How to build React Native package in Swift? - ios

Question

I wanna build React Native iOS PhotoEditor module in Swift.
I simply created a new library using react-native-create-library and modified the iOS module like this.
For now, I just wanna push a simple UIViewController.
I followed Native Modules Guideline of React Native but I am getting error while launching the app.
I attached the screenshot of the structure, full codes and error logs.
// RNPhotoEditor.swift
// RNPhotoEditor
//
// Created by Gang on 2/13/19.
// Copyright © 2019 Facebook. All rights reserved.
//
import Foundation
import UIKit
#objc(RNPhotoEditor)
class RNPhotoEditor: NSObject {
#objc func Edit(props: NSDictionary, onDone: RCTResponseSenderBlock, onCancel: RCTResponseSenderBlock) -> Void {
let editorVC = PhotoEditorViewController()
getRootVC().present(editorVC, animated: true, completion: nil)
}
func getRootVC() -> UIViewController {
var root = UIApplication.shared.keyWindow?.rootViewController
while root?.presentedViewController != nil {
root = root?.presentedViewController
}
return root!
}
}
//
// RNPhotoEditorBridge.m
// RNPhotoEditor
//
// Created by Gang on 2/13/19.
// Copyright © 2019 Facebook. All rights reserved.
//
#import <React/RCTBridgeModule.h>
#interface RCT_EXTERN_MODULE(RNPhotoEditor, NSObject)
RCT_EXTERN_METHOD(Edit:(nonnull NSDictionary *)props onDone:(RCTResponseSenderBlock)onDone onCancel:(RCTResponseSenderBlock)onCancel)
#end
//
// RNPhotoEditor-Bridging-Header.h
// RNPhotoEditor-Bridging-Header
//
// Created by Gang on 2/13/19.
// Copyright © 2019 Facebook. All rights reserved.
// Use this file to import your target's public headers that you would like to expose to Swift.
//
#import <React/RCTBridgeModule.h>
Here is the error log.
ld: warning: directory not found for option '-L/Users/gang/Library/Developer/Xcode/DerivedData/app-ezczldbbkpyqcxaeyxheyjdtqbth/Build/Products/Debug-iphoneos/React'
ld: warning: object file (/Users/gang/Library/Developer/Xcode/DerivedData/app-ezczldbbkpyqcxaeyxheyjdtqbth/Build/Products/Debug-iphoneos/libLRDRCTSimpleToast.a(UIView+Toast.o)) was built for newer iOS version (9.3) than being linked (9.0)
ld: warning: object file (/Users/gang/Library/Developer/Xcode/DerivedData/app-ezczldbbkpyqcxaeyxheyjdtqbth/Build/Products/Debug-iphoneos/libLRDRCTSimpleToast.a(LRDRCTSimpleToast.o)) was built for newer iOS version (9.3) than being linked (9.0)
ld: warning: Could not find auto-linked library 'swiftCoreGraphics'
ld: warning: Could not find auto-linked library 'swiftFoundation'
ld: warning: Could not find auto-linked library 'swiftMetal'
ld: warning: Could not find auto-linked library 'swiftDarwin'
ld: warning: Could not find auto-linked library 'swiftUIKit'
ld: warning: Could not find auto-linked library 'swiftObjectiveC'
ld: warning: Could not find auto-linked library 'swiftCoreFoundation'
ld: warning: Could not find auto-linked library 'swiftDispatch'
ld: warning: Could not find auto-linked library 'swiftCoreImage'
ld: warning: Could not find auto-linked library 'swiftQuartzCore'
ld: warning: Could not find auto-linked library 'swiftCore'
ld: warning: Could not find auto-linked library 'swiftSwiftOnoneSupport'
Undefined symbols for architecture arm64:
"value witness table for Builtin.UnknownObject", referenced from:
full type metadata for RNPhotoEditor.PhotoEditorViewController in libRNPhotoEditor.a(PhotoEditorViewController.o)
full type metadata for RNPhotoEditor.RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
"(extension in Foundation):Swift.String._bridgeToObjectiveC() -> __C.NSString", referenced from:
RNPhotoEditor.PhotoEditorViewController.init(nibName: Swift.String?, bundle: __C.NSBundle?) -> RNPhotoEditor.PhotoEditorViewController in libRNPhotoEditor.a(PhotoEditorViewController.o)
"static (extension in Foundation):Swift.String._unconditionallyBridgeFromObjectiveC(__C.NSString?) -> Swift.String", referenced from:
#objc RNPhotoEditor.PhotoEditorViewController.init(nibName: Swift.String?, bundle: __C.NSBundle?) -> RNPhotoEditor.PhotoEditorViewController in libRNPhotoEditor.a(PhotoEditorViewController.o)
"(extension in Foundation):Swift.Array._bridgeToObjectiveC() -> __C.NSArray", referenced from:
reabstraction thunk helper from #callee_unowned #convention(block) (#unowned __C.NSArray?) -> () to #escaping #callee_guaranteed (#guaranteed [Any]?) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"Swift._fatalErrorMessage(_: Swift.StaticString, _: Swift.StaticString, file: Swift.StaticString, line: Swift.UInt, flags: Swift.UInt32) -> Swift.Never", referenced from:
RNPhotoEditor.RNPhotoEditor.getRootVC() -> __C.UIViewController in libRNPhotoEditor.a(RNPhotoEditor.o)
"type metadata for Any", referenced from:
reabstraction thunk helper from #callee_unowned #convention(block) (#unowned __C.NSArray?) -> () to #escaping #callee_guaranteed (#guaranteed [Any]?) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"__swift_FORCE_LOAD_$_swiftCoreFoundation", referenced from:
__swift_FORCE_LOAD_$_swiftCoreFoundation_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftCoreFoundation_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftCoreFoundation_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftCoreGraphics", referenced from:
__swift_FORCE_LOAD_$_swiftCoreGraphics_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftCoreGraphics_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftCoreGraphics_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftCoreImage", referenced from:
__swift_FORCE_LOAD_$_swiftCoreImage_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftCoreImage_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftCoreImage_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftDarwin", referenced from:
__swift_FORCE_LOAD_$_swiftDarwin_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftDarwin_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftDarwin_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftDispatch", referenced from:
__swift_FORCE_LOAD_$_swiftDispatch_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftDispatch_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftDispatch_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftFoundation", referenced from:
__swift_FORCE_LOAD_$_swiftFoundation_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftFoundation_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftFoundation_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftMetal", referenced from:
__swift_FORCE_LOAD_$_swiftMetal_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftMetal_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftMetal_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftObjectiveC", referenced from:
__swift_FORCE_LOAD_$_swiftObjectiveC_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftObjectiveC_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftObjectiveC_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftQuartzCore", referenced from:
__swift_FORCE_LOAD_$_swiftQuartzCore_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftQuartzCore_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftQuartzCore_$_RNPhotoEditor)
"__swift_FORCE_LOAD_$_swiftUIKit", referenced from:
__swift_FORCE_LOAD_$_swiftUIKit_$_RNPhotoEditor in libRNPhotoEditor.a(PhotoEditorViewController.o)
__swift_FORCE_LOAD_$_swiftUIKit_$_RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
(maybe you meant: __swift_FORCE_LOAD_$_swiftUIKit_$_RNPhotoEditor)
"_swift_allocObject", referenced from:
#objc RNPhotoEditor.RNPhotoEditor.Edit(props: __C.NSDictionary, onDone: ([Any]?) -> (), onCancel: ([Any]?) -> ()) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_bridgeObjectRelease", referenced from:
RNPhotoEditor.PhotoEditorViewController.init(nibName: Swift.String?, bundle: __C.NSBundle?) -> RNPhotoEditor.PhotoEditorViewController in libRNPhotoEditor.a(PhotoEditorViewController.o)
outlined consume of Swift.String? in libRNPhotoEditor.a(PhotoEditorViewController.o)
reabstraction thunk helper from #callee_unowned #convention(block) (#unowned __C.NSArray?) -> () to #escaping #callee_guaranteed (#guaranteed [Any]?) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_bridgeObjectRetain", referenced from:
outlined copy of Swift.String? in libRNPhotoEditor.a(PhotoEditorViewController.o)
reabstraction thunk helper from #callee_unowned #convention(block) (#unowned __C.NSArray?) -> () to #escaping #callee_guaranteed (#guaranteed [Any]?) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_deallocObject", referenced from:
l_objectdestroy in libRNPhotoEditor.a(RNPhotoEditor.o)
l_objectdestroy.2 in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_getInitializedObjCClass", referenced from:
type metadata accessor for RNPhotoEditor.PhotoEditorViewController in libRNPhotoEditor.a(PhotoEditorViewController.o)
RNPhotoEditor.RNPhotoEditor.getRootVC() -> __C.UIViewController in libRNPhotoEditor.a(RNPhotoEditor.o)
type metadata accessor for RNPhotoEditor.RNPhotoEditor in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_getObjCClassFromMetadata", referenced from:
__C.UIViewController.__allocating_init() -> __C.UIViewController in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_isaMask", referenced from:
RNPhotoEditor.RNPhotoEditor.Edit(props: __C.NSDictionary, onDone: ([Any]?) -> (), onCancel: ([Any]?) -> ()) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_release", referenced from:
#objc RNPhotoEditor.RNPhotoEditor.Edit(props: __C.NSDictionary, onDone: ([Any]?) -> (), onCancel: ([Any]?) -> ()) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
"_swift_retain", referenced from:
#objc RNPhotoEditor.RNPhotoEditor.Edit(props: __C.NSDictionary, onDone: ([Any]?) -> (), onCancel: ([Any]?) -> ()) -> () in libRNPhotoEditor.a(RNPhotoEditor.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I am really not sure what the following error means.
ld: symbol(s) not found for architecture arm64
Also, how can I clear this kind of warnings?
ld: warning: Could not find auto-linked library 'swiftUIKit'
Can someone please tell me how to write Swift iOS library for React Native? I am struggling for a couple of days but no luck.
I'd appreciate any help! Thanks.