Objective-C builtin template system?
I am developing an iPhone application and I use HTML to display formatted text.
I often display the same webpage, but with a different content. I would like to 开发者_运维知识库use a template HTML file, and then fill it with my different values.
I wonder if Objective-C has a template system similar to ERB in Ruby.
That would allow to do things like
Template:
<HTML>
<HEAD>
</HEAD>
<BODY>
<H1>{{{title}}}</H1>
<P>{{{content}}}</P>
</BODY>
</HTML>
Objective-C (or what it may be in an ideal world)
Template* template = [[Template alloc] initWithFile:@"my_template.tpl"];
[template fillMarker:@"title" withContent:@"My Title"];
[template fillMarker:@"content" withContent:@"My text here"];
[template process];
NSString* result = [template result];
[template release];
And the result string would contain:
<HTML>
<HEAD>
</HEAD>
<BODY>
<H1>My Title</H1>
<P>My text here</P>
</BODY>
</HTML>
The above example could be achieved with some text replacement, but that would be a pain to maintain. I would also need something like loops inside templates. For instance, if I have multiple items to display, I would like to generate multiple divs.
Thanks for reading :)
Have you considered using as template:
<HTML>
<HEAD>
</HEAD>
<BODY>
<H1>%@</H1>
<P>%@</P>
</BODY>
</HTML>
And then:
// just to get file name right
NSString* fn =
[NSString stringWithFormat:@"%@/my_template.tpl",
[[ NSBundle mainBundle ] resourcePath ]];
// template
NSError *error;
NSString* template =
[NSString stringWithContentsOfFile:fn
encoding:NSUTF8StringEncoding error:&error];
// result
NSString* result =
[NSString stringWithFormat:template,
@"MyTitle",
@"MyText"];
I think it's pretty much what you want.
Of course you'll have to add your template files as resources in the project.
https://github.com/groue/GRMustache may help you.
No, Objective-C has no built-in template system. Generally for simple uses you'd just use textual replacement (possibly via stringWithFormat:) and for something more advanced you'd choose a full-fledged template system that suits your needs.
This works for me: http://mattgemmell.com/2008/05/20/mgtemplateengine-templates-with-cocoa/
Here is a lightweight template engine for objective-c : CCTemplate
In Swift 3.1
var fn: String = "\(Bundle.main.resourcePath)/my_template.tpl"
// template
var error: Error?
var template = try? String(contentsOfFile: fn, encoding: String.Encoding.utf8)
// result
var result = String(format: template, "MyTitle", "MyText")
For many of you likely to be unlikely option, but I needed templates to generate code and chose to use java + ftp, http://freemarker.org/libraries.html
I ended up with a tool to generate tableviews, form views, collection views, google drive integration based on the data model xcdatamodeld file.
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