React Native iOS NativeModule to read a plist as a string

ReadPlist.m

//
//  ReadPlist.m
//

#import <UIKit/UIKit.h>
#import <React/RCTBridgeModule.h>
#import <React/RCTUtils.h>
#import <Foundation/NSData.h>
#import <Foundation/Foundation.h>

@interface ReadPlist : NSObject <RCTBridgeModule>

@end

@implementation ReadPlist

RCT_EXPORT_MODULE();

/*
 // Usage:
 
 const reader = React.NativeModules.ReadPlist;
 
 reader.readRawPlist(path, (error, contents) => {}); 
 // or
 const contents = await reader.readRawPlistPromise(path);
*/

#pragma mark - read raw plist
RCT_EXPORT_METHOD(readRawPlist:(NSString *)localPath :(RCTResponseSenderBlock)callback){
  NSString *asString = [self getPlistAsString:localPath];
  callback(@[[NSNull null], asString]);
}

#pragma mark - promisified read raw plist
RCT_REMAP_METHOD(readRawPlistPromise,
                 localPath:(NSString *)localPath
                 resolver:(RCTPromiseResolveBlock)resolve
                 rejector:(RCTPromiseRejectBlock)reject)
{
  NSError *error = nil;
  @try {
    NSString *asString = [self getPlistAsString:localPath];
    resolve(asString);
  }
  @catch (NSException *exception) {
    NSMutableDictionary * info = [NSMutableDictionary dictionary];
    [info setValue:exception.name forKey:@"ExceptionName"];
    [info setValue:exception.reason forKey:@"ExceptionReason"];
    [info setValue:exception.callStackReturnAddresses forKey:@"ExceptionCallStackReturnAddresses"];
    [info setValue:exception.callStackSymbols forKey:@"ExceptionCallStackSymbols"];
    [info setValue:exception.userInfo forKey:@"ExceptionUserInfo"];
    error = [[NSError alloc] initWithDomain:@"react-native-read-plist" code:1 userInfo:info];
    reject(@"read_plist_promise", @"read Plist error", error);
  }
}

- (NSString *)getPlistAsString: (NSString *)localPath {
  NSData *data = [NSData dataWithContentsOfFile:localPath];
  NSError *error = nil;
  id plistFile = [NSPropertyListSerialization propertyListWithData:data options:0 format:NULL error:&error];
  NSData *asXML = [NSPropertyListSerialization dataWithPropertyList:plistFile format:NSPropertyListXMLFormat_v1_0 options:0 error:&error];
  NSString *asString = [[NSString alloc] initWithData:asXML encoding:NSUTF8StringEncoding];
  return asString;
}

@end