# Titanium.App.iOS.SearchQuery
A search query object manages the criteria to apply when searching app content that you have previously indexed by using the Core Spotlight APIs.
# Overview
You can use this API to search multiple Titanium.App.iOS.SearchableItem objects at the same time. You can do that
by using the queryString
parameter that has a special syntax to filter and index several items. Please refer
to the official Apple documentation (opens new window) for detailed information on how to structure your search-query to get the
best possible results.
To use this feature make sure you have a compatible device running iOS 10 or later.
To create a SearchableItem object, use the Titanium.App.iOS.createSearchableItem method. Pass a dictionary of properties to the method that will help identify the item. At minimum, you must set the Titanium.App.iOS.SearchableItem.attributeSet property, which associates the metadata with the SearchableItem object.
# Examples
# Perform a simple search-query for all items that start with "Searchable" in it.
The following example demonstrates how to search a Ti.App.iOS.SearchableItem using the iOS 10 Ti.App.iOS.SearchQuery API.
# app.js
var win = Ti.UI.createWindow({
backgroundColor: "#fff"
});
var btn = Ti.UI.createButton({
title: "Start search-query"
});
var searchItems = [];
var itemAttr = Ti.App.iOS.createSearchableItemAttributeSet({
itemContentType: Ti.App.iOS.UTTYPE_IMAGE,
title: "Titanium Core Spotlight Tutorial"
});
itemAttr.contentDescription = "Tech Example \nOn: " + String.formatDate(new Date(), "short");
itemAttr.keywords = ["Mobile", "Appcelerator", "Titanium"];
itemAttr.displayName = "Hello world";
var item = Ti.App.iOS.createSearchableItem({
uniqueIdentifier: "my-id",
domainIdentifier: "com.mydomain",
attributeSet: itemAttr
});
searchItems.push(item);
var indexer = Ti.App.iOS.createSearchableIndex();
indexer.addToDefaultSearchableIndex(searchItems, function(e) {
if (e.success) {
Ti.API.info("Press the home button and now search for your keywords");
} else {
alert("Searchable index could not be created: " + JSON.stringify(e.error));
}
});
btn.addEventListener("click", function() {
// An array of found Ti.App.iOS.SearchableItem's
var allItems = [];
// The search-query
var searchQuery = Ti.App.iOS.createSearchQuery({
queryString: 'title == "Titanium*"',
attributes: ["title", "displayName", "keywords", "contentType"]
});
// The event to be called when a new batch of items is found
searchQuery.addEventListener("founditems", function(e) {
for (var i = 0; i < e.items.length; i++) {
allItems.push(e.items[i]);
}
});
// The event to be called when the search-query completes
searchQuery.addEventListener("completed", function(e) {
if (!e.success) {
alert(e.error);
}
for (var i = 0; i < allItems.length; i++) {
var attributeSet = allItems[i].attributeSet
var foundTitle = attributeSet.title
var foundDisplayName = attributeSet.displayName
Ti.API.info("title: " + foundTitle + ", displayName: " + foundDisplayName);
}
});
// Start the search-query (or use searchQuery.cancel()) to abort it
searchQuery.start();
});
win.add(btn);
win.open();
# Properties
# apiName READONLY
The name of the API that this proxy corresponds to.
The value of this property is the fully qualified name of the API. For example, Titanium.UI.Button
returns Ti.UI.Button
.
# attributes
An array of strings that represent the attributes of indexed items.
Each string corresponds to a property name that can be set for an item. For a list of possible properties, see the Titanium.App.iOS.SearchableItemAttributeSet API. Passing null for this parameter means that the query does not use attributes to find matching items.
# bubbleParent
Indicates if the proxy will bubble an event to its parent.
Some proxies (most commonly views) have a relationship to other proxies, often established by the add() method. For example, for a button added to a window, a click event on the button would bubble up to the window. Other common parents are table sections to their rows, table views to their sections, and scrollable views to their views. Set this property to false to disable the bubbling to the proxy's parent.
Default: true
# queryString CREATION ONLY
A formatted string that defines the matching criteria to apply to indexed items.
This parameter cannot be null.
# Methods
# addEventListener
Adds the specified callback as an event listener for the named event.
Parameters
Name | Type | Description |
---|---|---|
name | String | Name of the event. |
callback | Callback<Titanium.Event> | Callback function to invoke when the event is fired. |
Returns
- Type
- void
# applyProperties
Applies the properties to the proxy.
Properties are supplied as a dictionary. Each key-value pair in the object is applied to the proxy such that myproxy[key] = value.
Parameters
Name | Type | Description |
---|---|---|
props | Dictionary | A dictionary of properties to apply. |
Returns
- Type
- void
# fireEvent
Fires a synthesized event to any registered listeners.
Parameters
Name | Type | Description |
---|---|---|
name | String | Name of the event. |
event | Dictionary | A dictionary of keys and values to add to the Titanium.Event object sent to the listeners. |
Returns
- Type
- void
# isCancelled
A Boolean value that indicates if the query has been cancelled (true
) or not (false
).
Returns
Returns true
if the query was cancelled.
- Type
- Boolean
# removeEventListener
Removes the specified callback as an event listener for the named event.
Multiple listeners can be registered for the same event, so the
callback
parameter is used to determine which listener to remove.
When adding a listener, you must save a reference to the callback function in order to remove the listener later:
var listener = function() { Ti.API.info("Event listener called."); }
window.addEventListener('click', listener);
To remove the listener, pass in a reference to the callback function:
window.removeEventListener('click', listener);
Parameters
Name | Type | Description |
---|---|---|
name | String | Name of the event. |
callback | Callback<Titanium.Event> | Callback function to remove. Must be the same function passed to |
Returns
- Type
- void
# start
Asynchronously queries the index for items that match the query object's specifications.
Returns
- Type
- void
# Events
# founditems
Fired when the query finds a new batch of matching items.
Properties
Name | Type | Description |
---|---|---|
items | Array<Titanium.App.iOS.SearchableItem> | An array of indexed items that match the specified query. |
foundItemsCount | Number | The number of items that are currently fetched. |
source | Object | Source object that fired the event. |
type | String | Name of the event fired. |
bubbles | Boolean | True if the event will try to bubble up if possible. |
cancelBubble | Boolean | Set to true to stop the event from bubbling. |
# completed
Fired when the query completes to inform you about it's success.
To receive items, use the founditems
event.
Properties
Name | Type | Description |
---|---|---|
success | Boolean | Indicates if the operation succeeded. Returns true if download succeeded, false otherwise. |
error | String | Error message, if any returned. Undefined otherwise. |
source | Object | Source object that fired the event. |
type | String | Name of the event fired. |
bubbles | Boolean | True if the event will try to bubble up if possible. |
cancelBubble | Boolean | Set to true to stop the event from bubbling. |