Category: Xcode

Xcode is Apple’s integrated development environment for macOS, used to develop software for macOS, iOS, iPadOS, watchOS, and tvOS.

macOS app basic entitlements file

Recently, I have submitted a macOS app on the app store where I used this entitlements file. This uses sandbox, allowing the app to call API to a remote server and select files from the user computer.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>com.apple.security.app-sandbox</key>
	<true/>
	<key>com.apple.security.files.user-selected.read-only</key>
	<true/>
	<key>com.apple.security.network.client</key>
	<true/>
	<key>com.apple.security.personal-information.photos-library</key>
	<false/>
</dict>
</plist>

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November 14, 2020

SwiftUI combine rectangle and triangle in shape

Making custom shape is not hard in SwiftUI by implementing func path(in rect: CGRect) -> Path. You just have to draw points in your desired location in 2D coordinate space by path.move() and path.addLine() func, a line will be drawn automatically.

struct MomentumArrow: Shape {
    
    func path(in rect: CGRect) -> Path {
        var path = Path()
        
        let squareHeight = rect.height * 0.65
        
        // Rect
        path.move(to: CGPoint(x: 0, y: 0))
        path.addLine(to: CGPoint(x: 0, y: squareHeight))
        path.addLine(to: CGPoint(x: rect.width, y: squareHeight))
        path.addLine(to: CGPoint(x: rect.width, y: 0))
        path.addLine(to: CGPoint(x: 0, y: 0))
        
        // Triangle
        path.move(to: CGPoint(x: 0, y: squareHeight))
        path.addLine(to: CGPoint(x: rect.midX, y: rect.height))
        path.addLine(to: CGPoint(x: rect.width, y: squareHeight))
    
        return path
    }
    
}

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November 14, 2020

Capture first frame of the video as an image on iOS and macOS in swift

import Foundation
import Cocoa
import AVKit
import AVFoundation

let asset: AVURLAsset = AVURLAsset.init(url: "URL OF ANY VIDEO local/remote")
let imgGenerator: AVAssetImageGenerator = AVAssetImageGenerator.init(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
            
imgGenerator.generateCGImagesAsynchronously(forTimes: [NSValue(time: CMTime.zero)]) { (_, image, _, res, error) in
                
                if error == nil {
                    DispatchQueue.main.async {
                           let imageView = NSImage.init(cgImage: image!, size: NSSize.init(width: 180.0, height: 180.0));
                    }
                } else {
                    DispatchQueue.main.async {
                        // Some other fallback image
                    }
                }
}

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September 1, 2020