Ben Yang Liu

Projects

[iOS/Android] Australian Slang

A MUST have app while travelling and living in Australia

iOS

Export IPA file from Xcode and install on your mobile

Generate ipa from swift xcode, install ipa to mobile device

Python

Python package importing explained

Python is a powerful and elegant language which makes people obsessed into it (such as me). However, many of the python users are still confused by two question: 1. package importing 2. encoding and decoding This article will explained the package importing with some simple examples. There are two type

Unity

OnTriggerEnter2D v.s. OnCollisionEnter2D

OnCollisionEnter2D: Some collision really happened, means two objects collide with each other. OnTriggerEnter2D: Collision not really happened when you set up Is Trigger is true. For example, if two objects, one with Is Trigger off (Object A), the other with Is Trigger on (Object B). So Object A can pass

Barcode and QR code Reader

The most fastest & easy-to-use Barcode/QR Reader - download now for FREE! FEATURES * Code Scanner - scans QR codes & barcodes * Support more than 10 formats, includes ISBN, product barcode, QR Code, Wi-Fi barcode, business card, Web URL, wechat, facebook, twitter, event barcode, Passport * Save scanned QR codes or

Mobile

Load local html resource on Android using webView

Local html and sources are necessary when you try to show an error page dealing with situations such as 404, 500 and etc errors happened on remote server. And here is how: First, create a new class named MyWebViewClient: package apeapp.webviewclient.testwebviewclient; import android.os.Build; import android.util.

Mobile

Dive into Android Application Lifecycle – A simple tutorial for iOS developers

Introduction Due to some requirements from work, I was asked to immigrate current iOS product into Android. If you are like me, who are mainly working on iOS, but want to put hands on Android too, this is a post can help you to understand the fundamental concept on Android.

Mobile

Fastlane Practise with Android and iOS (with examples)

Fastlane Features "The easiest way to build and release mobile apps". Which handles the majority of the manual works Fastlane has the following features: * FREE * Build Alpha/Beta/Production binary, ipa for iOS, apk for Android Automatically * Sign ipa using Apple Provision File for iOS Automatically * Sign apk

Python

Manage both Python2 and Python3 on your Mac

Step 1: Install Python3 Use brew install python to install python3 on the mac, current version is Python 3.6.5. If your mac has a python2 already, brew will ask for an upgrade, which is fine. # Going to install python3 brew install python # Going to upgrade brew upgrade python

MySQL

MySQL: ERROR 1071 (42000) at line: Specified key was too long; max key length is 767 bytes

When I was doing the development with a recent project, I found out this err: Error: ERROR 1071 (42000) at line 50: Specified key was too long; max key length is 767 bytes See here is one of my model class with url as an unique string. As UTF8 is

Other

Create an Auto build script for Aseprite on Mac OS

Aseprite is a famous 2D pixel art tool that allow you to create 2D animations, sprites, and any kind of graphics for games. It is not free, you can get a copy from Steam for USD $14.99. http://store.steampowered.com/app/431730/Aseprite/. However, it is open sourced

Python

Instance method vs. Static method vs. Class method in Python

In a python class, there are three kinds of methods: * Instance method * Static method * Class method Example explained Look at the following code, have a test for yourself, what are the output: class Foo(object): variable = 1 def method(self, param): print "run instance method (%s,%s)" % (self,

Mobile

Key-Value Coding and Key-Value Observing in Objective-C

What is KVO/KVC KVC(Key-Value Coding) is a coding style which coming from Functional Programming, KVO(Key-Vlaue Observing) is the technology that underlies Cocoa Bindings, and it provides a way for objects to get notified when the properties of other objects are changed. How does it work To illustrate

Mobile

Singleton in Objective-C/Swift

What is behind the Singleton? Singleton: Instantiation of a class to ONLY one object Features of Singleton: 1. One class only can have only one instance; 2. It must can create this instance automatically; 3. This instance must be provided to other objects. Benefits of Singleton: All objects can only

Python

Get Start with RabbitMQ

RabbitMQ is an open source & enterprise level messsage broker using AMQP protocal. The AMQP protocol is designed for asychronization and message dispatch. RabbitMQ can be used in time-consuming backend jobs such as sending emails to client, generating file for user to download, and so on. Install on Mac brew

API

Authentication in RESTful API

RESTful API is a protocal based on HTTP. Sometimes we want to encrypt the RESTful API content while using. There are three encryption in practise: 1. HTTP Basic Authentication HTTP supported a simple and basic authentication natively, namely put an extra field named Authorization: Basic em1rOjEyMzQ1Ng== in the header. i.

React

OpenSource: react-appstore-button module

react-appstore-button version: 0.0.9 * NPM URL: https://www.npmjs.com/package/react-appstore-button * Github URL: https://github.com/arkilis/react-AppStore-Button What is this? An React component which allows you to create an AppStore Download Button in a few seconds. This button: * Using vector format, svg file , so don’t worry

JavaScript

Iterator and Generator in ES6

Iterator and Generator are commonly used features in ES6. In this post, we will walk through the key features of iterator and generator in depth. Iterator In JavaScript, an object can be iterated due to it has an inner-built property/object: iterator (which objects?). So in order to let an

Objective-C

Method Chaining in Objective-C and how to make your own

When I was using the Masonry, I was shocked by author’s thoughts on bring Functional Programming to objective-c, which present a clean and concise way on developing. Normally a chain method looks like: Method Chaining is simple but powerful, which has three key points, everyone can create his/her

Mobile

viewWillAppear, viewDidAppear, viewDidLoad, viewWillDisappear and viewDidDisappear?

Introduction Before this, let me ask you what is the running order of viewWillAppear, viewDidAppear, viewDidLoad, viewWillDisappear and viewDidDisappear? If you know the answer, please close this webpage and continue your game. :) So a simple piece code is written to verify this: Example code: // // ViewController.m // TestBlock // // Created by Ben

JavaScript

WeApp-jandan 微信小程序–煎蛋

1. 效果图 (Final Screenshot) 2. 功能 (Features)： * 无聊图 * 段子 * 妹子图 （这个是必须的）Updated: 这个已经被煎蛋取消了 * 投票 Github 地址: https://github.com/arkilis/weapp-jandan 3. 声明 (Disclaim) 真机调试不可用，因为，煎蛋的服务器没有正确地配置SSL证书，见谅~~~~ 如果有朋友告知怎么绕过这个证书错误，请告知多谢

Python

Python Teltra SMS SDK

telstra-sms-sdk A fully tested Python SDK allow you to send sms in a more easy way! Current version: 0.0.7 Support Python version: >=python 2.6 (not python3) If you have any questions or issue, please create an issue or pull request. Prerequisite Before you are using this

JavaScript

Get and Set a State in React

State is a JavaScript object that lives inside each of the component, We can aaccess it via this.state. Unlike JQuery and Backbone, DOM is manipulated indirectly in React, which means we don’t modify the DOM directly. Use case scenarios * Button click * Link click First need to setup the

Mobile Featured

Static Library, Dynamic Library and Frameworks in iOS

What you can get from this article: * What are Static Library and Dynamic Library not just in iOS * How do they work (in genertal) Some concepts about library * Reduce coupling: if you want to creat a copy of "public code", you have to reduce uncessary coupling of it.

iOS

Default iOS URL Schemas

The following is a list of default URL Schemas supported natively in iOS (all versions): Objective-C // Make a phone call [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel:12125551212"]]; // Open an url using default brower Safari [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.needone.app"]] // Send an email