iOS, Android, Flutter and React Native Blog

Author: Nafiz

  • SwiftUI combine rectangle and triangle in shape

    SwiftUI combine rectangle and triangle in shape

    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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  • First Git Commit in GitHub

    First Git Commit in GitHub

    Git is very important tool for all kinds of software development and source code management. To make your first git commit in GitHub actually not that hard.

    Create A New Repository

    √ Visit https://github.com and signup for a new account. If you already have one, please sign in.

    √ Create a new repository by clicking this link https://github.com/new

    First Commit in GitHub

    Don’t forget to click the “Create repository” button.

    Install git on your computer 

    √ For Windows user click here https://git-scm.com/download/win. After download please install the Git.exe. Make sure Git Bash also gets installed. 

    First Commit in GitHub

    √ For Ubuntu user run this command on your terminal. 

    sudo apt-get install git

    √ For Mac user run this Homebrew command your terminal

    brew install git

    Create an SSH Key and Add in your GitHub

    On Windows open git bash and run command 

    ssh-keygen -t rsa -C "[email protected]"

    On Linux or Mac run terminal and run command 

    ssh-keygen -t rsa -C "[email protected]"

    Give a new file path when it says “Enter file in which to save the key”.  The press enter.

    It will create two keys in your .ssh directory one is private which has no extension and one is public which .pub extension. Now open .pub key in any text editor and select all and copy the content in your clipboard. 

    Go here https://github.com/settings/keys and click the button on the top-right New SSH Key.

    First Commit in GitHub

    Now paste your the content you copied from .pub file and paste in the key. Also give a nice title.

    First Commit in GitHub

    Finally click the button Add SSH Key to finish the process.

    Clone Your Empty Repository

    Now open your repository page and copy the repository url, make sure you select SSH.

    First Commit in GitHub

    Now open your terminal and run command

    git clone git@your_git_url

    in my case it is 

    git clone [email protected]:sminrana/MyFirstRepoOne.git

    Now create a txt file in the MyFirstRepoOne directory and add any text. 

    Run this command to know your git status

    git status

    Mine looks like this, my txt file name is any.txt. 

    Add this txt file in git by running this command

    git add any.txt

    Then run git commit command

    git commit  -m "My first git commit message"

    Finally push your changes to the GitHub server

    git push origin master

    You can download this article as PDF

    Download as PDF

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  • 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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