Joe Nguyen isthisjoe

Open Xcode. File > New > Package
1. Select Library > Next
2. Choose the location that will be your root folder, enter the Package name > Create
3. Rename the module created for you to something different than the Package and Product name.
4. Under [Package name] > Sources > [Package Name] > [Package Name].swift, replace with this SwiftUI view for later use:

import SwiftUI

public struct TestLabel: View {
 public init() {}

	// assume self.managedObjectContext is a main queue context
	NSManagedObjectContext *backgroundContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
	[backgroundContext performBlock:^{
	// do your fetch - e.g. executeFetchRequest
	NSManagedObjectID *objID = [someManagedObject objectID];
	[self.managedObjectContext performBlock:^{
	NSManagedObject *mainManagedObject = [self.managedObjectContext objectWithID:objID];
	// do something now with this managed object in the main context
	}];
	}];

	- (void)setupRefreshControl
	{
	UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
	refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull to refresh"];
	[refreshControl addTarget:self
	action:@selector(refreshControlAction:)
	forControlEvents:UIControlEventValueChanged];
	self.refreshControl = refreshControl;
	}

	+ (NSURL)getPreSignedURLForKey:(NSString)key
	{
	AmazonS3Client *s3 = [[AmazonS3Client alloc] initWithAccessKey:kHBAmazonS3AccessKeyID withSecretKey:kHBAmazonS3SecretKey];
	//Set up the request
	S3GetPreSignedURLRequest * request = [[S3GetPreSignedURLRequest alloc] init];
	request.bucket = kHBAmazonS3Bucket;
	request.key = key;
	request.expires = [NSDate dateWithTimeIntervalSinceNow:(NSTimeInterval)kHBAmazonPreSignedRequestExpireSeconds];
	NSURL *url = [s3 getPreSignedURL: request];
	return url;

	:: Swift iOS Version Checking ::

	let iOS7 = floor(NSFoundationVersionNumber) <= floor(NSFoundationVersionNumber_iOS_7_1)
	let iOS8 = floor(NSFoundationVersionNumber) > floor(NSFoundationVersionNumber_iOS_7_1)

	:: Replace Magic Strings with Enumerations in Swift ::

	enum SegueIdentifier: String {
	case OtherScreenSegue1 = "otherScreenSegue1"
	case OtherScreenSegue2 = "otherScreenSegue2"

	:: UIAlertController ::

	let alertController = UIAlertController(title: "Default Style", message: "A standard alert.", preferredStyle: .Alert)

	let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { (action) in
	// ...
	}
	alertController.addAction(cancelAction)

	let destroyAction = UIAlertAction(title: "Destroy", style: .Destructive) { (action) in

	import AppKit
	import AVFoundation

	class MovieWriter: NSObject {
	func writeImagesAsMovie(_ allImages: [NSImage], videoPath: String, videoSize: CGSize, videoFPS: Int32) {
	// Create AVAssetWriter to write video
	guard let assetWriter = createAssetWriter(videoPath, size: videoSize) else {
	print("Error converting images to video: AVAssetWriter not created")
	return
	}