispatch becauseFBSimulatorHIDEvent.touchMoveAtX:y:is not available at runtime.Reproduction
Booted simulator:
Command:
Observed:
Expected
axe dragshould either perform a drag on supported simulator stacks or gracefully fall back / explain which Xcode or SimulatorKit versions support the required touch-move selector.Environment
From
xcodebuildmcp-doctorand local commands:Installed simulator runtimes:
Notes
I traced the failure to
Sources/AXe/Utilities/HIDInteractor.swift, wheretouchMoveEvent(x:y:)looks up the private class method:On this host,
class_getClassMethod(FBSimulatorHIDEvent.self, selector)returns nil, causing the error above.A possible workaround might be a fallback path using
FBSimulatorHIDEvent.swipe(...)where appropriate, although that would not be equivalent to a true held touch-move drag for sliders or custom controls.