Talks I've Given

利用简单的逆向来解决GCD崩溃

我们平时在开发过程中，偶尔会遇到一些崩溃日志，看到堆栈就想放弃的，例如下面这个，很明显的野指针崩溃，但是不知道崩溃在哪里

04 Jul 2017

RSA 入门介绍及应用

RSA算法基于一个十分简单的数论事实：将两个大质数相乘十分容易，但是想要对其乘积进行因式分解却极其困难，因此可以将乘积公开作为加密密钥

26 Oct 2016

Playing Online Audio in iOS

Though we are talking about using AVPlayer（iOS） for playing online audio here, I found that if the server-side has the wrong configuration, Android might have the same problem, too.

13 Jun 2016

UIKit-ViewAppear/Disappear

Sometimes we are confused about the firing of viewAppear/Disappear.

Basically, they are fired when super-view is on-screen/off-screen. (You can set a breakpoint to check the stack)

What’s more, we feel like some ViewControllers just don’t get the viewAppear/Disappear message, we can find out why.

Don’t AddSubview Before ParentViewController Appear ?

Occasionally we have logics in viewDidAppear like adding a observer & remove it in viewDidDisappear.

** Don’t do it in WillAppear/WillDisappear, because they are not pairing fired in some circumstance.**

e.g. During interactive transitioning

27 Apr 2016

ICPatternLock

ICPatternLock is a screen lock for your app access. It’s familiar to most people and intuitively clear, because a pattern is much more easy to remember. What is more, it’s also convenient for developers to use, of course, and to extend.

Pod is supported, try to add this to your Podfile

    pod 'ICPatternLock', :git => 'https://github.com/IvanChan/ICPatternLock.git'

Convenience Usage

If you don’t care much about the view display and some interactions, just use the ICPatternLockManager to present the pattern lock and receive the result. Of cource you can cusomize your GUI(e.g. color & text & preference) in this way. </br>All what you need to do is just run your logic in the callback block. </br>Check out the Demo Project to experience this.

25 Nov 2015

Hello World

Finally show up here. I'm still a idiot with Jekyll. So let's do this classically.

26 Jan 2014