Respond to CR.

SignalMessaging/ViewControllers/AttachmentApproval/AttachmentApprovalInputAccessoryView.swift

@@ -7,7 +7,8 @@ import UIKit
 
 protocol AttachmentApprovalInputAccessoryViewDelegate: class {
     func attachmentApprovalInputUpdateMediaRail()
-    func attachmentApprovalInputEditCaptions()
+    func attachmentApprovalInputStartEditingCaptions()
+    func attachmentApprovalInputStopEditingCaptions()
 }
 
 // MARK: -
@@ -62,12 +63,7 @@ class AttachmentApprovalInputAccessoryView: UIView {
         let backgroundView = UIView()
         backgroundView.backgroundColor = UIColor.black.withAlphaComponent(0.6)
         addSubview(backgroundView)
-        backgroundView.autoPinEdge(toSuperviewEdge: .top)
-        backgroundView.autoPinEdge(toSuperviewEdge: .leading)
-        backgroundView.autoPinEdge(toSuperviewEdge: .trailing)
-        backgroundView.autoPinEdge(toSuperviewEdge: .bottom, withInset: -200)
-        backgroundView.setContentHuggingLow()
-        backgroundView.setCompressionResistanceLow()
+        backgroundView.autoPinEdgesToSuperviewEdges()
 
         currentCaptionLabel.textColor = UIColor(white: 1, alpha: 0.8)
         currentCaptionLabel.font = UIFont.ows_dynamicTypeBody
@@ -85,7 +81,13 @@ class AttachmentApprovalInputAccessoryView: UIView {
         stackView.axis = .vertical
 
         addSubview(stackView)
-        stackView.autoPinEdgesToSuperviewEdges()
+        stackView.autoPinEdge(toSuperviewEdge: .top)
+        stackView.autoPinEdge(toSuperviewEdge: .leading)
+        stackView.autoPinEdge(toSuperviewEdge: .trailing)
+        // We pin to the superview's _margin_.  Otherwise the notch breaks
+        // the layout if you hide the keyboard in the simulator (or if the
+        // user uses an external keyboard).
+        stackView.autoPinEdge(toSuperviewMargin: .bottom)
     }
 
     // MARK: - Events
@@ -94,7 +96,7 @@ class AttachmentApprovalInputAccessoryView: UIView {
         guard sender.state == .recognized else {
             return
         }
-        delegate?.attachmentApprovalInputEditCaptions()
+        delegate?.attachmentApprovalInputStartEditingCaptions()
     }
 
     // MARK: 
@@ -172,4 +174,8 @@ extension AttachmentApprovalInputAccessoryView: AttachmentCaptionToolbarDelegate
 
         delegate?.attachmentApprovalInputUpdateMediaRail()
     }
+
+    public func attachmentCaptionToolbarDidComplete() {
+        delegate?.attachmentApprovalInputStopEditingCaptions()
+    }
 }

SignalMessaging/ViewControllers/AttachmentApproval/AttachmentApprovalViewController.swift

@@ -731,7 +731,11 @@ extension AttachmentApprovalViewController: AttachmentApprovalInputAccessoryView
         updateMediaRail()
     }
 
-    public func attachmentApprovalInputEditCaptions() {
+    public func attachmentApprovalInputStartEditingCaptions() {
         isEditingCaptions = true
     }
+
+    public func attachmentApprovalInputStopEditingCaptions() {
+        isEditingCaptions = false
+    }
 }

SignalMessaging/ViewControllers/AttachmentApproval/AttachmentCaptionToolbar.swift

@@ -7,6 +7,7 @@ import UIKit
 
 protocol AttachmentCaptionToolbarDelegate: class {
     func attachmentCaptionToolbarDidEdit(_ attachmentCaptionToolbar: AttachmentCaptionToolbar)
+    func attachmentCaptionToolbarDidComplete()
 }
 
 // MARK: -
@@ -107,6 +108,7 @@ class AttachmentCaptionToolbar: UIView, UITextViewDelegate {
     lazy var textView: UITextView = {
         let textView = buildTextView()
 
+        textView.returnKeyType = .done
         textView.scrollIndicatorInsets = UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 3)
 
         return textView
@@ -189,7 +191,14 @@ class AttachmentCaptionToolbar: UIView, UITextViewDelegate {
             }
         }
 
-        return true
+        // Though we can wrap the text, we don't want to encourage multline captions, plus a "done" button
+        // allows the user to get the keyboard out of the way while in the attachment approval view.
+        if text == "\n" {
+            attachmentCaptionToolbarDelegate?.attachmentCaptionToolbarDidComplete()
+            return false
+        } else {
+            return true
+        }
     }
 
     // MARK: - Helpers