perlguy99

xcrun simctl --set previews delete all

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ACTION=build
AD_HOC_CODE_SIGNING_ALLOWED=NO
ALTERNATE_GROUP=staff
ALTERNATE_MODE=u+w,go-w,a+rX
ALTERNATE_OWNER=brent
ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES=NO
ALWAYS_SEARCH_USER_PATHS=NO
ALWAYS_USE_SEPARATE_HEADERMAPS=NO
APPLE_INTERNAL_DEVELOPER_DIR=/AppleInternal/Developer
APPLE_INTERNAL_DIR=/AppleInternal

perlguy99

Alamofire.request(urlString).responseJSON { response in
    guard case let .failure(error) = response.result else { return }

    if let error = error as? AFError {
        switch error {
        case .invalidURL(let url):
            print("Invalid URL: \(url) - \(error.localizedDescription)")
        case .parameterEncodingFailed(let reason):
            print("Parameter encoding failed: \(error.localizedDescription)")
            print("Failure Reason: \(reason)")

perlguy99

HowTo add ViewInspector to a Project

Shout Out!

First off, I need to give a shout out to Jon Reid and Quality Coding. His blog at Quality Coding Blog it was through Jon's posts and live coding sessions where all of this code got fleshed out.

1. Add ViewInspector branch 0.10.0 to your project

• For the Target, choose your Test Target

2. Create a file named TestableView.swift with the following contents:

perlguy99

print(Unmanaged.passUnretained(self).toOpaque())

perlguy99

extension View {
    var previewedInAllColorSchemes: some View {
        ForEach(ColorScheme.allCases, id: \.self, content: preferredColorScheme)
    }
}

perlguy99

iOS Debugging Tips/Tricks/Hints

From SwiftTube Smart Debugging Talk 2018 and Advanced Debugging Techniques

brew install chisel

LLDB View Debugging

perlguy99

SwiftUI

AnyView vs Group: type erasure in practice

SwiftUI in 100 Days

Key Points

• Type erasure is the process of hiding the underlying type of some data.
  • This is used often in Swift: we have type erasing wrappers such as AnyHashable and AnySequence, and all they do is act as shells that forward on their operations to whatever they contain, without revealing what the contents are to anything externally.

perlguy99

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

import SwiftUI
import Combine

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

perlguy99

To take a video

xcrun simctl io booted recordVideo <filename>.<file extension>

For example:

xcrun simctl io booted recordVideo appVideo.mov

Press ctrl + c to stop recording the video.