default topBar buttons options support

lib/ios/RNNButtonOptions.h

+#import "RNNOptions.h"
+
+@interface RNNButtonOptions : RNNOptions
+
+@property (nonatomic, strong) NSString* fontFamily;
+@property (nonatomic, strong) NSNumber* fontSize;
+@property (nonatomic, strong) NSNumber* color;
+@property (nonatomic, strong) NSNumber* disabledColor;
+
+@end

lib/ios/RNNButtonOptions.m

+#import "RNNButtonOptions.h"
+
+@implementation RNNButtonOptions
+
+@end

lib/ios/RNNNavigationButtons.h

 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 #import "RNNRootViewController.h"
+#import "RNNButtonOptions.h"
 
 @interface RNNNavigationButtons : NSObject
 
 -(instancetype)initWithViewController:(RNNRootViewController*)viewController;
 
--(void)applyLeftButtons:(NSArray*)leftButtons rightButtons:(NSArray*)rightButtons;
+-(void)applyLeftButtons:(NSArray*)leftButtons rightButtons:(NSArray*)rightButtons defaultButtonStyle:(RNNButtonOptions *)defaultButtonStyle;
 
 @end
 

lib/ios/RNNNavigationButtons.m

 @property (weak, nonatomic) RNNRootViewController* viewController;
 @property (strong, nonatomic) NSArray* rightButtons;
 @property (strong, nonatomic) NSArray* leftButtons;
+@property (strong, nonatomic) RNNButtonOptions* defaultButtonStyle;
 
 @end
 
 	return self;
 }
 
--(void)applyLeftButtons:(NSArray*)leftButtons rightButtons:(NSArray*)rightButtons {
+-(void)applyLeftButtons:(NSArray*)leftButtons rightButtons:(NSArray*)rightButtons defaultButtonStyle:(RNNButtonOptions *)defaultButtonStyle {
+	_defaultButtonStyle = defaultButtonStyle;
 	if (leftButtons) {
 		[self setButtons:leftButtons side:@"left" animated:NO];
 	}
 	NSMutableDictionary* textAttributes = [[NSMutableDictionary alloc] init];
 	NSMutableDictionary* disabledTextAttributes = [[NSMutableDictionary alloc] init];
 	
-	id color = dictionary[@"color"];
+	UIColor* color = [self color:dictionary[@"color"] defaultColor:_defaultButtonStyle.color];
 	if (color) {
-		[textAttributes setObject:[RCTConvert UIColor:color] forKey:NSForegroundColorAttributeName];
+		[textAttributes setObject:color forKey:NSForegroundColorAttributeName];
 	}
 	
-	NSNumber* disabledColor = dictionary[@"disabledColor"];
+	UIColor* disabledColor = [self color:dictionary[@"disabledColor"] defaultColor:_defaultButtonStyle.disabledColor];;
 	if (disabledColor) {
-		UIColor *color = [RCTConvert UIColor:disabledColor];
+		UIColor *color = disabledColor;
 		[disabledTextAttributes setObject:color forKey:NSForegroundColorAttributeName];
 	}
 	
-	NSNumber* fontSize = dictionary[@"fontSize"] ? dictionary[@"fontSize"] : @(17);
-	NSString* fontFamily = dictionary[@"fontFamily"];
+	NSNumber* fontSize = [self fontSize:dictionary[@"fontSize"] defaultFontSize:_defaultButtonStyle.fontSize];
+	NSString* fontFamily = [self fontFamily:dictionary[@"fontFamily"] defaultFontFamily:_defaultButtonStyle.fontFamily];
 	if (fontFamily) {
 		[textAttributes setObject:[UIFont fontWithName:fontFamily size:[fontSize floatValue]] forKey:NSFontAttributeName];
 	} else{
 	return barButtonItem;
 }
 
+- (UIColor *)color:(NSNumber *)color defaultColor:(NSNumber *)defaultColor {
+	if (color) {
+		return [RCTConvert UIColor:color];
+	} else if (defaultColor) {
+		return [RCTConvert UIColor:defaultColor];
+	}
+		
+	return nil;
+}
+
+- (NSNumber *)fontSize:(NSNumber *)fontSize defaultFontSize:(NSNumber *)defaultFontSize {
+	if (fontSize) {
+		return fontSize;
+	} else if (defaultFontSize) {
+		return defaultFontSize;
+	}
+	
+	return @(17);
+}
+
+- (NSString *)fontFamily:(NSString *)fontFamily defaultFontFamily:(NSString *)defaultFontFamily {
+	if (fontFamily) {
+		return fontFamily;
+	} else {
+		return defaultFontFamily;
+	}
+}
+
 -(void)onButtonPress:(RNNUIBarButtonItem*)barButtonItem {
 	[self.viewController.eventEmitter sendOnNavigationButtonPressed:self.viewController.componentId buttonId:barButtonItem.buttonId];
 }

lib/ios/RNNTopBarOptions.h

 #import "RNNBackgroundOptions.h"
 #import "RNNComponentOptions.h"
 #import "RNNBackButtonOptions.h"
+#import "RNNButtonOptions.h"
 
 @interface RNNTopBarOptions : RNNOptions
 
 @property (nonatomic, strong) RNNSubtitleOptions* subtitle;
 @property (nonatomic, strong) RNNBackgroundOptions* background;
 @property (nonatomic, strong) RNNBackButtonOptions* backButton;
+@property (nonatomic, strong) RNNButtonOptions* button;
 @property (nonatomic, strong) NSNumber* searchBar;
 @property (nonatomic, strong) NSNumber* searchBarHiddenWhenScrolling;
 @property (nonatomic, strong) NSString* searchBarPlaceholder;

lib/ios/RNNTopBarOptions.m

 	
 	if (self.rightButtons || self.leftButtons) {
 		_navigationButtons = [[RNNNavigationButtons alloc] initWithViewController:(RNNRootViewController*)viewController];
-		[_navigationButtons applyLeftButtons:self.leftButtons rightButtons:self.rightButtons];
+		[_navigationButtons applyLeftButtons:self.leftButtons rightButtons:self.rightButtons defaultButtonStyle:_button];
 	}
 }
 

lib/ios/ReactNativeNavigation.xcodeproj/project.pbxproj

 		507F43F81FF525B500D9425B /* RNNSegmentedControl.h in Headers */ = {isa = PBXBuildFile; fileRef = 507F43F61FF525B500D9425B /* RNNSegmentedControl.h */; };
 		507F43F91FF525B500D9425B /* RNNSegmentedControl.m in Sources */ = {isa = PBXBuildFile; fileRef = 507F43F71FF525B500D9425B /* RNNSegmentedControl.m */; };
 		507F44201FFA8A8800D9425B /* RNNRootViewProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 507F441F1FFA8A8800D9425B /* RNNRootViewProtocol.h */; };
+		50887C1520ECC5C200D06111 /* RNNButtonOptions.h in Headers */ = {isa = PBXBuildFile; fileRef = 50887C1320ECC5C200D06111 /* RNNButtonOptions.h */; };
+		50887C1620ECC5C200D06111 /* RNNButtonOptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 50887C1420ECC5C200D06111 /* RNNButtonOptions.m */; };
 		50A00C37200F84D6000F01A6 /* RNNOverlayOptions.h in Headers */ = {isa = PBXBuildFile; fileRef = 50A00C35200F84D6000F01A6 /* RNNOverlayOptions.h */; };
 		50A00C38200F84D6000F01A6 /* RNNOverlayOptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 50A00C36200F84D6000F01A6 /* RNNOverlayOptions.m */; };
 		50BE951220B5A787004F5DF5 /* RNNStatusBarOptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 50BE951020B5A787004F5DF5 /* RNNStatusBarOptions.m */; };
 		507F43F61FF525B500D9425B /* RNNSegmentedControl.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RNNSegmentedControl.h; sourceTree = "<group>"; };
 		507F43F71FF525B500D9425B /* RNNSegmentedControl.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = RNNSegmentedControl.m; sourceTree = "<group>"; };
 		507F441F1FFA8A8800D9425B /* RNNRootViewProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RNNRootViewProtocol.h; sourceTree = "<group>"; };
+		50887C1320ECC5C200D06111 /* RNNButtonOptions.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RNNButtonOptions.h; sourceTree = "<group>"; };
+		50887C1420ECC5C200D06111 /* RNNButtonOptions.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = RNNButtonOptions.m; sourceTree = "<group>"; };
 		50A00C35200F84D6000F01A6 /* RNNOverlayOptions.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RNNOverlayOptions.h; sourceTree = "<group>"; };
 		50A00C36200F84D6000F01A6 /* RNNOverlayOptions.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = RNNOverlayOptions.m; sourceTree = "<group>"; };
 		50BE951020B5A787004F5DF5 /* RNNStatusBarOptions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RNNStatusBarOptions.m; sourceTree = "<group>"; };
 				50175CD0207A2AA1004FE91B /* RNNComponentOptions.m */,
 				A7626BFE1FC2FB6700492FB8 /* RNNTopBarOptions.h */,
 				A7626BFC1FC2FB2C00492FB8 /* RNNTopBarOptions.m */,
+				50887C1320ECC5C200D06111 /* RNNButtonOptions.h */,
+				50887C1420ECC5C200D06111 /* RNNButtonOptions.m */,
 				502CB46C20CD1DDA0019B2FE /* RNNBackButtonOptions.h */,
 				502CB46D20CD1DDA0019B2FE /* RNNBackButtonOptions.m */,
 				50570B242061473D006A1B5C /* RNNTitleOptions.h */,
 				50D031342005149000386B3D /* RNNOverlayManager.h in Headers */,
 				7B1126A71E2D2B6C00F9B03B /* RNNEventEmitter.h in Headers */,
 				E8A430111F9CB87B00B61A20 /* RNNAnimatedView.h in Headers */,
+				50887C1520ECC5C200D06111 /* RNNButtonOptions.h in Headers */,
 				50C4A496206BDDBB00DB292E /* RNNSubtitleOptions.h in Headers */,
 				268692821E5054F800E2C612 /* RNNStore.h in Headers */,
 				E8AEDB3C1F55A1C2000F5A6A /* RNNElementView.h in Headers */,
 				263905AF1E4C6F440023D7D3 /* MMDrawerBarButtonItem.m in Sources */,
 				E8AEDB4B1F5C0BAF000F5A6A /* RNNInteractivePopAnimator.m in Sources */,
 				7B4928091E70415400555040 /* RNNCommandsHandler.m in Sources */,
+				50887C1620ECC5C200D06111 /* RNNButtonOptions.m in Sources */,
 				268692831E5054F800E2C612 /* RNNStore.m in Sources */,
 				7BC9346E1E26886E00EFA125 /* RNNControllerFactory.m in Sources */,
 				507F43F91FF525B500D9425B /* RNNSegmentedControl.m in Sources */,