Author: Smin Rana

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

    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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  • NSTableView custom highlight color with NSTableRowView

    Getting the right color when you select NSTableView’s row was frustrating for me since I didn’t know how to do it properly. But it is really simple, all you need to do is having a class inherit from NSTableRowView and override its method drawSelection(in dirtyRect: NSRect).

    import Foundation
import Cocoa

class MenuTableRowView: NSTableRowView {

    override func drawSelection(in dirtyRect: NSRect) {
        if self.selectionHighlightStyle != .none {
            let selectionRect = NSInsetRect(self.bounds, 2.5, 2.5)
            
            if let color = NSColor.init(named: NSColor.Name("menu_table_selection_color")) {
                color.setFill()
            }
            
            let selectionPath = NSBezierPath.init(roundedRect: selectionRect, xRadius: 0, yRadius: 0)
            selectionPath.fill()
        }
    }
    
}

    Change menu_table_selection_color value in Assets.xcassets file.

    Custom NSTableRowView

    Now go to your NSTableViewDelegate’s method add your custom NSTableRowView.

     func tableView(_ tableView: NSTableView, rowViewForRow row: Int) -> NSTableRowView? {
        return MenuTableRowView()
}

    Here you can see how my Storyboard looks like. Table view highlight value must be regular.

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  • This app is not allowed to query for scheme fb in iOS

    This app is not allowed to query for scheme fb in iOS

    I wanted to open a Facebook Group page in the Facebook app on my iPhone but I was getting that error since I did not have any LSApplicationQueriesSchemes in my Info.plist file.

    This is the code

    let fbPage = "fb://profile/" + FB_GROUP_ID // Your Facebook group id e.g 8794808798015
let fbURL = URL(string:fbPage)
let canOpenURL = UIApplication.shared.canOpenURL(fbURL!)
if (canOpenURL) {
    UIApplication.shared.open(fbURL!, completionHandler: nil)
}

    After adding ‘fb’ in my scheme it solves the issue.

    My Info.plist file

    This app is not allowed to query for scheme
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