diff --git a/Example/FCAlertView/ExampleViewController.m b/Example/FCAlertView/ExampleViewController.m
index d296ceb..1ab2e0b 100644
--- a/Example/FCAlertView/ExampleViewController.m
+++ b/Example/FCAlertView/ExampleViewController.m
@@ -559,6 +559,8 @@ - (IBAction)showAlert:(id)sender {
      
      */
     
+    [alert addButton:@"Block" withActionBlock:nil];
+    
     /* USING BLOCK ACTION FOR DONE BUTTON -- Uncomment to Try it out
 
      [alert doneActionBlock:^{
diff --git a/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.h b/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.h
index 53b8369..014469f 100644
--- a/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.h
+++ b/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.h
@@ -77,34 +77,34 @@
 typedef void (^FCActionBlock)(void);
 @property (nonatomic, copy) FCActionBlock actionBlock;
 @property (nonatomic, copy) FCActionBlock doneBlock;
-- (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action;
-- (void)doneActionBlock:(FCActionBlock)action;
+- (void)addButton:(NSString *)title withActionBlock:(nullable FCActionBlock)action;
+- (void)doneActionBlock:(nullable FCActionBlock)action;
 
 // Color Schemes
 
-@property (nonatomic, retain) UIColor * colorScheme;
-@property (nonatomic, retain)  UIColor * titleColor;
-@property (nonatomic, retain)  UIColor * subTitleColor;
+@property (nonatomic, retain) UIColor * __nullable colorScheme;
+@property (nonatomic, retain)  UIColor * __nullable titleColor;
+@property (nonatomic, retain)  UIColor * __nullable subTitleColor;
 
 // Preset Flat Colors
 
-@property (nonatomic, retain) UIColor * flatTurquoise;
-@property (nonatomic, retain) UIColor * flatGreen;
-@property (nonatomic, retain) UIColor * flatBlue;
-@property (nonatomic, retain) UIColor * flatMidnight;
-@property (nonatomic, retain) UIColor * flatPurple;
-@property (nonatomic, retain) UIColor * flatOrange;
-@property (nonatomic, retain) UIColor * flatRed;
-@property (nonatomic, retain) UIColor * flatSilver;
-@property (nonatomic, retain) UIColor * flatGray;
+@property (nonatomic, retain) UIColor * __nullable flatTurquoise;
+@property (nonatomic, retain) UIColor * __nullable flatGreen;
+@property (nonatomic, retain) UIColor * __nullable flatBlue;
+@property (nonatomic, retain) UIColor * __nullable flatMidnight;
+@property (nonatomic, retain) UIColor * __nullable flatPurple;
+@property (nonatomic, retain) UIColor * __nullable flatOrange;
+@property (nonatomic, retain) UIColor * __nullable flatRed;
+@property (nonatomic, retain) UIColor * __nullable flatSilver;
+@property (nonatomic, retain) UIColor * __nullable flatGray;
 
 @end
 
 @protocol FCAlertViewDelegate <NSObject>
 @optional
-- (void)FCAlertView:(FCAlertView *)alertView clickedButtonIndex:(NSInteger)index buttonTitle:(NSString *)title;
-- (void)FCAlertViewDismissed:(FCAlertView *)alertView;
-- (void)FCAlertViewWillAppear:(FCAlertView *)alertView;
-- (void)FCAlertDoneButtonClicked:(FCAlertView *)alertView;
+- (void)FCAlertView:( FCAlertView * _Null_unspecified )alertView clickedButtonIndex:(NSInteger)index buttonTitle:(NSString * _Null_unspecified)title;
+- (void)FCAlertViewDismissed:(FCAlertView * _Null_unspecified)alertView;
+- (void)FCAlertViewWillAppear:(FCAlertView * _Null_unspecified)alertView;
+- (void)FCAlertDoneButtonClicked:(FCAlertView * _Null_unspecified)alertView;
 
 @end
diff --git a/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.m b/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.m
index 21ce459..c2384a7 100644
--- a/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.m
+++ b/Example/Pods/FCAlertView/FCAlertView/Classes/FCAlertView.m
@@ -466,7 +466,7 @@ - (void)drawRect:(CGRect)rect {
         alertViewVector = [UIButton buttonWithType:UIButtonTypeCustom];
     else
         alertViewVector = [UIButton buttonWithType:UIButtonTypeSystem];
-
+    
     alertViewVector.frame = CGRectMake(alertViewContents.frame.size.width/2 - 15.0f,
                                        -15.0f,
                                        30.0f,
@@ -577,12 +577,12 @@ - (void) showAlertInView:(UIViewController *)view withTitle:(NSString *)title wi
     
     if (!alertViewWithVector)
         vectorImage = image;
-
+    
     // Checks prior to presenting View
     
     [self checkCustomizationValid];
     [self safetyCloseCheck];
-
+    
     [view.view.window addSubview:self];
     
 }
@@ -627,11 +627,18 @@ - (void) dismissAlertView {
     
 }
 
+#pragma mark - Action Block Methods
+
 - (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action {
     
-    if (alertButtons.count < 2)
-        [alertButtons addObject:@{@"title" : title,
-                                  @"action" : action}];
+    if (alertButtons.count < 2) {
+        if (action != nil)
+            [alertButtons addObject:@{@"title" : title,
+                                      @"action" : action}];
+        else
+            [alertButtons addObject:@{@"title" : title,
+                                      @"action" : @0}];
+    }
     
     _numberOfButtons = alertButtons.count;
     
@@ -639,7 +646,8 @@ - (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action {
 
 - (void)doneActionBlock:(FCActionBlock)action {
     
-    self.doneBlock = action;
+    if (action != nil)
+        self.doneBlock = action;
     
 }
 
@@ -647,17 +655,19 @@ - (void)doneActionBlock:(FCActionBlock)action {
 #pragma mark Button Selection
 
 - (void)handleButton:(id)sender {
-
+    
     id<FCAlertViewDelegate> strongDelegate = self.delegate;
     
     UIButton *clickedButton = (UIButton*)sender;
     
     NSDictionary *btnDict = [alertButtons objectAtIndex:[sender tag]];
     
-    if ([btnDict objectForKey:@"action"] != nil && ![[btnDict objectForKey:@"action"] isEqual:@0]) {
-    FCActionBlock block = [btnDict objectForKey:@"action"];
-        if (block)
-            block();
+    if (btnDict != nil) {
+        if ([btnDict objectForKey:@"action"] != nil && ![[btnDict objectForKey:@"action"] isEqual:@0]) {
+            FCActionBlock block = [btnDict objectForKey:@"action"];
+            if (block)
+                block();
+        }
     }
     
     if ([strongDelegate respondsToSelector:@selector(FCAlertView:clickedButtonIndex:buttonTitle:)]) {
diff --git a/FCAlertView/Classes/FCAlertView.h b/FCAlertView/Classes/FCAlertView.h
index 53b8369..014469f 100644
--- a/FCAlertView/Classes/FCAlertView.h
+++ b/FCAlertView/Classes/FCAlertView.h
@@ -77,34 +77,34 @@
 typedef void (^FCActionBlock)(void);
 @property (nonatomic, copy) FCActionBlock actionBlock;
 @property (nonatomic, copy) FCActionBlock doneBlock;
-- (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action;
-- (void)doneActionBlock:(FCActionBlock)action;
+- (void)addButton:(NSString *)title withActionBlock:(nullable FCActionBlock)action;
+- (void)doneActionBlock:(nullable FCActionBlock)action;
 
 // Color Schemes
 
-@property (nonatomic, retain) UIColor * colorScheme;
-@property (nonatomic, retain)  UIColor * titleColor;
-@property (nonatomic, retain)  UIColor * subTitleColor;
+@property (nonatomic, retain) UIColor * __nullable colorScheme;
+@property (nonatomic, retain)  UIColor * __nullable titleColor;
+@property (nonatomic, retain)  UIColor * __nullable subTitleColor;
 
 // Preset Flat Colors
 
-@property (nonatomic, retain) UIColor * flatTurquoise;
-@property (nonatomic, retain) UIColor * flatGreen;
-@property (nonatomic, retain) UIColor * flatBlue;
-@property (nonatomic, retain) UIColor * flatMidnight;
-@property (nonatomic, retain) UIColor * flatPurple;
-@property (nonatomic, retain) UIColor * flatOrange;
-@property (nonatomic, retain) UIColor * flatRed;
-@property (nonatomic, retain) UIColor * flatSilver;
-@property (nonatomic, retain) UIColor * flatGray;
+@property (nonatomic, retain) UIColor * __nullable flatTurquoise;
+@property (nonatomic, retain) UIColor * __nullable flatGreen;
+@property (nonatomic, retain) UIColor * __nullable flatBlue;
+@property (nonatomic, retain) UIColor * __nullable flatMidnight;
+@property (nonatomic, retain) UIColor * __nullable flatPurple;
+@property (nonatomic, retain) UIColor * __nullable flatOrange;
+@property (nonatomic, retain) UIColor * __nullable flatRed;
+@property (nonatomic, retain) UIColor * __nullable flatSilver;
+@property (nonatomic, retain) UIColor * __nullable flatGray;
 
 @end
 
 @protocol FCAlertViewDelegate <NSObject>
 @optional
-- (void)FCAlertView:(FCAlertView *)alertView clickedButtonIndex:(NSInteger)index buttonTitle:(NSString *)title;
-- (void)FCAlertViewDismissed:(FCAlertView *)alertView;
-- (void)FCAlertViewWillAppear:(FCAlertView *)alertView;
-- (void)FCAlertDoneButtonClicked:(FCAlertView *)alertView;
+- (void)FCAlertView:( FCAlertView * _Null_unspecified )alertView clickedButtonIndex:(NSInteger)index buttonTitle:(NSString * _Null_unspecified)title;
+- (void)FCAlertViewDismissed:(FCAlertView * _Null_unspecified)alertView;
+- (void)FCAlertViewWillAppear:(FCAlertView * _Null_unspecified)alertView;
+- (void)FCAlertDoneButtonClicked:(FCAlertView * _Null_unspecified)alertView;
 
 @end
diff --git a/FCAlertView/Classes/FCAlertView.m b/FCAlertView/Classes/FCAlertView.m
index 21ce459..c2384a7 100644
--- a/FCAlertView/Classes/FCAlertView.m
+++ b/FCAlertView/Classes/FCAlertView.m
@@ -466,7 +466,7 @@ - (void)drawRect:(CGRect)rect {
         alertViewVector = [UIButton buttonWithType:UIButtonTypeCustom];
     else
         alertViewVector = [UIButton buttonWithType:UIButtonTypeSystem];
-
+    
     alertViewVector.frame = CGRectMake(alertViewContents.frame.size.width/2 - 15.0f,
                                        -15.0f,
                                        30.0f,
@@ -577,12 +577,12 @@ - (void) showAlertInView:(UIViewController *)view withTitle:(NSString *)title wi
     
     if (!alertViewWithVector)
         vectorImage = image;
-
+    
     // Checks prior to presenting View
     
     [self checkCustomizationValid];
     [self safetyCloseCheck];
-
+    
     [view.view.window addSubview:self];
     
 }
@@ -627,11 +627,18 @@ - (void) dismissAlertView {
     
 }
 
+#pragma mark - Action Block Methods
+
 - (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action {
     
-    if (alertButtons.count < 2)
-        [alertButtons addObject:@{@"title" : title,
-                                  @"action" : action}];
+    if (alertButtons.count < 2) {
+        if (action != nil)
+            [alertButtons addObject:@{@"title" : title,
+                                      @"action" : action}];
+        else
+            [alertButtons addObject:@{@"title" : title,
+                                      @"action" : @0}];
+    }
     
     _numberOfButtons = alertButtons.count;
     
@@ -639,7 +646,8 @@ - (void)addButton:(NSString *)title withActionBlock:(FCActionBlock)action {
 
 - (void)doneActionBlock:(FCActionBlock)action {
     
-    self.doneBlock = action;
+    if (action != nil)
+        self.doneBlock = action;
     
 }
 
@@ -647,17 +655,19 @@ - (void)doneActionBlock:(FCActionBlock)action {
 #pragma mark Button Selection
 
 - (void)handleButton:(id)sender {
-
+    
     id<FCAlertViewDelegate> strongDelegate = self.delegate;
     
     UIButton *clickedButton = (UIButton*)sender;
     
     NSDictionary *btnDict = [alertButtons objectAtIndex:[sender tag]];
     
-    if ([btnDict objectForKey:@"action"] != nil && ![[btnDict objectForKey:@"action"] isEqual:@0]) {
-    FCActionBlock block = [btnDict objectForKey:@"action"];
-        if (block)
-            block();
+    if (btnDict != nil) {
+        if ([btnDict objectForKey:@"action"] != nil && ![[btnDict objectForKey:@"action"] isEqual:@0]) {
+            FCActionBlock block = [btnDict objectForKey:@"action"];
+            if (block)
+                block();
+        }
     }
     
     if ([strongDelegate respondsToSelector:@selector(FCAlertView:clickedButtonIndex:buttonTitle:)]) {