From 1a875f9483b51f210b3305c1994bb568c0387df4 Mon Sep 17 00:00:00 2001
From: Chengyin Liu <chengyin.liu@airbnb.com>
Date: Tue, 25 Oct 2016 18:44:18 -0700
Subject: [PATCH] Better font family check on iOS

Font names can be specified as something like `Helvetica-Bold`. This is specially common when using custom fonts. This fix makes sure those supported custom fonts are not accidentally removed.

Fix #122
---
 ios/Utils/RCTConvert+RNSVG.m | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/ios/Utils/RCTConvert+RNSVG.m b/ios/Utils/RCTConvert+RNSVG.m
index 0d841a69..6a4b2236 100644
--- a/ios/Utils/RCTConvert+RNSVG.m
+++ b/ios/Utils/RCTConvert+RNSVG.m
@@ -102,10 +102,23 @@ RCT_ENUM_CONVERTER(RNSVGVBMOS, (@{
     NSDictionary *fontDict = dict[@"font"];
     NSString *fontFamily = fontDict[@"fontFamily"];
     
-    if (![[UIFont familyNames] containsObject:fontFamily]) {
-        fontFamily = nil;
+    BOOL fontFound = NO;
+    NSArray *supportedFontFamilyNames = [UIFont familyNames];
+
+    if ([supportedFontFamilyNames containsObject:fontFamily]) {
+      fontFound = YES;
+    } else {
+      for (NSString *fontFamilyName in supportedFontFamilyNames) {
+        if ([[UIFont fontNamesForFamilyName: fontFamilyName] containsObject:fontFamily]) {
+          fontFound = YES;
+          break;
+        }
+      }
     }
 
+    fontFamily = fontFound ? fontFamily : nil;
+
+
     CTFontRef font = (__bridge CTFontRef)[RCTFont updateFont:nil withFamily:fontFamily size:fontDict[@"fontSize"] weight:fontDict[@"fontWeight"] style:fontDict[@"fontStyle"]
                                                       variant:nil scaleMultiplier:1.0];
     if (!font) {