iOS 仿新浪微博图片查看功能

<p align="center" > <img src="https://raw.github.com/AFNetworking/AFNetworking/assets/afnetworking-logo.png" alt="AFNetworking" title="AFNetworking"> </p> [](https://travis-ci.org/AFNetworking/AFNetworking) [](https://codecov.io/github/AFNetworking/AFNetworking?branch=master) [](https://img.shields.io/cocoapods/v/AFNetworking.svg) [](https://github.com/Carthage/Carthage) [](http://cocoadocs.org/docsets/AFNetworking) [](http://twitter.com/AFNetworking) AFNetworking is a delightful networking library for iOS, macOS, watchOS, and tvOS. It's built on top of the [Foundation URL Loading System](http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/URLLoadingSystem/URLLoadingSystem.html), extending the powerful high-level networking abstractions built into Cocoa. It has a modular architecture with well-designed, feature-rich APIs that are a joy to use. Perhaps the most important feature of all, however, is the amazing community of developers who use and contribute to AFNetworking every day. AFNetworking powers some of the most popular and critically-acclaimed apps on the iPhone, iPad, and Mac. Choose AFNetworking for your next project, or migrate over your existing projects—you'll be happy you did! ## How To Get Started - [Download AFNetworking](https://github.com/AFNetworking/AFNetworking/archive/master.zip) and try out the included Mac and iPhone example apps - Read the ["Getting Started" guide](https://github.com/AFNetworking/AFNetworking/wiki/Getting-Started-with-AFNetworking), [FAQ](https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ), or [other articles on the Wiki](https://github.com/AFNetworking/AFNetworking/wiki) - Check out the [documentation](http://cocoadocs.org/docsets/AFNetworking/) for a comprehensive look at all of the APIs available in AFNetworking - Read the [AFNetworking 3.0 Migration Guide](https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-3.0-Migration-Guide) for an overview of the architectural changes from 2.0. ## Communication - If you **need help**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/afnetworking). (Tag 'afnetworking') - If you'd like to **ask a general question**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/afnetworking). - If you **found a bug**, _and can provide steps to reliably reproduce it_, open an issue. - If you **have a feature request**, open an issue. - If you **want to contribute**, submit a pull request. ## Installation AFNetworking supports multiple methods for installing the library in a project. ## Installation with CocoaPods [CocoaPods](http://cocoapods.org) is a dependency manager for Objective-C, which automates and simplifies the process of using 3rd-party libraries like AFNetworking in your projects. See the ["Getting Started" guide for more information](https://github.com/AFNetworking/AFNetworking/wiki/Getting-Started-with-AFNetworking). You can install it with the following command: ```bash $ gem install cocoapods ``` > CocoaPods 0.39.0+ is required to build AFNetworking 3.0.0+. #### Podfile To integrate AFNetworking into your Xcode project using CocoaPods, specify it in your `Podfile`: ```ruby source 'https://github.com/CocoaPods/Specs.git' platform :ios, '8.0' target 'TargetName' do pod 'AFNetworking', '~> 3.0' end ``` Then, run the following command: ```bash $ pod install ``` ### Installation with Carthage [Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. You can install Carthage with [Homebrew](http://brew.sh/) using the following command: ```bash $ brew update $ brew install carthage ``` To integrate AFNetworking into your Xcode project using Carthage, specify it in your `Cartfile`: ```ogdl github "AFNetworking/AFNetworking" ~> 3.0 ``` Run `carthage` to build the framework and drag the built `AFNetworking.framework` into your Xcode project. ## Requirements | AFNetworking Version | Minimum iOS Target | Minimum macOS Target | Minimum watchOS Target | Minimum tvOS Target | Notes | |:--------------------:|:---------------------------:|:----------------------------:|:----------------------------:|:----------------------------:|:-------------------------------------------------------------------------:| | 3.x | iOS 7 | OS X 10.9 | watchOS 2.0 | tvOS 9.0 | Xcode 7+ is required. `NSURLConnectionOperation` support has been removed. | | 2.6 -> 2.6.3 | iOS 7 | OS X 10.9 | watchOS 2.0 | n/a | Xcode 7+ is required. | | 2.0 -> 2.5.4 | iOS 6 | OS X 10.8 | n/a | n/a | Xcode 5+ is required. `NSURLSession` subspec requires iOS 7 or OS X 10.9. | | 1.x | iOS 5 | Mac OS X 10.7 | n/a | n/a | | 0.10.x | iOS 4 | Mac OS X 10.6 | n/a | n/a | (macOS projects must support [64-bit with modern Cocoa runtime](https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtVersionsPlatforms.html)). > Programming in Swift? Try [Alamofire](https://github.com/Alamofire/Alamofire) for a more conventional set of APIs. ## Architecture ### NSURLSession - `AFURLSessionManager` - `AFHTTPSessionManager` ### Serialization * `<AFURLRequestSerialization>` - `AFHTTPRequestSerializer` - `AFJSONRequestSerializer` - `AFPropertyListRequestSerializer` * `<AFURLResponseSerialization>` - `AFHTTPResponseSerializer` - `AFJSONResponseSerializer` - `AFXMLParserResponseSerializer` - `AFXMLDocumentResponseSerializer` _(macOS)_ - `AFPropertyListResponseSerializer` - `AFImageResponseSerializer` - `AFCompoundResponseSerializer` ### Additional Functionality - `AFSecurityPolicy` - `AFNetworkReachabilityManager` ## Usage ### AFURLSessionManager `AFURLSessionManager` creates and manages an `NSURLSession` object based on a specified `NSURLSessionConfiguration` object, which conforms to `<NSURLSessionTaskDelegate>`, `<NSURLSessionDataDelegate>`, `<NSURLSessionDownloadDelegate>`, and `<NSURLSessionDelegate>`. #### Creating a Download Task ```objective-c NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"]; NSURLRequest *request = [NSURLRequest requestWithURL:URL]; NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) { NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil]; return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]]; } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) { NSLog(@"File downloaded to: %@", filePath); }]; [downloadTask resume]; ``` #### Creating an Upload Task ```objective-c NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"]; NSURLRequest *request = [NSURLRequest requestWithURL:URL]; NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"]; NSURLSessionUploadTask