Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Mobile Development - BTalk
Search
Sing Jie Lee
January 09, 2013
Technology
1
98
Mobile Development - BTalk
Talks about general iOS development and some mobile stats on BTalk - a mobile messenger.
Sing Jie Lee
January 09, 2013
Tweet
Share
More Decks by Sing Jie Lee
See All by Sing Jie Lee
Infocomm Media Youth Festival 2016 - Career Talk
singjie
0
55
Sprite Kit
singjie
0
56
SiriKit
singjie
0
200
React Native
singjie
1
84
Arduino
singjie
0
41
Software Engineering
singjie
0
51
Advanced Core Data
singjie
0
38
Amazon Echo and Home Integration
singjie
0
100
CS3216 Garena Project X
singjie
0
49
Other Decks in Technology
See All in Technology
混合雲環境整合異質工作流程工具運行關鍵業務 Job 的經驗分享
yaosiang
0
120
React19.2のuseEffectEventを追う
maguroalternative
2
570
「改善」ってこれでいいんだっけ?
ukigmo_hiro
0
380
AI時代、“平均値”ではいられない
uhyo
3
460
HonoとJSXを使って管理画面をサクッと型安全に作ろう
diggymo
0
150
OpenTelemetry が拡げる Gemini CLI の可観測性
phaya72
2
970
webpack依存からの脱却!快適フロントエンド開発をViteで実現する #vuefes
bengo4com
0
1.1k
LLMプロダクトの信頼性を上げるには?LLM Observabilityによる、対話型音声AIアプリケーションの安定運用
ivry_presentationmaterials
0
730
生成AI時代のセキュアコーディングとDevSecOps
yuriemori
0
140
「最速」で Gemini CLI を使いこなそう! 〜Cloud Shell/Cloud Run の活用〜 / The Fastest Way to Master the Gemini CLI — with Cloud Shell and Cloud Run
aoto
PRO
0
140
だいたい分かった気になる 『SREの知識地図』 / introduction-to-sre-knowledge-map-book
katsuhisa91
PRO
0
500
「魔法少女まどか☆マギカ Magia Exedra」の多様なバトルの開発を柔軟かつ効率的に実現するためのPure C#とUnityの分離について
gree_tech
PRO
0
180
Featured
See All Featured
[RailsConf 2023] Rails as a piece of cake
palkan
57
5.9k
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.5k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
190
55k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
48
9.7k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
The Invisible Side of Design
smashingmag
302
51k
Making the Leap to Tech Lead
cromwellryan
135
9.6k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
12
1.2k
It's Worth the Effort
3n
187
28k
GraphQLの誤解/rethinking-graphql
sonatard
73
11k
Building Better People: How to give real-time feedback that sticks.
wjessup
369
20k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
34
2.5k
Transcript
Mobile Development Monday, January 21, 13
Agenda • Lifecycle of App • Mobile Design Principles •
Responsive • Memory Management • Network • Maintainability • Other Stuffs Monday, January 21, 13
Lifecycle of an App Monday, January 21, 13
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Free up memory Disconnect Reconnect Monday, January 21, 13
Mobile Design Principles • Performance • Responsiveness • Optimal memory
usage • Network • Maintainability Monday, January 21, 13
Responsiveness • Never block the main thread • Always dispatch
complex data handling to background threads • Utilize cache Monday, January 21, 13
Responsiveness • Image Processing User selects a picture Process Image
Main Thread Update UI Background Monday, January 21, 13
Example: Image Processing BBImageLoop::Post(^{ processedImage = ImageProcessor.Process(image); BBUILoop::Post(^{ [self updateUI:processedImage];
}); }); User selects a picture Process Image BBUILoop Update UI BBImageLoop Monday, January 21, 13
Responsiveness • Queues • BBUILoop • BBSoundLoop • BBImageLoop •
BBDLCoreData • BBDBLoop Monday, January 21, 13
Responsiveness • Queues/Operations are cancelable // Sending out Request tcp.requestNearbyBuddies();
handler = BBUILoop::DelayPost(^{ showTimeoutScreen(); }, 5000); ... ... // Response received BBUILoop::Cancel(handler); Monday, January 21, 13
• Queues • Use one queue per subsystem • Know
your queues / threads • Can be cancelled Responsiveness Monday, January 21, 13
Memory Management User Experience Low Memory Usage Monday, January 21,
13
Memory Management User Experience Low Memory Usage App is Active
Monday, January 21, 13
Memory Management User Experience Low Memory Usage App is in
Background/Suspended Monday, January 21, 13
Memory Management • Active? • Use comfortably, but be practical
• Inactive/Background? • Free up memory as much as possible • If not, Apple kills you in background Monday, January 21, 13
Anything lesser than that is a good gauge Memory Management
Apps in Background Monday, January 21, 13
Optimal Memory Usage • Stay SAFE in background • Utilize
system’s memory warning • Ensure no memory leaks Monday, January 21, 13
Use Instruments Monday, January 21, 13
Use Instruments Monday, January 21, 13
Network • Minimize network requests • Timeout is necessary •
Always assume: Network is BAD Monday, January 21, 13
Network Monday, January 21, 13
Network • Bad network : Delays • Prevent sending out
same requests before timeout • Cache responses Monday, January 21, 13
• Bad network : Disconnect • Queue critical requests •
Fast / Safe Queue • Resend requests after reconnection • Requestid is essential Network Monday, January 21, 13
• Fast Queue • Safe Queue Network Client Client Server
Server Monday, January 21, 13
• Fast Queue • Safe Queue Network Client Client Server
Server Chats Daily Life Monday, January 21, 13
Maintainability • Modular Code • Easy to Read • Proper
class/method names Monday, January 21, 13
Maintainability • BTalk is built on modular code Core Network
FileSystem MediaEngine ... DailyLife ... Video Draw Monday, January 21, 13
Added by Daily Life Plugin Monday, January 21, 13
Added by Plugins Monday, January 21, 13
Maintainability Core Network FileSystem MediaEngine ... DailyLife ... Video Draw
Plugin Manager register get Monday, January 21, 13
Some other stuffs la Monday, January 21, 13
Tracker • PivotalTracker • Schedule management tool cum bugs tracker
• Manages schedule for you • Generate Weekly Report Monday, January 21, 13
PivotalTracker Monday, January 21, 13
PivotalTracker • Generated Weekly Report and Schedule Monday, January 21,
13
Insights on Mobile Stats Monday, January 21, 13
Insights on Mobile Stats • Uses Flurry SDK • ~20kB
per session • Client stats collection is needed Monday, January 21, 13
Number of Sessions Monday, January 21, 13
Median Session Length Monday, January 21, 13
Session Length Monday, January 21, 13
User Paths Monday, January 21, 13
User Paths Monday, January 21, 13
Thank You 谢谢 Always write human readable code Monday, January
21, 13