Visual Studio App Center Test is the next generation of Xamarin Test Cloud! Read the blog post.

Using the Accessibility ID in Test Cloud

Finding Views with AppQuery.Marked

PDF for offline use
Related Articles:
Related APIs:

Let us know how you feel about this

Translation Quality



One powerful way to reference controls in Calabash and Xamarin.UITests is to use the marked parameter or the AppQuery.Marked method. This method will locate views on the screen using the accessibility identifier or the accessibility label of the UIView. The accessibility identifier should be a string that is unique to each view on a given screen. This will make it much easier locate and interact with views during an automated test.

This recipe will discuss how to set in an iOS application and provide an example of how to use it in both Calabash and UITest.

Setting the Accessibility Identifier

There are two ways to set the accessibility identifier in iOS:

  • Programmatically – The accessibility identifier can be set in code.
  • Using Interface Builder – It is possible to set user attributes like the accessibility identifier can be added to a view using the XCode Inteface builder.

Setting the Accessibility ID Programatically

The AccessibilityIdentifier is bound by modern versions of Xamarin.iOS. In your C# code you may set the value like so:

view.AccessibilityIdentifier = "CreditCardTextField";

The ViewDidLoad event is a logical place to set the AccessibilityIdentifier property.

Using the Xcode Interface Builder

It is possible to set the accessibilityIdentifier using the Xcode Interface Builder. To do so, open up the storyboard (or XIB) in Xcode, and follow these steps:

  1. Select the view.
  2. In the Inspector Pane, select the Identity tab.
  3. Add a new User Defined Runtime Attribute named accessibilityIdentifer of type String. Set the value to what ever you would like the accessibility identifier to be.

Using the Accessibility Identifier

As described above, the accessibility identifier is a useful property for uniquely identifying views.

Using the Accessibility Identifier in UITest

The following snippet shows how to query for the UITextView that was added by the code above using the Xamarin.UITest REPL:

>>> app.Query(c=>c.Marked("CreditCardTextField"))
Query for Marked("CreditCardTextField") gave 1 results.
    "Id": "CreditCardTextField",
    "Description": "<UITextView: 0x7d2e5c00; frame = (10 120; 300 40); text = ''; clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7c0807b0>; layer = <CALayer: 0x7c080100>; contentOffset: {0, -64}>",
    "Rect": {
      "Width": 300.0,
      "Height": 40.0,
      "X": 10.0,
      "Y": 120.0,
      "CenterX": 160.0,
      "CenterY": 140.0
    "Label": null,
    "Text": "",
    "Class": "UITextView",
    "Enabled": false

Using the Accessibility Identifier in Calabash

The following snippet shows how to query for a UITextView using Calabash:

irb(main):012:0> query "UITextView marked:'CreditCardTextField'"
    [0] {
               "text" => "",
               "rect" => {
            "center_x" => 160,
                   "y" => 120,
               "width" => 300,
                   "x" => 10,
            "center_y" => 140,
              "height" => 40
        "description" => "<UITextView: 0x7d25c600; frame = (10 120; 300 40); text = ''; clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7c01bad0>; layer = <CALayer: 0x7c00ac40>; contentOffset: {0, -64}>",
                 "id" => "CreditCardTextField",
              "label" => nil,
              "class" => "UITextView",
              "frame" => {
                 "y" => 120,
             "width" => 300,
                 "x" => 10,
            "height" => 40

Xamarin Workbook

If it's not already installed, install the Xamarin Workbooks app first. The workbook file should download automatically, but if it doesn't, just click to start the workbook download manually.