add a save button and indicator

Blog/Base.lproj/Main.storyboard

@@ -49,6 +49,12 @@
                                             <action selector="publishOrUnpublish:" destination="JEX-9P-axG" id="Vxe-Fp-IDn"/>
                                         </connections>
                                     </barButtonItem>
+                                    <barButtonItem style="plain" systemItem="flexibleSpace" id="gv8-wH-bFT"/>
+                                    <barButtonItem systemItem="save" id="7iR-uF-xqE">
+                                        <connections>
+                                            <action selector="save:" destination="JEX-9P-axG" id="gnN-zi-lxN"/>
+                                        </connections>
+                                    </barButtonItem>
                                     <barButtonItem style="plain" systemItem="flexibleSpace" id="dZ8-jR-S40"/>
                                     <barButtonItem title="Preview" id="uGx-Jy-rOz">
                                         <connections>
@@ -148,6 +154,7 @@
                         <outlet property="linkView" destination="D5w-s5-7oj" id="iRD-md-Gea"/>
                         <outlet property="publishBarButtonItem" destination="qEb-VA-ueB" id="biG-Yd-W5Z"/>
                         <outlet property="removeLinkButton" destination="81X-Pe-PFV" id="Rx0-IH-fzp"/>
+                        <outlet property="saveBarButtonItem" destination="7iR-uF-xqE" id="8A5-PY-EuS"/>
                         <outlet property="textView" destination="wrG-1y-ZY3" id="lvo-lm-t7Z"/>
                         <outlet property="textViewTopConstraint" destination="tUU-ig-gJV" id="Wzj-Rc-kuM"/>
                         <outlet property="toolbar" destination="YUD-Xe-6Cc" id="SIv-cT-WDD"/>

Blog/EditorViewController.m

@@ -25,6 +25,7 @@
 @property (nonatomic, weak) IBOutlet UIButton *removeLinkButton;
 @property (nonatomic, weak) IBOutlet UIToolbar *toolbar;
 @property (nonatomic, weak) IBOutlet UIBarButtonItem *publishBarButtonItem;
+@property (nonatomic, weak) IBOutlet UIBarButtonItem *saveBarButtonItem;
 @property (nonatomic, strong) Post *modifiedPost;
 @property (nonatomic, readonly, assign, getter=isDirty) BOOL dirty;
 @property (nonatomic, strong) PMKPromise *savePromise;
@@ -146,6 +147,13 @@
         item.enabled = toolbarEnabled;
     }];
     self.publishBarButtonItem.title = self.modifiedPost.draft ? @"Publish" : @"Unpublish";
+    [self configureSaveButton];
+}
+
+- (void)configureSaveButton {
+    self.saveBarButtonItem.enabled = self.dirty;
+    self.saveBarButtonItem.title = self.dirty ? @"Save" : nil;
+    [self.toolbar setItems:self.toolbar.items animated:YES];
 }
 
 - (void)viewDidLoad {
@@ -156,7 +164,8 @@
 
 - (void)viewWillAppear:(BOOL)animated {
     [super viewWillAppear:animated];
-    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(savePost) name:UIApplicationWillResignActiveNotification object:nil];
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    [notificationCenter addObserver:self selector:@selector(applicationWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];
     if ([self pasteboardHasLink]) {
         [self configureLinkView];
     }
@@ -164,7 +173,8 @@
 
 - (void)viewWillDisappear:(BOOL)animated {
     [super viewWillDisappear:animated];
-    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillResignActiveNotification object:nil];
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    [notificationCenter removeObserver:self name:UIApplicationWillResignActiveNotification object:nil];
     [self savePost];
 }
 
@@ -178,6 +188,13 @@
     }
 }
 
+#pragma mark - Notification handlers
+
+- (void)applicationWillResignActive:(NSNotification *)note {
+    [self savePost];
+}
+#pragma mark -
+
 - (BOOL)isDirty;
 {
     return self.modifiedPost.new || ![self.modifiedPost isEqualToPost:self.post];
@@ -208,6 +225,15 @@
         savePromise = [self.blogController requestUpdatePost:newPost];
     }
     self.savePromise = savePromise;
+
+    UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
+    [indicatorView startAnimating];
+    UIBarButtonItem *indicatorItem = [[UIBarButtonItem alloc] initWithCustomView:indicatorView];
+    NSMutableArray *items = [self.toolbar.items mutableCopy];
+    UIBarButtonItem *saveItem = self.saveBarButtonItem; // get a strong reference since the property is weak and we're removing it
+    [items replaceObjectAtIndex:[items indexOfObject:saveItem] withObject:indicatorItem];
+    [self.toolbar setItems:items animated:NO];
+
     return savePromise.then(^{
         NSLog(@"%@ post at path %@", verb, path);
 
@@ -231,11 +257,14 @@
         return error;
     }).finally(^{
         self.savePromise = nil;
+        [items replaceObjectAtIndex:[items indexOfObject:indicatorItem] withObject:saveItem];
+        [self.toolbar setItems:items animated:NO];
     });
 }
 
 - (void)updatePostBody {
     self.modifiedPost = [self.modifiedPost copyWithBody:self.textView.text];
+    [self configureSaveButton];
 }
 
 - (void)updatePostTitle:(NSString *)title {
@@ -270,6 +299,10 @@
     });
 }
 
+- (IBAction)save:(id)sender {
+    [self savePost];
+}
+
 - (IBAction)presentChangeTitle:(id)sender {
     if (self.presentedViewController) {
         return;
@@ -355,4 +388,10 @@
     }
 }
 
+#pragma mark - UITextViewDelegate methods
+
+- (void)textViewDidChange:(UITextView *)textView {
+    [self updatePostBody];
+}
+
 @end