kmpdfkit_demo/example/ios/Runner/AppDelegate.m

#import "AppDelegate.h"
#import "GeneratedPluginRegistrant.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  [GeneratedPluginRegistrant registerWithRegistry:self];
  // Override point for customization after application launch.
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"developer_guide_ios" ofType:@"pdf"];
    NSString *documentFolder = [NSHomeDirectory() stringByAppendingFormat:@"/%@/%@", @"Documents",@"Samples"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:documentFolder])
        [[NSFileManager defaultManager] createDirectoryAtURL:[NSURL fileURLWithPath:documentFolder] withIntermediateDirectories:YES attributes:nil error:nil];

    NSString * documentPath = [documentFolder stringByAppendingPathComponent:filePath.lastPathComponent];
    if (![[NSFileManager defaultManager] fileExistsAtPath:documentPath])
        [[NSFileManager defaultManager] copyItemAtURL:[NSURL fileURLWithPath:filePath] toURL:[NSURL fileURLWithPath:documentPath] error:nil];
  return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

@end