nsurlsession | 易学教程

URLSession moving slow when caching a firebase video url

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问题 I initially asked this question, got the answer, and in the comments @LeoDabus said: NSData(contentsOf: url) it is not mean to use with non local resources urls He suggested I use URLSession which I did, but the response is very slow. I'm wondering am I doing something wrong. The video is 2mb if that makes any difference. Inside the the session's completionHandler I tried updating the returned data on the main queue but there was a scrolling glitch while doing that. Using DispatchQueue.global

URLSession moving slow when caching a firebase video url

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URLSession moving slow when caching a firebase video url

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How to cancel a URL session request

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问题 I am upload multiple image to server using convert image to base64 and send image in a API as a parameter. But when we call api again and again then how to stop api calling on button click. I am using below code to call API. Thanks in advance let urlPath: String = "URL" let url: URL = URL(string: urlPath)! var request1 = URLRequest(url: url) request1.httpMethod = "POST" let stringPost="imgSrc=\(image)" let data = stringPost.data(using: String.Encoding.utf8) // print("data\(data)") request1

Download in documents directory or move file async - iOS

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问题 I am building an iOS app in which the user can download different files. I am using an URLSessionDownloadTask and an URLSession to download a file asynchronously. When the download is finished, the destination folder is by default, the tmp/ directory. So, when the download ends, I need to move the temporary file to another directory. For a picture or a song, this takes only 1 second maybe even less. But when the file is a video for example, it can take up to 15 seconds. The issue To allow the

How to wait for all tasks of an NSURLSession to complete?

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问题 Why is NSURLSession operation queue empty after creating and resuming an NSURLSessionTask? Is there a way to tell if an NSURLSession has tasks pending? The goal is to wait for multiple tasks to complete, but this doesn't work: NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithStreamedRequest:request]; [uploadTask resume]; // this prints "0" NSLog(self.session.delegateQueue.operationCount) // this returns immediately instead of waiting for task to complete [self.session

Best practice to replace a synchronous NSURLConnection with NSURLSession

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问题 As NSURLConnection sendSynchronousRequest:returningResponse:error:&connectionError is set deprecated I will have to replace an Importer I wrote a long time ago. The Importer does the following: It fetches data from API-A. The data there can be on multiple pages. It uses the data from the first fetch (also multipage) to query data from API-B and merges Results from the API-B query will be merged with data from API-A I implemented this with a background-operation where I use methods for each

The resource could not be loaded because the App Transport Security policy requires the use of a secure connection

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xmpp 项目中遇到的问题，用苹果的通信API 写一个PUT 方法，向服务器上传一张图片。遇到如题问题。 Plist 文件没有NSAppTransportSecurity属性 Dic，添加该属性，再添加二级属性NSAllowsArbitraryLoads BOOL YES 苹果文档：https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html stackOverflow:http://stackoverflow.com/questions/32631184/the-resource-could-not-be-loaded-because-the-app-transport-security-policy-requi 工具类：HTTPTool.h 1 #import <Foundation/Foundation.h> 2 3 typedef void (^HttpToolProgressBlock)(CGFloat progress); 4 typedef void (^HttpToolCompletionBlock)(NSError *error); 5 6 7 8 @interface HttpTool :

从网上DownLoad(断点下载)

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方法步骤一、storyboard布局 #import "ViewController.h" @interface ViewController ()<NSURLSessionDownloadDelegate> ///显示图片的 @property (weak, nonatomic) IBOutlet UIImageView *imageView; ///显示进度的 @property (weak, nonatomic) IBOutlet UIProgressView *progressView; ///下载任务的属性 @property (nonatomic,strong)NSURLSessionDownloadTask *task; ///网络请求类 @property (nonatomic,strong)NSURLSession *session; ///发送请求类 @property (nonatomic,strong)NSURLRequest *request; ///用于保存已经下载的数据的，供继续下载使用 @property(nonatomic,strong)NSMutableData *data; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do

开发只懂 AFN ？搞定 NSURLSession 才是硬道理

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由于傲娇的苹果在 iOS9 之后已经放弃了 NSURLConnection ，所以在现在的实际开发中，除了大家常见的 AFN 框架，一般使用的是 iOS7 之后推出的 NSURLSession，作为一名 iOS 开发人员，如果你只知道 AFN 框架来进行网络请求，那就只能说是 too young too simple,sometimes naive。目录本来想创建一个目录跳转的，好像简书不支持，只好作罢，有哪位大神知道怎么在简书支持目录跳转的，希望不吝赐教！ NSURLSession 的优势 NSURLSessionTask 的子类 NSURLSessionDataTask 发送 GET 请求 NSURLSessionDataTask 发送 POST 请求 NSURLSessionDataTask 设置代理发送请求设置代理之后的强引用问题 NSURLSessionDataTask 简单下载 NSURLSessionDownloadTask 简单下载 dataTask 和 downloadTask 下载对比写在最后 NSURLSession 的优势 NSURLSession 支持 http2.0 协议在处理下载任务的时候可以直接把数据下载到磁盘支持后台下载|上传同一个 session 发送多个请求，只需要建立一次连接（复用了TCP）提供了全局的 session