[ios] Added fade in/out to dialogs.

iphone/Maps/Classes/CustomAlert/AlertController/MWMAlertViewController.h

@@ -12,11 +12,13 @@
 #include "routing/router.hpp"
 #include "storage/storage.hpp"
 
+typedef void (^CloseAlertCompletion)();
+
 @interface MWMAlertViewController : UIViewController
 
-@property (weak, nonatomic, readonly) UIViewController * ownerViewController;
+@property (nonnull, weak, nonatomic, readonly) UIViewController * ownerViewController;
 
-- (instancetype)initWithViewController:(UIViewController *)viewController;
+- (nonnull instancetype)initWithViewController:(nonnull UIViewController *)viewController;
 - (void)presentAlert:(routing::IRouter::ResultCode)type;
 - (void)presentDownloaderAlertWithCountries:(vector<storage::TIndex> const &)countries routes:(vector<storage::TIndex> const &)routes;
 - (void)presentCrossCountryAlertWithCountries:(vector<storage::TIndex> const &)countries routes:(vector<storage::TIndex> const &)routes;
@@ -28,12 +30,11 @@
 - (void)presentLocationAlert;
 - (void)presentLocationServiceNotSupportedAlert;
 - (void)presentNoConnectionAlert;
-- (void)presentnoWiFiAlertWithName:(NSString *)name downloadBlock:(RightButtonAction)block;
+- (void)presentnoWiFiAlertWithName:(nonnull NSString *)name downloadBlock:(nullable RightButtonAction)block;
+- (void)closeAlertWithCompletion:(nullable CloseAlertCompletion)completion;
 
-- (void)closeAlert;
-
-- (instancetype)init __attribute__((unavailable("-init isn't available, call -initWithViewController: instead!")));
-+ (instancetype)new __attribute__((unavailable("+new isn't available, call -initWithViewController: instead!")));
-- (instancetype)initWithCoder:(NSCoder *)aDecoder __attribute__((unavailable("-initWithCoder: isn't available, call -initWithViewController: instead!")));
-- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil __attribute__((unavailable("-initWithNibName:bundle: isn't available, call -initWithViewController: instead!")));
+- (nonnull instancetype)init __attribute__((unavailable("-init isn't available, call -initWithViewController: instead!")));
++ (nonnull instancetype)new __attribute__((unavailable("+new isn't available, call -initWithViewController: instead!")));
+- (nonnull instancetype)initWithCoder:(nonnull NSCoder *)aDecoder __attribute__((unavailable("-initWithCoder: isn't available, call -initWithViewController: instead!")));
+- (nonnull instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil __attribute__((unavailable("-initWithNibName:bundle: isn't available, call -initWithViewController: instead!")));
 @end

iphone/Maps/Classes/CustomAlert/AlertController/MWMAlertViewController.mm

@@ -15,13 +15,13 @@ static NSString * const kAlertControllerNibIdentifier = @"MWMAlertViewController
 
 @interface MWMAlertViewController () <UIGestureRecognizerDelegate, UIAlertViewDelegate>
 
-@property (weak, nonatomic, readwrite) UIViewController * ownerViewController;
+@property (nonnull ,weak, nonatomic, readwrite) UIViewController * ownerViewController;
 
 @end
 
 @implementation MWMAlertViewController
 
-- (instancetype)initWithViewController:(UIViewController *)viewController
+- (nonnull instancetype)initWithViewController:(nonnull UIViewController *)viewController
 {
   self = [super initWithNibName:kAlertControllerNibIdentifier bundle:nil];
   if (self)
@@ -86,7 +86,7 @@ static NSString * const kAlertControllerNibIdentifier = @"MWMAlertViewController
   [self displayAlert:MWMAlert.noConnectionAlert];
 }
 
-- (void)presentnoWiFiAlertWithName:(NSString *)name downloadBlock:(RightButtonAction)block
+- (void)presentnoWiFiAlertWithName:(nonnull NSString *)name downloadBlock:(nullable RightButtonAction)block
 {
   [self displayAlert:[MWMAlert noWiFiAlertWithName:name downloadBlock:block]];
 }
@@ -125,6 +125,10 @@ static NSString * const kAlertControllerNibIdentifier = @"MWMAlertViewController
 {
   alert.alertController = self;
   [self.ownerViewController addChildViewController:self];
+  self.view.alpha = 0.;
+  alert.alpha = 0.;
+  CGFloat const scale = 1.1;
+  alert.transform = CGAffineTransformMakeScale(scale, scale);
   self.view.center = self.ownerViewController.view.center;
   [self.ownerViewController.view addSubview:self.view];
   UIWindow * window = [[[UIApplication sharedApplication] delegate] window];
@@ -133,13 +137,29 @@ static NSString * const kAlertControllerNibIdentifier = @"MWMAlertViewController
   [self.view addSubview:alert];
   alert.bounds = self.view.bounds;
   alert.center = self.view.center;
+  [UIView animateWithDuration:.15 animations:^
+  {
+    self.view.alpha = 1.;
+    alert.alpha = 1.;
+    alert.transform = CGAffineTransformIdentity;
+  }];
 }
 
-- (void)closeAlert
+- (void)closeAlertWithCompletion:(nullable CloseAlertCompletion)completion
 {
-  self.ownerViewController.view.userInteractionEnabled = YES;
-  [self.view removeFromSuperview];
-  [self removeFromParentViewController];
+  MWMAlert * alert = self.view.subviews.firstObject;
+  [UIView animateWithDuration:.15 animations:^
+  {
+    alert.alpha = 0.;
+    self.view.alpha = 0.;
+  }
+  completion:^(BOOL finished)
+  {
+    if (completion)
+      completion();
+    [self.view removeFromSuperview];
+    [self removeFromParentViewController];
+  }];
 }
 
 - (void)openSettings

iphone/Maps/Classes/CustomAlert/BaseAlert/MWMAlert.mm

@@ -105,8 +105,10 @@
 
 - (void)close
 {
-  [self removeFromSuperview];
-  [self.alertController closeAlert];
+  [self.alertController closeAlertWithCompletion:^
+  {
+    [self removeFromSuperview];
+  }];
 }
 
 - (void)setNeedsCloseAlertAfterEnterBackground