Use Dynamic Text Size Multipliers from Wilde in ReactNative Module

React/Modules/RCTAccessibilityManager.h

@@ -18,6 +18,9 @@ extern NSString *const RCTAccessibilityManagerDidUpdateMultiplierNotification; /
 
 @property (nonatomic, readonly) CGFloat multiplier;
 
+/// map from UIKit categories to multipliers
+@property (nonatomic, copy) NSDictionary *multipliers;
+
 @end
 
 @interface RCTBridge (RCTAccessibilityManager)

React/Modules/RCTAccessibilityManager.m

@@ -15,7 +15,6 @@ NSString *const RCTAccessibilityManagerDidUpdateMultiplierNotification = @"RCTAc
 
 @interface RCTAccessibilityManager ()
 
-@property (nonatomic, copy) NSDictionary *multipliers;
 @property (nonatomic, copy) NSString *contentSizeCategory;
 @property (nonatomic, assign) CGFloat multiplier;
 
@@ -24,6 +23,7 @@ NSString *const RCTAccessibilityManagerDidUpdateMultiplierNotification = @"RCTAc
 @implementation RCTAccessibilityManager
 
 @synthesize bridge = _bridge;
+@synthesize multipliers = _multipliers;
 
 RCT_EXPORT_MODULE()
 
@@ -80,10 +80,15 @@ RCT_EXPORT_MODULE()
 {
   if (_contentSizeCategory != contentSizeCategory) {
     _contentSizeCategory = [contentSizeCategory copy];
+    [self invalidateMultiplier];
+  }
+}
+
+- (void)invalidateMultiplier
+{
   self.multiplier = [self multiplierForContentSizeCategory:_contentSizeCategory];
   [[NSNotificationCenter defaultCenter] postNotificationName:RCTAccessibilityManagerDidUpdateMultiplierNotification object:self];
 }
-}
 
 - (CGFloat)multiplierForContentSizeCategory:(NSString *)category
 {
@@ -95,6 +100,14 @@ RCT_EXPORT_MODULE()
   return m.doubleValue;
 }
 
+- (void)setMultipliers:(NSDictionary *)multipliers
+{
+  if (_multipliers != multipliers) {
+    _multipliers = [multipliers copy];
+    [self invalidateMultiplier];
+  }
+}
+
 - (NSDictionary *)multipliers
 {
   if (_multipliers == nil) {