Re: Re: Now allowing the custom nav bar to take up the whole space on iOS

ios/RCCCustomTitleView.m

@@ -12,13 +12,14 @@ @interface RCCCustomTitleView ()
 
 @property (nonatomic, strong) RCTRootView *subView;
 @property (nonatomic, strong) NSString *alignment;
-
+@property float initialWidth;
 @end
 
 @implementation RCCCustomTitleView
 
 - (instancetype)initWithFrame:(CGRect)frame subView:(RCTRootView*)subView alignment:(NSString*)alignment {
     self = [super init];
+    _initialWidth = frame.size.width;
 
     if (self) {
         self.subView = subView;
@@ -59,16 +60,56 @@ - (void)rootViewDidChangeIntrinsicSize:(RCTRootView *)rootView {
     }
 }
 
+- (void)setFrame:(CGRect) frame {
+    float referenceWidth = [self statusBarWidth];
+    if (referenceWidth == 0) {
+        referenceWidth = _initialWidth;
+    }
+    float newNavBarWidth = frame.size.width;
+    BOOL frameNeedsToBeCorrected = newNavBarWidth < referenceWidth || CGRectEqualToRect(self.frame, CGRectZero);
+
+    if (frameNeedsToBeCorrected) {
+        // first we need to find out the total point diff of the status bar and the nav bar
+        float navBarHorizontalMargin = referenceWidth - newNavBarWidth;
+
+        CGRect correctedFrame = frame;
+
+        // then we need to place the nav bar half times the horizontal margin to the left
+        correctedFrame.origin.x = -(navBarHorizontalMargin / 2);
+
+        // and finally set the width so that it's equal to the status bar width
+        correctedFrame.size.width = referenceWidth;
+
+        [super setFrame:correctedFrame];
+    } else if (frame.size.height != self.frame.size.height) { // otherwise
+        // if only the height has changed
+        CGRect newHeightFrame = self.frame;
+        // make sure we update just the height
+        newHeightFrame.size.height = frame.size.height;
+        [super setFrame:newHeightFrame];
+    }
+
+    // keep a ref to the last frame, so that we avoid setting the frame twice for no reason
+//    _lastFrame = frame;
+}
+
+
 - (void) viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
     // whenever the orientation changes this runs
     // and sets the nav bar item width to the new size width
     CGRect newFrame = self.frame;
-    
+
     if (newFrame.size.width < size.width) {
         newFrame.size.width = size.width;
         newFrame.origin.x = 0;
     }
     [super setFrame:newFrame];
 }
 
+-(float) statusBarWidth {
+    CGSize statusBarSize = [[UIApplication sharedApplication] statusBarFrame].size;
+    return MAX(statusBarSize.width, statusBarSize.height);
+}
+
+
 @end