从服务器的目标C或斯威夫特下载文件 [英] Downloading Files from server Objective C or Swift
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问题描述
我如何从我的服务器到用户的手机下载音频文件的应用程序中使用?当我去的网站链接,JSON code出现这样的
[{名:让党,路径:HTTP:\\ / \\ / domain.us \\ / \\ / \\ /音频\\ / \\ /让Party.wav},
{名:让你知道,路径:HTTP:\\ / \\ / domain.us \\ / \\ / \\ /音频\\ / \\ /让你Know.wav},
{名:妈呀,路径:HTTP:\\ / \\ / domain.us \\ / \\ / \\ /音频\\ / \\ / OMG.wav}]
我试图得到JSON和它转化斯威夫特,但坠毁我的应用程序。但是,当我把博客JSON,它完美的作品,没有崩溃。我怎样才能做到这一点无论是在雨燕或Objective-C?
编辑:我现在得到一个错误信息
。当前code:
让urlPath =http://www.domain.us/ 让URL = NSURL(字符串:urlPath) 让会话= NSURLSession.sharedSession() 让任务= session.dataTaskWithURL(URL,completionHandler:{数据,回应,误差 - >无效的 如果错误!= {为零
的println(错误)
}其他{
让jsonResult = NSJSONSerialization.JSONObjectWithData(数据,选项:NSJSONReadingOptions.MutableContainers,错误:无)作为NSDictionary的
的println(jsonResult)
} }) task.resume()
}
错误消息:
2014年11月12日20:07:23.652 JSON实践[6073:284290] CFNetwork的SSLHandshake失败(-9847)
2014年11月12日20:07:23.874 JSON实践[6073:284290] CFNetwork的SSLHandshake失败(-9847)
2014年11月12日20:07:24.054 JSON实践[6073:284290] CFNetwork的SSLHandshake失败(-9847)
2014年11月12日20:07:24.055 JSON实践[6073:284290] NSURLConnection的/ CFURLConnection HTTP加载失败(kCFStreamErrorDomainSSL,-9847)
错误域= NSURLErrorDomain code = -1200的操作无法完成(NSURLErrorDomain错误-1200)。的UserInfo = {0x7fc0ba656020 = NSErrorFailingURLStringKey HTTPS://www.domain.us/,NSErrorFailingURLKey = HTTPS:/ /www.makemeip.us/,_kCFStreamErrorDomainKey = 3,_kCFStreamError codeKey = -9847,NSUnderlyingError = 0x7fc0ba52ebb0该操作无法完成。(kCFErrorDomainCFNetwork错误-1200。)}
解决方案
//
// ViewController.swift
//的Test2
//
//创建者ADM在14年11月14日。
//版权所有(C)2014年Dabus.Tv。版权所有。
//进口的UIKit
进口基金会
进口AVFoundation一流的ViewController:UIViewController的{
@IBOutlet弱VAR strFiles:UITextView的!
覆盖FUNC viewDidLoad中(){
super.viewDidLoad()
//装载视图,通常从笔尖后做任何额外的设置。 如果让URL = NSURL(字符串:http://www.anyurl.com/){
如果让loadedString =字符串(contentsOfURL:URL){
//文件的字符串是成功地加载
//添加文件路径+ / +文件名+扩展名
让localUrl =(NSSearchPathForDirectoriesInDomains(.DocumentDirectory,.UserDomainMask,真)[0]为String)+/+数据+.db的// URL文件为String(本地存储路径)
//检查本地文件路径URL
如果让checkLocalUrl = NSURL(fileURLWithPath:localUrl){
让savedFile = loadedString.writeToURL(checkLocalUrl,原子:真的,编码:NSUTF8StringEncoding,错误:无)//写给url savedFile会真的还是假的
如果savedFile {
//做什么
self.strFiles.text =\\(self.strFiles.text)路径:\\(checkLocalUrl)\\ n
self.strFiles.text =\\(self.strFiles.text)文件被成功地保存\\ n
} //让我们创建与您的字符串的ARRAY
变种arrayLines =
如果让myArrayParsed = loadedString.JSONParseArray(){
为ELEM:AnyObject在myArrayParsed {
让名= ELEM [名称]为String
让PATH = ELEM [路径]为String
arrayLines =姓名:\\(名称),路径:\\(路径) self.strFiles.text =\\(self.strFiles.text)\\(arrayLines)\\ n
}
}其他{
//无法解析数组 } }其他{
//不能检查本地网址
}
}其他{
//无法加载从URL字符串内容
}
}其他{
// 无效的网址
}
}
覆盖FUNC didReceiveMemoryWarning(){
super.didReceiveMemoryWarning()
可以重新创建任何资源的处置//。
}
}
扩展字符串{
FUNC JSONParseArray() - > [AnyObject] {
如果让数据= self.dataUsingEncoding(NSUTF8StringEncoding){
如果让阵列= NSJSONSerialization.JSONObjectWithData(数据,选项:NSJSONReadingOptions(0),错误:无)作为? [AnyObject] {
返回的数组
}
}其他{
零回报
}
返回[AnyObject]()
}
}
How can I download audio files from my server to the user's phone to be used in the app? When I go to the website link, JSON code comes up like this
[{"name":"Lets Party","path":"http:\/\/domain.us\/\/\/audios\/\/Lets Party.wav"},
{"name":"Let You Know","path":"http:\/\/domain.us\/\/\/audios\/\/Let You Know.wav"},
{"name":"OMG","path":"http:\/\/domain.us\/\/\/audios\/\/OMG.wav"}]
I tried getting the JSON and converting it in Swift, but that crashed my app. But when I put a blog JSON, it works perfectly, no crash. How can I do this in either Swift or Objective-C?
EDIT: I get an error message now.
Current code:
let urlPath = "http://www.domain.us/"
let url = NSURL(string: urlPath)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithURL(url, completionHandler: {data, response, error -> Void in
if error != nil {
println(error)
} else {
let jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
println(jsonResult)
}
})
task.resume()
}
Error Message:
2014-11-12 20:07:23.652 JSON Practice[6073:284290] CFNetwork SSLHandshake failed (-9847)
2014-11-12 20:07:23.874 JSON Practice[6073:284290] CFNetwork SSLHandshake failed (-9847)
2014-11-12 20:07:24.054 JSON Practice[6073:284290] CFNetwork SSLHandshake failed (-9847)
2014-11-12 20:07:24.055 JSON Practice[6073:284290] NSURLConnection/CFURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9847)
Error Domain=NSURLErrorDomain Code=-1200 "The operation couldn’t be completed. (NSURLErrorDomain error -1200.)" UserInfo=0x7fc0ba656020 {NSErrorFailingURLStringKey=https://www.domain.us/, NSErrorFailingURLKey=https://www.makemeip.us/, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9847, NSUnderlyingError=0x7fc0ba52ebb0 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error -1200.)"}
解决方案
//
// ViewController.swift
// Test2
//
// Created by adm on 11/14/14.
// Copyright (c) 2014 Dabus.Tv. All rights reserved.
//
import UIKit
import Foundation
import AVFoundation
class ViewController: UIViewController {
@IBOutlet weak var strFiles: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
if let url = NSURL(string: "http://www.anyurl.com/") {
if let loadedString = String(contentsOfURL: url) {
// file string was sucessfully loaded
// add the file path + / + filename + extension
let localUrl = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String) + "/" + "data" + ".db" // Documents URL as String (local storage path)
// check local file path url
if let checkLocalUrl = NSURL(fileURLWithPath: localUrl) {
let savedFile = loadedString.writeToURL(checkLocalUrl, atomically: true, encoding: NSUTF8StringEncoding, error: nil) // write to url savedFile will true or false
if savedFile {
// do whatever
self.strFiles.text = "\(self.strFiles.text)path: \(checkLocalUrl)\n"
self.strFiles.text = "\(self.strFiles.text)file was sucessfully saved\n"
}
// lets create an ARRAY with your string
var arrayLines = ""
if let myArrayParsed = loadedString.JSONParseArray() {
for elem:AnyObject in myArrayParsed {
let name = elem["name"] as String
let path = elem["path"] as String
arrayLines = "Name: \(name), Path: \(path)"
self.strFiles.text = "\(self.strFiles.text)\(arrayLines)\n"
}
} else {
// could not parse array
}
} else {
// could not check local url
}
} else {
// could not load string contents from url
}
} else {
// invalid url
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension String {
func JSONParseArray() -> [AnyObject]? {
if let data = self.dataUsingEncoding(NSUTF8StringEncoding) {
if let array = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions(0), error: nil) as? [AnyObject] {
return array
}
} else {
return nil
}
return [AnyObject]()
}
}
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