王轲－唱吧iOS客户端的架构演进

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1、唱吧iOS客户端的架构演进王轲唱吧iOS架构师Aboutme•王轲，唱吧iOS架构师•之前是iOS独立开发者，个人应用在全球拥有2000w+次下载•6年iOS开发经验Aboutktv.app•Feed流•榜单•点歌台•音视频录制•语音包房•群组•聊天Mistakesinktv.app•View•ViewController•Model•HTTPNetworking•Graphics•AudioView-WaterfallView-WaterfallCTOiOSEngineerView-Waterfall•Choosetherig

2、httechnique•UICollectionViewBasedwaterfallview•Pinshapelayout•ReusecelltogethigherFPSView-MassiveCell•Text/Image/Voice/GIF…14types•Massivechatcell•Single/groupchat•Incoming/Outgoingmessage•If/elsepyramid•2000+LoCView-MassiveCellView-MassiveCell•Samebasecell•Incoming/

3、Outgoing•Innerview•14innerviewsubclasses•200LoConaverageView-MassiveCellVC-PreKTV6.0•Hamburger(Drawer)•Viewbasedhierarchy•Highmemoryusage•LowFPS•Buggy•Re-inventwheelsVC-PreKTV6.0•Hamburger(Drawer)•Viewbasedhierarchy•Highmemoryusage•LowFPS•Buggy•Re-inventwheelsVC-KTV6

4、.0+•VCbasedhierarchy•UITabBarController+UINavigationControllerVC-MVC==MassiveViewController•MassiveLoC•Mixedresponsibility•Hardtomaintain•Poorreadability•Buggy•20+VCwith3000+LoCVC-ChildViewController•ReusableVC•Lesscode,lessbug•LoC<2000,700LoConaverage•Eg.KTVKeyboard

5、ViewControllerModel-PreKTV6.0•Uselessdumbmodel•NSDictionarydrivendataflowwithweaktype•Inconsistentdatatypeusage•Model<=>JSON•Buggy•Eg1,if([param[@“songid”]integerValue]==-1){/**blah*/}•Eg2,if(param[@“songid”]isEqualToString:@“1134”]{/**blah*/}Model-Mantle(KTV6.0+)•Op

6、ensourcebyGithub,appliedinGithubforMac•Runtime/KVCbasedModel/JSONconversion•Keypathmapping•NSValueTransformer•StrongtypewithcompilercheckingHTTPNetworking•Nocachecontrol•NoHTTPSsupport,insecureforcriticalAPI•Poordefaulterrorhandling•LowuploadingsuccessrateHTTPNetwork

7、ing•NSURLCachebasedcachecontrol•ValidationModel(ETag)+ExpireModel(max-age)•Doublerequestifneeded•Defaulterrorhandling•SSLPinning•DifferentCDNforvariousuploadingstrategyHTTPNetworking-Uploading•SingleCDN=>MultipleCDN•AntiCDNhijacking•Auto-switchinguploadtarget•Pingtes

8、t•Serverpreferredtarget•Uploadinghistory•Autoretrysupport•Successrate:83%=>98%Graphic-LyricView•CoreGraphics=>CoreAnimation•CPUboun