Swift - 使用NSURL进行数据的提交和获取（POST与GET）
作者：hangge | 2015-03-24 14:39
使用Swift进行iOS开发时，不可避免的要进行远程的数据获取和提交。
其数据请求的方式既可能是POST也可能是GET。同不管是POST还是GET又可以分为同步请求和异步请求。
下面通过四个例子来进行演示。
（2）异步请求
（2）异步请求
1，使用POST方式提交数据（用户id和分数）
（1）同步请求
//保存分数
func saveScore(score:Int, userid:String)
{
let urlString:String = "http://www.hangge.com/"
var url:NSURL!
url = NSURL(string:urlString)
let request = NSMutableURLRequest(URL:url)
let body = "score=\(score)&user=\(userid)"
//编码POST数据
let postData = body.dataUsingEncoding(NSUTF8StringEncoding)
//保用 POST 提交
request.HTTPMethod = "POST"
request.HTTPBody = postData
//响应对象
var response:NSURLResponse?
do{
//发出请求
let received:NSData? = try NSURLConnection.sendSynchronousRequest(request,
returningResponse: &response)
let datastring = NSString(data:received!, encoding: NSUTF8StringEncoding)
print(datastring)
}catch let error as NSError{
//打印错误消息
print(error.code)
print(error.description)
}
}
（2）异步请求
import UIKit
class ScoreController:NSObject, NSURLConnectionDataDelegate
{
//保存分数
func saveScore(score:Int, userid:String)
{
let urlString:String = "http://www.hangge.com/savescore.php"
var url:NSURL!
url = NSURL(string:urlString)
let request = NSMutableURLRequest(URL:url)
let body = "score=\(score)&user=\(userid)"
//编码POST数据
let postData = body.dataUsingEncoding(NSASCIIStringEncoding)
//保用 POST 提交
request.HTTPMethod = "POST"
request.HTTPBody = postData
var conn:NSURLConnection!
conn = NSURLConnection(request: request,delegate: self)
conn.start()
print(conn)
}
func connection(connection: NSURLConnection, didReceiveResponse response: NSURLResponse)
{
print("请求成功！");
print(response)
}
func connection(connection: NSURLConnection, didReceiveData data: NSData)
{
print("请求成功1！");
let datastring = NSString(data:data, encoding: NSUTF8StringEncoding)
print(datastring)
}
func connectionDidFinishLoading(connection: NSURLConnection)
{
print("请求成功2！");
}
}
2，使用GET方式获取数据（用户id对应的分数）
（1）同步请求
//获取分数
func getScore(user:String){
let urlString:String="http://www.hangge.com/getscore.php?user=\(user)"
var url:NSURL!
url = NSURL(string:urlString)
let request = NSMutableURLRequest(URL:url)
request.HTTPMethod = "GET"
//响应对象
var response:NSURLResponse?
do{
//发出请求
let received:NSData? = try NSURLConnection.sendSynchronousRequest(request,
returningResponse: &response)
let datastring = NSString(data:received!, encoding: NSUTF8StringEncoding)
print(datastring)
}catch let error as NSError{
//打印错误消息
print(error.code)
print(error.description)
}
}
（2）异步请求
import UIKit
class ScoreController:NSObject, NSURLConnectionDataDelegate
{
//获取分数
func getScore(user:String)
{
let urlString:String="http://hangge.com/getscore.php?user=\(user)"
var url:NSURL!
url = NSURL(string:urlString)
let request = NSMutableURLRequest(URL:url)
request.HTTPMethod = "GET"
var conn:NSURLConnection!
conn = NSURLConnection(request: request,delegate: self)
conn.start()
print(conn)
}
func connection(connection: NSURLConnection, didReceiveResponse response: NSURLResponse)
{
print("请求成功！");
print(response)
}
func connection(connection: NSURLConnection, didReceiveData data: NSData)
{
print("请求成功1！");
let datastring = NSString(data:data, encoding: NSUTF8StringEncoding)
print(datastring)
//解析 JSON 数据
do {
let json : AnyObject! = try NSJSONSerialization.JSONObjectWithData(data,
options:NSJSONReadingOptions.AllowFragments)
let score = json.objectForKey("score") as! Int
print(score)
}catch let error as NSError{
//打印错误消息
print(error.code)
print(error.description)
}
}
func connectionDidFinishLoading(connection: NSURLConnection)
{
print("请求成功2！");
}
}
全部评论（2）
请问航哥怎么将手机app中的数据传给某个特定的服务器，或者如何获得服务器中特定的资源？有没有什么实例？
站长回复：可以参考我原来写的这篇文章：Swift - 使用NSURLSession加载数据、下载、上传文件（http://www.hangge.com/blog/cache/detail_780.html）
麻烦航哥更新一下这个吧NSURLConnection 谢谢了十分感谢
站长回复：代码已更新。不过自iOS9起建议改用NSURLSession。具体用法可以在站内搜索：NSURLSession