在Swift中使用JavaScript的方法和技巧详细介绍

//JSON
[
 { "first": "Grace", "last": "Hopper", "year": 1906 },
 { "first": "Ada", "last": "Lovelace", "year": 1815 },
 { "first": "Margaret", "last": "Hamilton", "year": 1936 }
]

//JavaScript
var loadPeopleFromJSON = function(jsonString) {
 var data = JSON.parse(jsonString);
 var people = [];
 for (i = 0; i < data.length; i++) {
 var person = Person.createWithFirstNameLastName(data[i].first, data[i].last);
 person.birthYear = data[i].year;
 people.push(person);
 }
 return people;
}

//Objective-C
// get JSON string
NSString *peopleJSON = [NSString stringWithContentsOfFile:... encoding:NSUTF8StringEncoding error:nil];
// get load function
JSValue *load = context[@"loadPeopleFromJSON"];
// call with JSON and convert to an NSArray
JSValue *loadResult = [load callWithArguments:@[peopleJSON]];
NSArray *people = [loadResult toArray];
// get rendering function and create template
JSValue *mustacheRender = context[@"Mustache"][@"render"];
NSString *template = @"{{getFullName}}, born {{birthYear}}";
// loop through people and render Person object as string
for (Person *person in people) {
 NSLog(@"%@", [mustacheRender callWithArguments:@[template, person]]);
}
// Output:
// Grace Hopper, born 1906
// Ada Lovelace, born 1815
// Margaret Hamilton, born 1936

//Swift
// get JSON string
if let peopleJSON = NSString(contentsOfFile:..., encoding: NSUTF8StringEncoding, error: nil) {
 // get load function
 let load = context.objectForKeyedSubscript("loadPeopleFromJSON")
 // call with JSON and convert to an array of `Person`
 if let people = load.callWithArguments([peopleJSON]).toArray() as? [Person] {

 // get rendering function and create template
 let mustacheRender = context.objectForKeyedSubscript("Mustache").objectForKeyedSubscript("render")
 let template = "{{getFullName}}, born {{birthYear}}"

 // loop through people and render Person object as string
 for person in people {
 println(mustacheRender.callWithArguments([template, person]))
 }
 }
}
// Output:
// Grace Hopper, born 1906
// Ada Lovelace, born 1815
// Margaret Hamilton, born 1936