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The Xamarin.iOS ComboBox control (drop-down) is a text box component that allows users to type a value or choose an option from a list of predefined options. It has several out-of-the-box features, such as data binding, filtering, UI customization, and custom templates.

Editable and non-editable modes

In editable mode, the combo box allows users to edit in the text box that shows the suggestion in drop-down list based on the input. Non-editable mode is used to prevent users from typing and select from drop-down list.


You can pick from various filtering options such as starts with, contains, and ends with. You can also pick whether to filter with or without case sensitivity.

Matching Text Highlight First Occurrence Support in ComboBox Control for Xamarin iOS

First occurrence

Highlights the matching text that occurs first.

Matching Text Highlight Multiple Occurrence Support in ComboBox Control for Xamarin iOS

Multiple occurrence

Highlights the matching text that occurs multiple times.

Perform Filtering When Needed with ComboBox Control

Perform filtering when needed

The combo box control starts offering matches as soon as users start typing. This feature can be changed by setting the number of characters required to start matching.

Auto fill

The combo box component has autofill option. This completes the word that users type from the suggestion text. So, the end users can search for the items easily.It suggests a list of filtered items in a pop-up or appends the rest of the suggested words in the input area. This also appends the matched item and displays the list of filtered items suggested in a pop-up at the same time.

Pop-up placement

If the control is at the bottom of the application, where the default keyboard appears and hides the pop-up, the pop-up can be placed at the top.

Pop-up Placement Options in ComboBox Control for Xamarin iOS

Multiple selection

The input field has been designed to address scenarios such as email address bars. You can select multiple items with token representation or simply divide them with a delimiter.

Multiple Selection with Token Representation Support in ComboBox Control for Xamarin iOS

Token representation

Customizable token representation allows users to remove an item with its close button.

Delimiter Support in ComboBox Control for Xamarin iOS


Selected items can be divided with desired characters such as “$” for dollar separation or ‘,’ for traditional comma separation.

UI customization

The combobox control can be thoroughly customized in the following areas.

Custom Template Support in ComboBox Control for Xamarin iOS

Custom template

The control accepts a template for pop-ups to change the look and feel of the items.

Header View and Footer View of ComboBox Control for Xamarin iOS

You can design your own header and footer for the pop-up list using the header and footer template.

Custom View in ComboBox Control for Xamarin iOS

Custom view in text area

The control accepts any custom view in the place of the text box.

Appearance Customization with ComboBox Control for Xamarin iOS


By default, the customizable appearance of the control is designed to adopt native look and feel of the deployment platform.

Color Customization with ComboBox Control for Xamarin iOS

Color customization

The color of pop-ups and text can be customized to fit the application design.

Font Size Customization with ComboBox Control for Xamarin iOS

Font size

The font size can be customized with pixel precision or with standard options, such as small, medium, and large.

Font Family Customization with ComboBox Control for Xamarin iOS

Font family

You will not be limited to use traditional fonts only, but you can also use custom fonts that suit the application. The control renders certain iconic fonts too.

General information

The combo box control provides some additional features that make it more user-friendly.

Clear Button in ComboBox Control for Xamarin iOS

Clear button

A customizable clear button is available to clear all the text in a single tap. The button can be enabled or disabled.

Shows Hint Text Using Placeholder Support in ComboBox Control for Xamarin iOS


Watermark prompts with an information hint when the search box is not in focus and contains an empty string.

MVVM with ComboBox Control for Xamarin iOS

MVVM support

Every aspect of the combobox control has been designed with MVVM pattern in mind.

Localization with ComboBox Control for Xamarin iOS


All static text can be localized with the required language.

Object Binding in ComboBox Control for Xamarin iOS

Use real-time object

Along with a list of strings, a real-time object can also be used to direct the search member to search and display.

Icons Binding in ComboBox Control for Xamarin iOS

Bind icons

The pop-up list has a provision to place an icon. A member can also be assigned to form the object.


  • Xamarin.Forms
  • Xamarin.Android
  • Xamarin.iOS
The most downloaded control (based on the nuget.org download count).

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