My company, Discover Anywhere Mobile, has open sourced a software component that many iPhone developers may be interested in: Djolt (Django-like Templates) for Objective C. The objective of this project is to be able to take NSObjects – particularly NSDictionary, NSArray, NSString and NSNumber – and be able to feed them to a text template, Django style, and get text output. This will be fantastic for working with APIs that deliver data via JSON or XML.
It’s dependent on RegexKit library for now, though if the iPhone OS 4 NSRegularExpression is powerful enough we may transition to that.
The code is being tested against the Django template test cases, with the goal of having as complete as possible (given different language idioms) compatibility. We only cover a small subset of Django yet – the stuff we need – but if you’re interested in working on the project, please by all means join in.
Code
NSDictionary* d = [[NSData dataWithContentsOfFile:@"test.json"] yajl_JSON]; DjoltTemplate* t = [[DjoltTemplate alloc] initWithTemplateFile:@"test.djolt"]; NSString* r = [t render:d];
test.json
{
"title" : "Test 1",
"items" : [
{
"href" : "http://www.example.com/1",
"title" : "Example 1"
},
{
"href" : "http://www.example.com/2",
"title" : "Example 2 & Example \"2.5\""
},
{
"href" : "http://www.example.com/3",
"title" : "Example 3"
}
]
}
test.djolt
<html>
<head>{{ title }}</head>
<body>
{% if fred or items or bleck %}
<ul>
{% for itemd in items %}
<li><a href='{{ itemd.href }}'>{{ itemd.title|safe }}</a> ({{ forloop.counter }})</li>
{% endfor %}
</ul>
{% endif %}
<p>
{{ nothing|default:"something" }}
</p>
</body>
</html>
Output
<html> <head>Test 1</head> <body> <ul> <li><a href='http://www.example.com/1'>Example 1</a> (1)</li> <li><a href='http://www.example.com/2'>Example 2 & Example "2.5"</a> (2)</li> <li><a href='http://www.example.com/3'>Example 3</a> (3)</li> </ul> <p> something </p> </body> </html>
Here’s a lengthy Javascript code segment that can be dropped into any of your existing forms that provide for a date selection range. It has the following functionality: