Paul Wood III PaulWoodIII

Fixer of Explicitly Unwrapped Optionals, Cocoa Developer for hire

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PaulWoodIII / IdentifiableAlertView.swift

Created August 3, 2019 22:59

An example of a complex SwiftUI Alert view using and Identifiable binding

	//: [Previous](@previous)

	import SwiftUI
	import PlaygroundSupport

	enum AlertTypes: String, Identifiable {

	case simple = "A Simple Alert"

	case complex = "A Complex Alert"

PaulWoodIII / SimpleIdentifiableList.swift

Created August 3, 2019 23:19

A Simple list that uses the Identifiable protocol

	import SwiftUI
	import PlaygroundSupport

	struct Name: Identifiable, ExpressibleByStringLiteral {
	var name: String
	public init(stringLiteral value: Swift.StringLiteralType) {
	self.name = value
	}
	var id: String { return name }
	}

PaulWoodIII / SwiftUI_List.swift

Created August 3, 2019 23:50

The Interface of List we are using

	public struct List<SelectionValue, Content> : View where SelectionValue : Hashable, Content : View {
	public init(selection: Binding<Set<SelectionValue>>?, @ViewBuilder content: () -> Content)
	}

PaulWoodIII / NameHolder_Generic.swift

Created August 4, 2019 00:02

A sneaky addition, we can use generics to help us write this initializer for all types of Nameable

	struct NameHolder: Nameable {
	var id: String { return name }
	var name: String

	init<U>(nameable name: U) where U: Nameable {
	self.name = name.name
	}
	}

PaulWoodIII / ListOfAnimals.swift

Created August 4, 2019 13:26

How to solve rendering a Heterogeneous collection when you are required to use a Homogeneous List of Objects in SwiftUI, In short use a Wrapper / Box around the content

	//
	// ListOfAnimals.swift
	// AnimalList
	//
	// Created by Paul Wood on 8/4/19.
	// Copyright © 2019 Paul Wood. All rights reserved.
	//

	import SwiftUI

PaulWoodIII / BreakingSwiftUIList.swift

Created August 5, 2019 01:11

It isn't hard to find some numbers that will cause SwiftUI to break down a little

	struct Item: View, Identifiable {
	let forInt: Int
	var id: String {
	return "\(forInt)"
	}
	var body : some View {
	//: Make this view more complex
	HStack{
	Text("\(forInt)")
	}

PaulWoodIII / New Property Wrapper Syntax.swift

Created August 5, 2019 11:47

Some new APIs are available to us in SwiftUI dealing with Core Data

	@Environment(\.managedObjectContext) var managedObjectContext
	@FetchRequest(fetchRequest: YearOfBirth.allFetchRequest()) var years: FetchedResults<YearOfBirth>

PaulWoodIII / NamesByYearView.swift

Created August 6, 2019 13:46

creating a FetchRequest property based on state passed to a view

	//
	// NamesByYearView.swift
	// NameList
	//
	// Created by Paul Wood on 7/31/19.
	// Copyright © 2019 Paul Wood. All rights reserved.
	//

	import SwiftUI
	import CoreData

PaulWoodIII / NamesByYearView+FetchedResultContainer.swift

Created August 6, 2019 15:03

right to the edge of where I think things should work I get a EXC_BAD

	//
	// NamesByYearView.swift
	// NameList
	//
	// Created by Paul Wood on 7/31/19.
	// Copyright © 2019 Paul Wood. All rights reserved.
	//

	import SwiftUI
	import CoreData

PaulWoodIII / FetchedResultWidget.swift

Last active January 7, 2022 11:36

FetchRequest generation when sort state is changed

	import SwiftUI
	import CoreData
	import Combine

	struct NamesByYearView: View {

	@EnvironmentObject var coreDataStack: CoreDataStack
	@Environment(\.managedObjectContext) var managedObjectContext
	@EnvironmentObject var importer: NameDatabaseImporter

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