#1675 (fix iPad login/signup layout)

- Fixed dark fields.
- Fixed login controls not being centered.
- Fixed login view appearing then disapparing on iPad.
- Fixed crashes trying to load data while showing login view.

clients/ios/Classes/LoginViewController.m

@@ -46,6 +46,8 @@
 - (void)viewDidLoad {
     self.appDelegate = NewsBlurAppDelegate.sharedAppDelegate;
     
+    self.overrideUserInterfaceStyle = UIUserInterfaceStyleLight;
+    
     self.usernameInput.borderStyle = UITextBorderStyleRoundedRect;
     self.passwordInput.borderStyle = UITextBorderStyleRoundedRect;
     self.emailInput.borderStyle = UITextBorderStyleRoundedRect;
@@ -63,11 +65,6 @@
 
     //[self.onePasswordButton setHidden:![[OnePasswordExtension sharedExtension] isAppExtensionAvailable]];
     
-    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
-        [self updateControls];
-        [self rearrangeViews];
-    }
-    
     [super viewDidLoad];
 }
 
@@ -110,6 +107,11 @@
 - (void)viewDidAppear:(BOOL)animated {
     [MBProgressHUD hideHUDForView:self.view animated:YES];
     [super viewDidAppear:animated];
+    
+    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
+        [self updateControls];
+        [self rearrangeViews];
+    }
 }
 
 - (void)didReceiveMemoryWarning {

clients/ios/Classes/NewsBlurAppDelegate.m

@@ -1186,6 +1186,10 @@
 }
 
 - (void)showLogin {
+    if (self.loginViewController.view.window != nil) {
+        return;
+    }
+    
     self.dictFeeds = nil;
     self.dictSocialFeeds = nil;
     self.dictSavedStoryTags = nil;
@@ -1931,6 +1935,10 @@
     self.readStories = [NSMutableArray array];
     NSMutableArray *feeds = [NSMutableArray array];
     
+    if (self.loginViewController.view.window != nil) {
+        return;
+    }
+    
     self.inFeedDetail = YES;
     [feedDetailView resetFeedDetail];
     if (feedDetailView == feedDetailViewController) {