Archy archywillhe

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

Extension:

import Foundation
import UIKit

extension UIColor {
    convenience init(hexString: String) {
        let hex = hexString.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        var int = UInt32()
 Scanner(string: hex).scanHexInt32(&amp;int)

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

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

	#include <iostream>
	#include <set>
	#include <vector>
	#include <cmath>

	using namespace std;

	typedef pair<long long, long long> pii;
	set<pii> pq;

	// Create a UIImage from sample buffer data
	- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer
	{
	// Get a CMSampleBuffer's Core Video image buffer for the media data
	CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);

	// Lock the base address of the pixel buffer
	CVPixelBufferLockBaseAddress(imageBuffer, 0);

	// Get the number of bytes per row for the pixel buffer