Timestamped Event Matching Error: Failed to find matching element
SwiftXcodeXcode Ui-TestingSwift Problem Overview
I'm trying to generate a UItest in Xcode. When I try to swipe UIview I get an error:
Timestamped Event Matching Error: Failed to find matching element
This also happens if I try to tap UIView.
Swift Solutions
Solution 1 - Swift
You should verify that the 'Accessibility' option is enabled for the UIView object you are swiping from, for example:
Solution 2 - Swift
Usually this issue is observed when the parent element of the element yo want to record is set to isAccessibilityElement = true. In general, you have to have the parent element set to false to access the child element.
For example: if you have a UILabel inside a view, the accessibility should be set to false for the view and set to true for the UILabel.
Solution 3 - Swift
In Xcode 9.3, where this is apparently still a problem, what I did was:
- Quit Xcode
- Reset the Simulator's settings (Hardware -> Erase all contents and settings)
- Quit the Simulator
- Delete the derived data for the current app
- Restart Xcode
- Try recording again - it worked this time for me.
Solution 4 - Swift
For recording a new test, I don't think there's a solution yet. But, if you use an extension forcing tap with a test that already exists, works.
Example of use:
extension XCUIElement {
func forceTapElement() {
if self.hittable {
self.tap()
}
else {
let coordinate: XCUICoordinate = self.coordinateWithNormalizedOffset(CGVectorMake(0.0, 0.0))
coordinate.tap()
}
}
}
func testSomethingWithCells() {
let app = XCUIApplication()
let cells = app.tables.cells
sleep(1)
cells.elementBoundByIndex(0).forceTapElement()
}
You can check the original post here:
Solution 5 - Swift
I've been occasionally running into this problem. Delete the app's directory from DerivedData seems to help.
Solution 6 - Swift
A solution that worked for myself was to identify the object differently.
In Xcode 8 I was able to use the following:
XCUIApplication().tables.cells["Camera Roll"].buttons["Camera Roll"].tap()
With Xcode 9 I got the error mentioned in this question. Ended up using the following, which worked (al beit more flakey than the original option)
XCUIApplication().cells.element(boundBy: 1).tap()
Solution 7 - Swift
Even if you have Accessibility enabled for the element, you have to make sure that it has a unique accessibility identifier. In my case, I had copied & pasted a UISwitch and assigned a different outlet to it, but it kept the same accessibility ID as the original one.