Add function calling tip

Author: daymxn

firebaseai/FirebaseAIExample.xcodeproj/project.pbxproj

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		0E5E76732EB2B47400E6B3CF /* TipView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E5E76722EB2B47000E6B3CF /* TipView.swift */; };
+		0E5E76742EB2B47400E6B3CF /* TipView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E5E76722EB2B47000E6B3CF /* TipView.swift */; };
 		0ECE3A982EB286120072EC6A /* Color+Hex.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0ECE3A972EB2860C0072EC6A /* Color+Hex.swift */; };
 		0ECE3A992EB286120072EC6A /* Color+Hex.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0ECE3A972EB2860C0072EC6A /* Color+Hex.swift */; };
 		0ECE3A9B2EB286B90072EC6A /* ApplicationError.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0ECE3A9A2EB286AD0072EC6A /* ApplicationError.swift */; };
@@ -125,6 +127,7 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		0E5E76722EB2B47000E6B3CF /* TipView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TipView.swift; sourceTree = "<group>"; };
 		0ECE3A972EB2860C0072EC6A /* Color+Hex.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Color+Hex.swift"; sourceTree = "<group>"; };
 		0ECE3A9A2EB286AD0072EC6A /* ApplicationError.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ApplicationError.swift; sourceTree = "<group>"; };
 		0EE94F112E9599B800CEFD69 /* AudioBufferHelpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AudioBufferHelpers.swift; sourceTree = "<group>"; };
@@ -250,6 +253,7 @@
 		0EE94F222E9599B800CEFD69 /* Views */ = {
 			isa = PBXGroup;
 			children = (
+				0E5E76722EB2B47000E6B3CF /* TipView.swift */,
 				0EE94F1D2E9599B800CEFD69 /* ConnectButton.swift */,
 				0EE94F1E2E9599B800CEFD69 /* LiveErrorDetailsView.swift */,
 				0EE94F1F2E9599B800CEFD69 /* LiveErrorView.swift */,
@@ -644,6 +648,7 @@
 				0EE94F2D2E9599B800CEFD69 /* LiveErrorView.swift in Sources */,
 				0EE94F2E2E9599B800CEFD69 /* Microphone.swift in Sources */,
 				0EE94F2F2E9599B800CEFD69 /* LiveErrorDetailsView.swift in Sources */,
+				0E5E76742EB2B47400E6B3CF /* TipView.swift in Sources */,
 				0EE94F302E9599B800CEFD69 /* AudioController.swift in Sources */,
 				0EE94F312E9599B800CEFD69 /* AudioBufferHelpers.swift in Sources */,
 				86BB55F02E8B2D6D0054B8B5 /* GenerateContentScreen.swift in Sources */,
@@ -685,6 +690,7 @@
 				0EE94F3C2E9599B800CEFD69 /* LiveErrorView.swift in Sources */,
 				0EE94F3D2E9599B800CEFD69 /* Microphone.swift in Sources */,
 				0EE94F3E2E9599B800CEFD69 /* LiveErrorDetailsView.swift in Sources */,
+				0E5E76732EB2B47400E6B3CF /* TipView.swift in Sources */,
 				0EE94F3F2E9599B800CEFD69 /* AudioController.swift in Sources */,
 				0EE94F402E9599B800CEFD69 /* AudioBufferHelpers.swift in Sources */,
 				886F95D52B17BA010036F07A /* GenerateContentScreen.swift in Sources */,

firebaseai/LiveAudioExample/Screens/LiveAudioScreen.swift

@@ -39,6 +39,9 @@ struct LiveAudioScreen: View {
       if let error = viewModel.error {
         LiveErrorView(error: error)
       }
+      if !viewModel.hasTranscripts {
+        TipView(text: "Try asking the model to change the background color")
+      }
       ConnectButton(
         state: viewModel.state,
         onConnect: viewModel.connect,

firebaseai/LiveAudioExample/ViewModels/LiveViewModel.swift

@@ -41,6 +41,9 @@ class LiveViewModel: ObservableObject {
   @Published
   var backgroundColor: Color? = nil
 
+  @Published
+  var hasTranscripts: Bool = false
+
   private var model: LiveGenerativeModel?
   private var liveSession: LiveSession?
 
@@ -91,6 +94,7 @@ class LiveViewModel: ObservableObject {
 
     state = .connecting
     transcriptViewModel.restart()
+    hasTranscripts = false
 
     do {
       liveSession = try await model.connect()
@@ -234,6 +238,7 @@ class LiveViewModel: ObservableObject {
   }
 
   private func appendAudioTranscript(_ transcript: String) {
+    hasTranscripts = true
     transcriptViewModel.appendTranscript(transcript)
   }
 

firebaseai/LiveAudioExample/Views/TipView.swift

@@ -0,0 +1,31 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import SwiftUI
+
+struct TipView: View {
+  let text: String
+
+  var body: some View {
+    VStack(alignment: .leading, spacing: 5) {
+      Label("Tip", systemImage: "info.circle").bold().foregroundStyle(.blue)
+      Text(text)
+        .font(.caption).italic()
+    }
+  }
+}
+
+#Preview {
+  TipView(text: "Try asking the model to change the background color")
+}