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Best Practices for Cross-Platform Native Applications
 

Best Practices for Cross-Platform Native Applications

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    Best Practices for Cross-Platform Native Applications Best Practices for Cross-Platform Native Applications Presentation Transcript

    • Best Practices for Cross-Platform Mobile Apps
      Kevin Whinnery
      Engineer and Platform Evangelist
      Appcelerator, Inc.
      @kevinwhinnery
    • Kevin Whinnery
      Engineer and Platform Evangelist
      Appcelerator since 2008
      Husband and father of three:
      Web developer and JavaScript slinger turned mobile and desktop hacker.
      http://kevinwhinnery.com
      http://twitter.com/kevinwhinnery
      http://github.com/kwhinnery
    • Agenda
      • Cross-Platform UI Approaches
      • Component-Oriented Applications
      • Modular JavaScript Techniques
      • Code Walkthrough
    • Cross-Platform in Titanium
      • Cross-Platform !== “Write Once, Run Everywhere”
      • Cross-Platform in Titanium means:
      • 100%* Non-visual code reuse
      • Lots of UI code reuse, depending on design
      • Best-in-class experience on every platform
      • “Write Once, Adapt Everywhere”**
      * This isn’t always true, but we’re working in that direction
      ** Term coined by Yehuda Katz, SproutCore, jQuery, and Rails contributor
    • Cross-Platform Interface Guidelines
      • Maybe we’ll call this the C-PIG (pr. Sea Pig)?
      • The best Titanium applications are conscious of their target platforms, and meet user expectations
      • Cross-platform applications are useless unless they blend seamlessly with the best applications on a platform
      • Take the time to learn the UI conventions of the platforms you’re targeting
    • Characteristics of iOS Interfaces
      • Touch centric
      • Gestures are central to hiding complexity
      • Uniformity in UI conventions is encouraged with rich controls and well-defined interaction models
      • HIG is required reading
    • Characteristics of Android Interfaces
      • Touch and hardware interaction
      • Activities are central elements
      • Interfaces are less homogenous
      • Android Interface Guidelines is required reading
    • Reconciling Cross-Platform UIs
      • Focus on the primary task
      • Sketch out an information architecture for apps on all platforms
      • Based on those exercises, pick out the common components for re-use
    • Cross-Platform Approaches
    • Schools of Cross-Platform Thought
      Platform Identity
      Brand Identity
      • Immediately Familiar to platform users
      • Self-evident navigation and interaction models
      • Polished look that makes an app feel like it belongs on the platform
      • Evocative of emotions around the brand
      • Able to create new, engaging experience not seen before
      • Not bound by platform UI conventions
    • Platform Identity: GetGlue
    • The Platform Identity Approach
      • Different designs and interaction models for each app
      • Individual UI components could be reused, the rest would be platform specific
      • Common UI conventions and components are used
      • Win for a developers: 100% non-visual code reuse, and 50% or better UI code reuse
      • Tradeoff: Less reuse, more is done for you (UI controls)
    • Brand Identity: LNJF
    • The Brand Identity Approach
      • UI is almost identical across platforms (immersive UI)
      • Small differences:
      • Android back button support
      • Transitions – iOS: animated transitions, Android: new activities
      • New UI conventions are created and must be learned
      • Win for developers: 100% non-visual code re-use, 80-90% UI code re-use, strong branded experience
      • Tradeoff: More reuse, less is done for you
    • Which Approach is Right For You?
      • Depends on the primary goal of your app
      • If speed, data interaction, and utility are core to your app, a platform identity approach may be better
      • If emotional connection to brand and engagement are most important, a brand identity approach may be better
    • Component-Oriented Applications
    • Component-Oriented… What’s That?
      • A large app is made up of 100s of smaller, self-contained pieces
      • Really, just good OOP
      • Regardless of your cross-platform approach, this style of thinking and programming is important
    • Advantages of a Component Arch.
      • 100 small pieces are easier to understand and debug than 20 very large pieces
      • Easier to handle orientation changes
      • Easier to adapt cross-platform
      • Enhances reusability
      • Decouples your application, making it more adaptable to changing requirements
    • Modular JavaScript Techniques
    • Classic Module Pattern
      • Uses Ti.include to split modules into files
      • Requires steps to avoid polluting the global scope (Namespaces)
      • Can use constructor style or factory style
    • Classic Module Style: Example
    • CommonJS Module Pattern
      • Uses require to split modules into files
      • Secure by default – no self-calling function boilerplate or namespaces (strictly) required
      • Can use constructor style or factory style
    • CommonJS Module Style: Example
    • Walkthrough: Platform Identity Style
    • Questions?
    • Thank You!