我正在将 IntentsExtension 和 IntentsUIExtension 用于消息传递应用程序，以允许用户使用 Siri 发送消息。
一切正常，消息发送一次，但是当显示扩展 UI 时，我在 configureView 中定义的视图显示 3 次。
这是默认的代码意图处理程序。使用此默认代码或我的自定义代码，结果是相同的。UI 扩展 IntentViewController 的 configureView 方法调用了 3 次：
class IntentHandler: INExtension, INSendMessageIntentHandling, INSearchForMessagesIntentHandling, INSetMessageAttributeIntentHandling {
override func handler(for intent: INIntent) -> Any {
// This is the default implementation. If you want different objects to handle different intents,
// you can override this and return the handler you want for that particular intent.
return self
}
// MARK: - INSendMessageIntentHandling
// Implement resolution methods to provide additional information about your intent (optional).
func resolveRecipients(for intent: INSendMessageIntent, with completion: @escaping ([INSendMessageRecipientResolutionResult]) -> Void) {
if let recipients = intent.recipients {
// If no recipients were provided we'll need to prompt for a value.
if recipients.count == 0 {
completion([INSendMessageRecipientResolutionResult.needsValue()])
return
}
var resolutionResults = [INSendMessageRecipientResolutionResult]()
for recipient in recipients {
let matchingContacts = [recipient] // Implement your contact matching logic here to create an array of matching contacts
switch matchingContacts.count {
case 2 ... Int.max:
// We need Siri's help to ask user to pick one from the matches.
resolutionResults += [INSendMessageRecipientResolutionResult.disambiguation(with: matchingContacts)]
case 1:
// We have exactly one matching contact
resolutionResults += [INSendMessageRecipientResolutionResult.success(with: recipient)]
case 0:
// We have no contacts matching the description provided
resolutionResults += [INSendMessageRecipientResolutionResult.unsupported()]
default:
break
}
}
completion(resolutionResults)
} else {
completion([INSendMessageRecipientResolutionResult.needsValue()])
}
}
func resolveContent(for intent: INSendMessageIntent, with completion: @escaping (INStringResolutionResult) -> Void) {
if let text = intent.content, !text.isEmpty {
completion(INStringResolutionResult.success(with: text))
} else {
completion(INStringResolutionResult.needsValue())
}
}
// Once resolution is completed, perform validation on the intent and provide confirmation (optional).
func confirm(intent: INSendMessageIntent, completion: @escaping (INSendMessageIntentResponse) -> Void) {
// Verify user is authenticated and your app is ready to send a message.
let userActivity = NSUserActivity(activityType: NSStringFromClass(INSendMessageIntent.self))
let response = INSendMessageIntentResponse(code: .ready, userActivity: userActivity)
completion(response)
}
// Handle the completed intent (required).
func handle(intent: INSendMessageIntent, completion: @escaping (INSendMessageIntentResponse) -> Void) {
// Implement your application logic to send a message here.
let userActivity = NSUserActivity(activityType: NSStringFromClass(INSendMessageIntent.self))
let response = INSendMessageIntentResponse(code: .success, userActivity: userActivity)
completion(response)
}
// Implement handlers for each intent you wish to handle. As an example for messages, you may wish to also handle searchForMessages and setMessageAttributes.
// MARK: - INSearchForMessagesIntentHandling
func handle(intent: INSearchForMessagesIntent, completion: @escaping (INSearchForMessagesIntentResponse) -> Void) {
// Implement your application logic to find a message that matches the information in the intent.
let userActivity = NSUserActivity(activityType: NSStringFromClass(INSearchForMessagesIntent.self))
let response = INSearchForMessagesIntentResponse(code: .success, userActivity: userActivity)
// Initialize with found message's attributes
response.messages = [INMessage(
identifier: "identifier",
content: "I am so excited about SiriKit!",
dateSent: Date(),
sender: INPerson(personHandle: INPersonHandle(value: "sarah@example.com", type: .emailAddress), nameComponents: nil, displayName: "Sarah", image: nil, contactIdentifier: nil, customIdentifier: nil),
recipients: [INPerson(personHandle: INPersonHandle(value: "+1-415-555-5555", type: .phoneNumber), nameComponents: nil, displayName: "John", image: nil, contactIdentifier: nil, customIdentifier: nil)]
)]
completion(response)
}
// MARK: - INSetMessageAttributeIntentHandling
func handle(intent: INSetMessageAttributeIntent, completion: @escaping (INSetMessageAttributeIntentResponse) -> Void) {
// Implement your application logic to set the message attribute here.
let userActivity = NSUserActivity(activityType: NSStringFromClass(INSetMessageAttributeIntent.self))
let response = INSetMessageAttributeIntentResponse(code: .success, userActivity: userActivity)
completion(response)
}
}
和用户界面代码：
class IntentViewController: UIViewController, INUIHostedViewControlling {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
// MARK: - INUIHostedViewControlling
// Prepare your view controller for the interaction to handle.
func configureView(for parameters: Set<INParameter>, of interaction: INInteraction, interactiveBehavior: INUIInteractiveBehavior, context: INUIHostedViewContext, completion: @escaping (Bool, Set<INParameter>, CGSize) -> Void) {
// Do configuration here, including preparing views and calculating a desired size for presentation.
completion(true, parameters, self.desiredSize)
}
var desiredSize: CGSize {
return self.extensionContext!.hostedViewMaximumAllowedSize
}
}
在 configureView 的完成处理程序上放置一个断点，我可以看到它被调用了 3 次。在我的应用程序中，这会导致自定义视图一个接一个地垂直堆叠出现 3 次。