kmpdfkit_demo/ios/Classes/CompdfkitFlutterPlugin.m

#import "CompdfkitFlutterPlugin.h"
#import "FLNativeView.h"

#import <ComPDFKit/ComPDFKit.h>

@implementation CompdfkitFlutterPlugin

+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
    
  FlutterMethodChannel* channel = [FlutterMethodChannel
      methodChannelWithName:@"com.compdfkit.flutter.plugin"
            binaryMessenger:[registrar messenger]];
  CompdfkitFlutterPlugin* instance = [[CompdfkitFlutterPlugin alloc] init];

  [registrar addMethodCallDelegate:instance channel:channel];
    
  FLNativeViewFactory* factory =
  [[FLNativeViewFactory alloc] initWithMessenger:registrar.messenger];
    [registrar registerViewFactory:factory withId:@"com.compdfkit.flutter.pdfviewer"];
}

- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
  if ([@"sdk_version_code" isEqualToString:call.method]) {
    result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
  } else if ([@"init_sdk" isEqualToString:call.method]) {
//      NSDictionary *initInfo = (NSDictionary *)call.arguments;
//      NSString *key = initInfo[@"key"] ?: @"";
//      NSString *secret = initInfo[@"secret"] ?: @"";
      [CPDFKit setLicenseKey:@"rgFNqsZykKZ9g+uUEl59uYolfyQQha7hfKF3ojzs41pP3PBGfzPS/9CMwsBkJsqNBfULy7kBiUGXelugMdloJ+DWqE5Zjt4+xP6t2paXuFOPX/uXy6G/9vZkuEGSIFfBpUzrCgcXs4xxh8k5+sAfW+EA7DvUgt7u0CcPRyqr1Jg=" secret:@"mG0c3O3Mzeu5dkZJW3gpqiAYrD3HuVAh2a+2rjOsIRhyTBaXPgPRGke3LtDII3XZqZRGhToxzSR51pXlzib4f0WpLOaOv47bs7x+UqfQzn9hrp9sGpqfp0B228KI+IMTu4aGVjtYuk+Uxs/kosIBwyVLBY93oKLBB8UJg4t07605BGbaBKUlDopA0iGq1HSncUNNe38VRnoTm6ibgXyIGz5dhD0tvZsf2Vt2my9XP/2scnSpUeS12jwHQXiCsaaK/oKTJGcYKLPGdXenrzHolQ=="];
  }else {
    result(FlutterMethodNotImplemented);
  }
}

@end