Swift Basic Knowledge Finishing

Define an array:

var a:[string]=["File", "Edit", "View", "Navigate"]

Define a dictionary:

var airports: [String:string] = ["YYZ": "Toronto Pearson", "DUB": "Dublin"]

Defines a nsmutabledictionary array

vara:[string]=["File","Edit","View","Navigate"]varD:nsmutabledictionary = ["Xcode":"name","6.1.1":"version","QQ"A

Convert a dictionary to JSON data:

var jsondata = Nsjsonserialization.datawithjsonobject (dictionary, Options:nil, Error:nil)

Convert JSON to Dictionary data:

 as Nsdictionary

JSON interacts with the server for data

1. Use Nodejs to create a simple Web service that spits out JSON data:

 
var http=require(‘http‘) var port = ‘8081‘ var data = {‘name‘: ‘jifeng‘, ‘company‘: ‘taobao‘};
http.createServer(function (req, res) {
    res.writeHead(200, {‘Content-Type‘: ‘text/html; charset=UTF-8‘,‘Server‘:‘NodeJs‘});
    res.end(JSON.stringify(data));
}).listen(port, "127.0.0.1");

2. Request data with Swift native class:

 
var url = NSURL(string: "http://localhost:8081") var request = NSURLRequest(URL: url!)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler:{
    (response, data, error) -> Void in if (error? != nil) { //Handle Error here  print(error)
    }else{
        let jsonData = NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers, error: nil) as NSDictionary
        println(jsonData) //Handle data in NSData type  }
    
})

Swift Basic Knowledge Finishing