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TVML Myths: or why you shouldn't write TVML off...
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sammyd
August 23, 2016
Programming
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TVML Myths: or why you shouldn't write TVML off... yet
Presented at 360|iDev 2016.
sammyd
August 23, 2016
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Transcript
TVML Myths or why you shouldn't write TVML off... yet
Sam Davies | @iwantmyrealname | 360|iDev 2016
What is TVML?
Why is TVML so misunderstood?
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
You have to use a server
demo
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
You write TVML in JavaScript strings
Sample Code App.onLaunch = function(options) { var template =
'<document>' + '<loadingTemplate>' + '<activityIndicator>' + '<text>Hello World!</text>' + '</activityIndicator>' + '</loadingTemplate>' + '</document>'; var templateParser = new DOMParser(); var parsedTemplate = templateParser.parseFromString(template, "application/xml"); navigationDocument.pushDocument(parsedTemplate); }
In-bundle TVML 4 TVML engine just processes text 4 Doesn't
care where it comes from 4 Server offers advantages, but not required
demo
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
Layout includes data
<infoList> <info> <header> <title>Presenter</title> </header> <text>Sam Davies</text> </info> <info> <header>
<title>Tags</title> </header> <text>Short</text> <text>Glasses</text> <text>Funny Accent</text> </info> </infoList> <stack> <title>Droning-On II: Return of the Tedium</title> </stack>
the entirety of JavaScript at your fingertips
!
Templating Engine
{{MUSTACHE}}
class ResourceLoaderJS { ... getDocument(name) { var docString = this.nativeResourceLoader.loadBundleResource(name);
return this.domParser.parseFromString(docString, "application/xml"); } }
class ResourceLoaderJS { ... getDocument(name, data) { data = data
|| {}; var docString = this.nativeResourceLoader.loadBundleResource(name); var rendered = Mustache.render(docString, data); return this.domParser.parseFromString(rendered, "application/xml"); } }
class ResourceLoaderJS { ... getDocument(name, data) { data = data
|| {}; var docString = this.nativeResourceLoader.loadBundleResource(name); var rendered = Mustache.render(docString, data); return this.domParser.parseFromString(rendered, "application/xml"); } getJSON(name) { var jsonString = this.nativeResourceLoader.loadBundleResource(name); var json = JSON.parse(jsonString); return json; } }
<infoList> <info> <header> <title>Presenter</title> </header> <text>Sam Davies</text> </info> <info> <header>
<title>Tags</title> </header> <text>Short</text> <text>Glasses</text> <text>Funny Accent</text> </info> </infoList> <stack> <title>Droning-On II: Return of the Tedium</title> </stack>
<infoList> <info> <header> <title>Presenter</title> </header> <text>{{presenter}}</text> </info> <info> <header> <title>Tags</title>
</header> {{#tags}} <text>{{.}}</text> {{/tags}} </info> </infoList> <stack> <title>{{title}}</title> </stack>
{ "presenter": "Sam Davies", "tags": [ "Short", "Glasses", "Funny Accent"
], "title": "Droning-On II: Return of the Tedium" }
demo
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
TVML is for media playback
Not just media playback 4 ~20 different templates 4 Complex
nested layouts 4 Great for browsing 4 Apple uses TVML a lot
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
Either TVML or native
Hybrid TVML & "Native" 1. Call native functionality from TVML
2. Integrate native views into TVML 3. Use TVML views in native apps
Call Native Functionality from TVML 4 Use JavaScriptCore 4 Create
native function, vend to JS context 4 Wire it in with JS app
demo
Integrate native views into TVML app 4 Extend TVML with
custom tags 4 Add custom style attributes to TVML 4 Use as regular TVML
demo
Five Myths about TVML 1. You have to use a
server 2. You write TVML in JavaScript strings 3. Layout includes data 4. TVML is for media playback 5. Either TVML or native
TVML Limitations
TVML Limitations 4 Less control over appearance / layout 4
Have to write JavaScript 4 Out of comfort zone 4 Documentation & samples {are|were} terrible
TVML Positives 4 Can redeploy app without app review 4
Trivial to use a server 4 Powerful layouts, really easily 4 XML is a good language for declarative layouts
try it. you might like it.
git.io/v6MsR github.com/sammyd @iwantmyrealname raywenderlich.com