[React Native] 設定.appを開くNativeModuleを作った ref: http://qiita.com/betahikaru/items/2b788e84f8d67ac682c0

CalendarManager.m

RCT_EXPORT_MODULE();

RCT_EXPORT_METHOD(canOpenSettingsApp:(RCTResponseSenderBlock)callback)
{
  if (/* iOS8以上? */) {
    /* コールバックに渡す引数は、１つでも配列として渡す必要あり */
    callback(@[true]);
  } else {
    callback(@[false]);
  }
  RCTLogInfo(@"Finish");
}

RCT_EXPORT_METHOD(openSettingsApp:(RCTResponseSenderBlock)callback)
{
  /* 設定.appを開く処理 */
  if (/* 成功 */) {
    callback(@[@true]);
  } else {
    callback(@[@false]);
  }
  RCTLogInfo(@"Finish");
}

@end

file0.m

  NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
  BOOL result = [[UIApplication sharedApplication] openURL:url];
  if (result) { /* 成功 */ } else { /* 失敗 */ }

file1.m

  UIDevice *device = [UIDevice currentDevice];
  NSString *versionStr = [device systemVersion];
  NSString *versionSupportedOpening = @"8.0";
  NSComparisonResult resultCompare = [[device systemVersion]
                                       compare:versionSupportedOpening
                                       options:NSNumericSearch];
  if (resultCompare != NSOrderedDescending) {
    // iOS 8.0 未満
  } else {
    // iOS 8.0 以上
  }

file5.js

var React = require('react-native');
var {
  ...,
  NativeModules,
} = React;

file6.js

var {
  OpenSettingAppModule,
} = NativeModules;

file7.js

OpenSettingAppModule.openSettingsApp((result) => {
  /* 設定.appを開いた後の行いたい処理 */
});

file8.js

var callback = function(result) {
  /* 設定.appを開いた後の行いたい処理 */
}
OpenSettingAppModule.openSettingsApp(callback);

OpenSettingAppModule.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "RCTBridgeModule.h"
#import "RCTLog.h"

@interface OpenSettingAppModule : NSObject<RCTBridgeModule>

@end