first commit

node_modules/react-native-screens/ios/utils/NSString+RNSUtility.mm

@@ -0,0 +1,37 @@
+#import "NSString+RNSUtility.h"
+
+@implementation NSString (RNSUtility)
+
++ (BOOL)rnscreens_isBlankOrNull:(NSString *)string
+{
+  if (string == nil) {
+    return YES;
+  }
+  return [[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0;
+}
+
++ (BOOL)rnscreens_isEmptyOrNull:(NSString *)string
+{
+  if (string == nil) {
+    return YES;
+  }
+  return [string length] == 0;
+}
+
++ (nullable NSString *)rnscreens_stringOrNilIfBlank:(NSString *)string
+{
+  if ([NSString rnscreens_isBlankOrNull:string]) {
+    return nil;
+  }
+  return string;
+}
+
++ (nullable NSString *)rnscreens_stringOrNilIfEmpty:(NSString *)string
+{
+  if ([NSString rnscreens_isEmptyOrNull:string]) {
+    return nil;
+  }
+  return string;
+}
+
+@end