perlguy99

SwiftUI Button & TextField Info

First off, an excellent resource is

Mastering Buttons in SwiftUI

TextField in SwiftUI

Don't forget to use the Environment Object if possible!

Some Button basics...

perlguy99

My Favorite Swift Tips & Tricks & Articles

iOS Dev Directory

iOS Dev Directory

Static factory methods in Swift

• Great info on crating test stubs, extensions, etc.
• Shows how to clearly separate setup code from actual logic.
• Shows great alternatives to subclassing

perlguy99

//
//  KeyboardAwareModifier.swift
//  KeyboardTest
//

import SwiftUI
import Combine

struct KeyboardAwareModifier: ViewModifier {
    @State private var keyboardHeight: CGFloat = 0

perlguy99

Semantic versioning (SemVer)

Example

If you look at a version like 1.5.3, then the 1 is considered the major number, the 5 is considered the minor number, and the 3 is considered the patch number.

If developers follow SemVer correctly, then they should:

• Change the patch number when fixing a bug as long as it doesn’t break any APIs or adds features.
• Change the minor number when they added features that don’t break any APIs.
• Change the major number when they do break APIs.

perlguy99

Swift Result

Thanks to Paul Hudson, Hacking with Swift

//
//  ContentView.swift
//  ResultTypeTest
//
//  Created by Michalski (US), James B on 12/12/19.
//  Copyright © 2019 Perlguy, Inc. All rights reserved.

perlguy99

How To Save a UIImage to a file

Thanks to Paul Hudson Hacking with Swift

func getDocumentsDirectory() -> URL {
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    return paths[0]
}

perlguy99

Swift Get Documents Directory

func getDocumentsDirectory() -> URL {
    // find all possible documents directories for this user
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)

    // just send back the first one, which ought to be the only one
    return paths[0]
}

perlguy99

TabView and tabItem()

Thanks to Paul Hudson, 100 Days of SwiftUI

Creating tabs with TabView and tabItem()

Custom Star Rating Component

Adding a custom star rating component

perlguy99

Custom Bindings

Thanks to Paul Hudson

100 Days of SwiftUI

This won't work because the @State property wrapper doesn't actually modify the value directly...

    @State private var blurAmount: CGFloat = 0 {
        didSet {
 print("New value is \(blurAmount)")

perlguy99

Custom Property Wrappers

Many thanks to Paul Hudson!

From 100 Days of SwiftUI

To demonstrate property wrappers, I want to start with a simple struct that wraps some kind of BinaryInteger value. We’re going to give this thing some custom code when it comes to setting its wrapped value, so that if the new value is below 0 we instead make it exactly 0 so that this struct can never be negative.

Our code would look like this:

struct NonNegative<Value: BinaryInteger> {
 var value: Value