Consider App Extension environment

Example/Podfile

@@ -12,4 +12,6 @@ target 'RxKeyboardExample' do
   pod 'SwiftyColor'
   pod 'SwiftyImage'
   pod 'CGFloatLiteral'
+
+  target 'RxKeyboardShareExtension'
 end

Example/Podfile.lock

@@ -4,7 +4,7 @@ PODS:
   - ReusableKit (1.1.0)
   - RxCocoa (3.1.0):
     - RxSwift (~> 3.1)
-  - RxKeyboard (0.4.0):
+  - RxKeyboard (0.4.1):
     - RxCocoa (>= 3.0)
     - RxSwift (>= 3.0)
   - RxSwift (3.1.0)
@@ -34,14 +34,14 @@ SPEC CHECKSUMS:
   ManualLayout: 68ac8cfa6b5f656f7a9fadec3730208b95986880
   ReusableKit: 89e743a120bab0d95848bff27e481833c2768905
   RxCocoa: 50d7564866da9299161e86a263ce12a0873904d8
-  RxKeyboard: cf7f4463f27e580a3542127877ef9e3a71183744
+  RxKeyboard: 6bd1a1e1e199d869699ed8da2307b474137ec28f
   RxSwift: 83ff553e7593fdfdcb2562933a64c0284dffdadc
   SnapKit: 12b24f569cb7c143acc9c22b9d91b23e7b1c84a2
   SwiftyColor: 7fa09db14051bc5d7f539e1c4576665975225992
   SwiftyImage: 79090f8b96057b3e91064de172936b97855086e6
   Then: 8496793c8fcac95482b943909b440724c7d8d82c
   UITextView+Placeholder: 77680995fcdd07c3f52ec92fe1150874a2ac89ff
 
-PODFILE CHECKSUM: 49cf5def62bcfa2dfbe0c5118a9372a4162ec992
+PODFILE CHECKSUM: 586f03c5a1d10260c3fad008f55a493a57b525a5
 
-COCOAPODS: 1.1.1
+COCOAPODS: 1.2.1

Example/RxKeyboardShareExtension/Base.lproj/MainInterface.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11134" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="j1y-V4-xli">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11106"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--Share View Controller-->
+        <scene sceneID="ceB-am-kn3">
+            <objects>
+                <viewController id="j1y-V4-xli" customClass="ShareViewController" customModuleProvider="target" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="8bI-gs-bmD"/>
+                        <viewControllerLayoutGuide type="bottom" id="d5i-Ba-RvD"/>
+                    </layoutGuides>
+                    <view key="view" opaque="NO" contentMode="scaleToFill" id="wbc-yd-nQP">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="CEy-Cv-SGf" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

Example/RxKeyboardShareExtension/Info.plist

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>RxKeyboardShareExtension</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>XPC!</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionAttributes</key>
+		<dict>
+			<key>NSExtensionActivationRule</key>
+			<string>TRUEPREDICATE</string>
+		</dict>
+		<key>NSExtensionMainStoryboard</key>
+		<string>MainInterface</string>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.share-services</string>
+	</dict>
+</dict>
+</plist>

Example/RxKeyboardShareExtension/ShareViewController.swift

@@ -0,0 +1,53 @@
+//
+//  ShareViewController.swift
+//  RxKeyboardShareExtension
+//
+//  Created by Suyeol Jeon on 04/05/2017.
+//  Copyright © 2017 Suyeol Jeon. All rights reserved.
+//
+
+import UIKit
+import Social
+import RxKeyboard
+import RxSwift
+import SnapKit
+
+class ShareViewController: UIViewController {
+  let disposeBag = DisposeBag()
+  let textView = UITextView()
+  let toolbar = UIToolbar()
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    self.textView.font = UIFont.systemFont(ofSize: 50)
+    self.textView.text = (0...100).map { "\($0)" }.joined(separator: "\n")
+    self.textView.keyboardDismissMode = .interactive
+    self.view.addSubview(self.textView)
+    self.view.addSubview(self.toolbar)
+
+    self.textView.snp.makeConstraints { make in
+      make.edges.equalToSuperview()
+    }
+    self.toolbar.snp.makeConstraints { make in
+      make.left.right.equalToSuperview()
+      make.bottom.equalToSuperview()
+    }
+
+    // Set `gestureValue` for using interactive keyboard tracking
+    RxKeyboard.instance.gestureView = self.view
+    RxKeyboard.instance.visibleHeight
+      .drive(onNext: { [weak self] visibleHeight in
+        guard let `self` = self else { return }
+        self.toolbar.snp.updateConstraints { make in
+          make.bottom.equalTo(-visibleHeight)
+        }
+        self.view.setNeedsLayout()
+        UIView.animate(withDuration: 0) {
+          self.textView.contentInset.bottom = visibleHeight + self.toolbar.frame.height
+          self.textView.scrollIndicatorInsets.bottom = self.textView.contentInset.bottom
+          self.view.layoutIfNeeded()
+        }
+      })
+      .addDisposableTo(self.disposeBag)
+  }
+}

README.md

@@ -89,6 +89,16 @@ RxKeyboard.instance.frame
 
     > **Note**: In real world, you should use `setNeedsLayout()` and `layoutIfNeeded()` with animation block. See the [example project](https://github.com/RxSwiftCommunity/RxKeyboard/blob/master/Example/Sources/ViewControllers/MessageListViewController.swift#L92-L105) for example.
 
+- <a name="tip-app-extension" href="#tip-app-extension">🔗</a> **I want to use RxKeyboard in App Extension.**
+
+    App Extesion doesn't allow the `UIApplication.shared` API so the pan gesture recognizer cannot automatically track the interactive keybord dismissing. You have to do something manually in the App Extension target: setting `gestureView`.
+
+    ```swift
+    // ShareViewController.swift
+    RxKeyboard.instance.gestureView = self.view // add this line on `viewDidLoad()`
+    RxKeyboard.instance.visibleHeight.drive(...)
+    ```
+
 - Anything else? Please open an issue or make a Pull Request.
 
 ## Dependencies

RxKeyboard.xcodeproj/project.pbxproj

@@ -277,6 +277,7 @@
 		03A258D41DA94EC50035A85B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "";
 				DEFINES_MODULE = YES;
@@ -302,6 +303,7 @@
 		03A258D51DA94EC50035A85B /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "";
 				DEFINES_MODULE = YES;

Sources/RxKeyboard.swift

@@ -19,6 +19,17 @@ public class RxKeyboard: NSObject {
   /// Get a singleton instance.
   public static let instance = RxKeyboard()
 
+  /// A view that receives pan gesture. The default value is the AppDelegate's window. Set this
+  /// value with the root view controller's view if the target is an App Extension.
+  public var gestureView: UIView? {
+    get { return self._gestureView ?? self.application?.delegate?.window ?? nil }
+    set {
+      self._gestureView = newValue
+      self.panRecognizer.view?.removeGestureRecognizer(self.panRecognizer)
+      newValue?.addGestureRecognizer(self.panRecognizer)
+    }
+  }
+
   /// An observable keyboard frame.
   public let frame: Driver<CGRect>
 
@@ -36,6 +47,12 @@ public class RxKeyboard: NSObject {
   fileprivate let disposeBag = DisposeBag()
   fileprivate let panRecognizer = UIPanGestureRecognizer()
 
+  fileprivate let application: UIApplication? = {
+    let selector = NSSelectorFromString("sharedApplication")
+    return UIApplication.perform(selector)?.takeRetainedValue() as? UIApplication
+  }()
+  fileprivate var _gestureView: UIView?
+
 
   // MARK: Initializing
 
@@ -93,10 +110,10 @@ public class RxKeyboard: NSObject {
       .withLatestFrom(frameVariable.asObservable()) { ($0, $1) }
       .flatMap { (gestureRecognizer, frame) -> Observable<CGRect> in
         guard case .changed = gestureRecognizer.state,
-          let window = UIApplication.shared.windows.first,
+          let view = gestureRecognizer.view,
           frame.origin.y < UIScreen.main.bounds.height
         else { return .empty() }
-        let origin = gestureRecognizer.location(in: window)
+        let origin = gestureRecognizer.location(in: view)
         var newFrame = frame
         newFrame.origin.y = max(origin.y, UIScreen.main.bounds.height - frame.height)
         return .just(newFrame)
@@ -112,8 +129,9 @@ public class RxKeyboard: NSObject {
     NotificationCenter.default.rx.notification(.UIApplicationDidFinishLaunching)
       .map { _ in Void() }
       .startWith(Void()) // when RxKeyboard is initialized before UIApplication.window is created
-      .subscribe(onNext: { _ in
-        UIApplication.shared.windows.first?.addGestureRecognizer(self.panRecognizer)
+      .subscribe(onNext: { [weak self] _ in
+        guard let `self` = self else { return }
+        self.gestureView?.addGestureRecognizer(self.panRecognizer)
       })
       .disposed(by: self.disposeBag)
   }