Fix some UI issues, mostly with alerts.

[FIXED]     Schedule all UI-changing methods on the main thread.  Fixes
            some UI bugs.
[FIXED]     Attempt to calculate password for deleted element.
[FIXED]     MP-6: Close open alert when switching sites.
[FIXED]     MP-7: Remind user to change site's password when creating a
            new site.

MasterPassword-iOS.xcodeproj/xcshareddata/xcschemes/MasterPassword (Development).xcscheme

@@ -57,6 +57,11 @@
          </BuildableReference>
       </BuildableProductRunnable>
       <AdditionalOptions>
+         <AdditionalOption
+            key = "NSZombieEnabled"
+            value = "YES"
+            isEnabled = "YES">
+         </AdditionalOption>
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction

MasterPassword/MPElementEntity.h

@@ -19,6 +19,6 @@
 @property (nonatomic, assign) NSTimeInterval lastUsed;
 @property (nonatomic, retain, readonly) id content;
 
-- (void)use;
+- (int16_t)use;
 
 @end

MasterPassword/MPElementEntity.m

@@ -17,10 +17,10 @@
 @dynamic uses;
 @dynamic lastUsed;
 
-- (void)use {
+- (int16_t)use {
     
-    ++self.uses;
     self.lastUsed = [[NSDate date] timeIntervalSinceReferenceDate];
+    return ++self.uses;
 }
 
 - (id)content {

MasterPassword/iOS/MPAppDelegate.m

@@ -27,7 +27,7 @@
     [MPiOSConfig get];
 
 #ifdef DEBUG
-    [PearlLogger get].autoprintLevel = PearlLogLevelTrace;
+    [PearlLogger get].autoprintLevel = PearlLogLevelDebug;
     [NSClassFromString(@"WebView") performSelector:@selector(_enableRemoteInspector)];
 #endif
 }

MasterPassword/iOS/MPMainViewController.m

@@ -109,17 +109,7 @@
     
     [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationWillResignActiveNotification object:nil queue:[NSOperationQueue mainQueue]
                                                   usingBlock:^(NSNotification *note) {
-                                                      if (![MPAppDelegate get].key) {
                                                       self.activeElement = nil;
-                                                          [self updateAnimated:NO];
-                                                      }
-                                                  }];
-    [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidBecomeActiveNotification object:nil queue:[NSOperationQueue mainQueue]
-                                                  usingBlock:^(NSNotification *note) {
-                                                      if (![MPAppDelegate get].key) {
-                                                          self.activeElement = nil;
-                                                          [self updateAnimated:NO];
-                                                      }
                                                   }];
     
     self.alertBody.text = nil;
@@ -154,12 +144,14 @@
     
     [[MPAppDelegate get] saveContext];
     
+    dispatch_async(dispatch_get_main_queue(), ^{
         if (animated)
             [UIView animateWithDuration:0.3f animations:^{
                 [self updateWasAnimated:animated];
             }];
         else
             [self updateWasAnimated:animated];
+    });
 }
 
 - (void)updateWasAnimated:(BOOL)animated {
@@ -180,6 +172,8 @@
     if ([self.activeElement isKindOfClass:[MPElementGeneratedEntity class]])
         self.passwordCounter.text = [NSString stringWithFormat:@"%u", ((MPElementGeneratedEntity *) self.activeElement).counter];
     
+    self.contentField.text = @"";
+    if (self.activeElement.name && ![self.activeElement isDeleted])
         dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
             NSString *description = [self.activeElement description];
             
@@ -201,6 +195,7 @@
 
 - (void)setHelpHidden:(BOOL)hidden animated:(BOOL)animated {
     
+    dispatch_async(dispatch_get_main_queue(), ^{
         [UIView animateWithDuration:animated? 0.3f: 0 animations:^{
             if (hidden) {
                 self.contentContainer.frame = CGRectSetHeight(self.contentContainer.frame, self.view.bounds.size.height - 44);
@@ -212,6 +207,7 @@
                 [MPiOSConfig get].helpHidden = [NSNumber numberWithBool:NO];
             }
         }];
+    });
 }
 
 - (void)setHelpChapter:(NSString *)chapter {
@@ -220,6 +216,7 @@
     [TestFlight passCheckpoint:[NSString stringWithFormat:MPTestFlightCheckpointHelpChapter, chapter]];
 #endif
     
+    dispatch_async(dispatch_get_main_queue(), ^{
         [self.helpView loadRequest:
          [NSURLRequest requestWithURL:
           [NSURL URLWithString:[NSString stringWithFormat:@"#%@", chapter] relativeToURL:
@@ -229,10 +226,12 @@
                                                                                  ClassNameFromMPElementType(self.activeElement.type)]];
         if (error.length)
             err(@"setClass: %@", error);
+    });
 }
 
 - (void)showContentTip:(NSString *)message withIcon:(UIImageView *)icon {
     
+    dispatch_async(dispatch_get_main_queue(), ^{
         self.contentTipBody.text = message;
         
         icon.hidden = NO;
@@ -251,10 +250,12 @@
                 });
             }
         }];
+    });
 }
 
 - (void)showAlertWithTitle:(NSString *)title message:(NSString *)message {
     
+    dispatch_async(dispatch_get_main_queue(), ^{
         self.alertTitle.text = title;
         NSRange scrollRange = NSMakeRange(self.alertBody.text.length, message.length);
         if ([self.alertBody.text length])
@@ -266,6 +267,7 @@
         [UIView animateWithDuration:0.2f animations:^{
             self.alertContainer.alpha = 1;
         }];
+    });
 }
 
 #pragma mark - Protocols
@@ -333,6 +335,7 @@
     [UIView animateWithDuration:0.3f animations:^{
         self.alertContainer.alpha = 0;
     } completion:^(BOOL finished) {
+        if (finished)
             self.alertBody.text = nil;
     }];
     
@@ -429,9 +432,18 @@
 
 - (void)didSelectElement:(MPElementEntity *)element {
     
+    [self closeAlert];
+    
     if (element) {
         self.activeElement = element;
-        [self.activeElement use];
+        if ([self.activeElement use] == 1)
+            [self showAlertWithTitle:@"New Site" message:
+             l(@"You've just created a password for %@.\n\n"
+               @"IMPORTANT:\n"
+               @"Don't forget to set or change the password for your account at %@ to the password above. "
+               @"It's best to do this right away. If you forget it, may get confusing later on "
+               @"to remember what password you need to use for logging into the site.",
+               self.activeElement.name, self.activeElement.name)];
         
         [self.searchDisplayController setActive:NO animated:YES];
         self.searchDisplayController.searchBar.text = self.activeElement.name;