From b65ea34945bbde0f9921e9544b07391e4e1c804b Mon Sep 17 00:00:00 2001
From: nixzhu <zhuhongxu@gmail.com>
Date: Wed, 25 Mar 2015 10:54:40 +0800
Subject: [PATCH] add state for MessageToolbar; show sendButton when have text
 input

---
 .../ConversationViewController.swift          | 12 +---
 Yep/Views/MessageToolbar/MessageToolbar.swift | 67 ++++++++++++++++++-
 2 files changed, 67 insertions(+), 12 deletions(-)

diff --git a/Yep/ViewControllers/Conversation/ConversationViewController.swift b/Yep/ViewControllers/Conversation/ConversationViewController.swift
index 38c266a6..903de122 100644
--- a/Yep/ViewControllers/Conversation/ConversationViewController.swift
+++ b/Yep/ViewControllers/Conversation/ConversationViewController.swift
@@ -77,7 +77,7 @@ class ConversationViewController: UIViewController {
 
         updateUIWithKeyboardChange = true
 
-        messageToolbar.messageTextField.delegate = self
+        //messageToolbar.messageTextField.delegate = self
     }
 
     // MARK: Private
@@ -202,14 +202,4 @@ extension ConversationViewController: UICollectionViewDataSource, UICollectionVi
     }
 }
 
-// MARK: UITextFieldDelegate
-
-extension ConversationViewController: UITextFieldDelegate {
-    func textFieldShouldReturn(textField: UITextField) -> Bool {
-
-
-        return true
-    }
-}
-
 
diff --git a/Yep/Views/MessageToolbar/MessageToolbar.swift b/Yep/Views/MessageToolbar/MessageToolbar.swift
index 361b27fd..1e01e5ec 100644
--- a/Yep/Views/MessageToolbar/MessageToolbar.swift
+++ b/Yep/Views/MessageToolbar/MessageToolbar.swift
@@ -8,9 +8,28 @@
 
 import UIKit
 
+enum MessageToolbarState {
+    case Default
+    case TextInput
+}
+
 @IBDesignable
 class MessageToolbar: UIToolbar {
 
+    var state: MessageToolbarState = .Default {
+        willSet {
+            switch newValue {
+            case .Default:
+                micButton.hidden = false
+                sendButton.hidden = true
+
+            case .TextInput:
+                micButton.hidden = true
+                sendButton.hidden = false
+            }
+        }
+    }
+
     lazy var cameraButton: UIButton = {
         let button = UIButton()
         button.setImage(UIImage(named: "item_camera"), forState: .Normal)
@@ -22,6 +41,8 @@ class MessageToolbar: UIToolbar {
         let textField = UITextField()
         textField.borderStyle = .RoundedRect
         textField.returnKeyType = .Send
+        textField.delegate = self
+        textField.addTarget(self, action: "editingChangedInTextField:", forControlEvents: UIControlEvents.EditingChanged)
         return textField
         }()
 
@@ -32,11 +53,20 @@ class MessageToolbar: UIToolbar {
         return button
         }()
 
+    lazy var sendButton: UIButton = {
+        let button = UIButton()
+        button.setTitle(NSLocalizedString("Send", comment: ""), forState: .Normal)
+        button.setTitleColor(UIColor.yepTintColor(), forState: .Normal)
+        return button
+        }()
+
     
     override func didMoveToSuperview() {
         super.didMoveToSuperview()
         
         makeUI()
+
+        state = .Default
     }
 
     func makeUI() {
@@ -50,10 +80,14 @@ class MessageToolbar: UIToolbar {
         self.addSubview(micButton)
         micButton.setTranslatesAutoresizingMaskIntoConstraints(false)
 
+        self.addSubview(sendButton)
+        sendButton.setTranslatesAutoresizingMaskIntoConstraints(false)
+
         let viewsDictionary = [
             "cameraButton": cameraButton,
             "messageTextField": messageTextField,
-            "micButton": micButton
+            "micButton": micButton,
+            "sendButton": sendButton,
         ]
 
         let constraintsV = NSLayoutConstraint.constraintsWithVisualFormat("V:|[cameraButton(==micButton)]|", options: NSLayoutFormatOptions(0), metrics: nil, views: viewsDictionary)
@@ -62,6 +96,37 @@ class MessageToolbar: UIToolbar {
 
         NSLayoutConstraint.activateConstraints(constraintsV)
         NSLayoutConstraint.activateConstraints(constraintsH)
+
+
+        let sendButtonConstraintCenterY = NSLayoutConstraint(item: sendButton, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: cameraButton, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0)
+
+        let sendButtonConstraintHeight = NSLayoutConstraint(item: sendButton, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: cameraButton, attribute: NSLayoutAttribute.Height, multiplier: 1, constant: 0)
+
+        let sendButtonConstraintsH = NSLayoutConstraint.constraintsWithVisualFormat("H:[messageTextField][sendButton(==cameraButton)]|", options: NSLayoutFormatOptions.AlignAllCenterY, metrics: nil, views: viewsDictionary)
+
+        NSLayoutConstraint.activateConstraints([sendButtonConstraintCenterY])
+        NSLayoutConstraint.activateConstraints([sendButtonConstraintHeight])
+        NSLayoutConstraint.activateConstraints(sendButtonConstraintsH)
     }
 
+
+    // Mark: TextField
+
+    func editingChangedInTextField(textfiled: UITextField) {
+        if textfiled.text.isEmpty {
+            self.state = .Default
+        } else {
+            self.state = .TextInput
+        }
+    }
 }
+
+// MARK: UITextFieldDelegate
+
+extension MessageToolbar: UITextFieldDelegate {
+
+    func textFieldShouldReturn(textField: UITextField) -> Bool {
+        return true
+    }
+}
+