AFNetworking是一个讨人喜欢的网络库,适用于iOS以及Mac OS X. 它构建于在NSURLConnection, NSOperation, 以及其他熟悉的Foundation技术之上. 它拥有良好的架构,丰富的api,以及模块化构建方式,使得使用起来非常轻松.例如,他可以使用很轻松的方式从一个url来得到json数据:
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NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/public_timeline.json"]; |
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NSURLRequest *request = [NSURLRequest requestWithURL:url]; |
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AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
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NSLog(@"Public Timeline: %@", JSON); |
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} failure:nil]; |
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[operation start]; |
如何开始使用
- 下载 AFNetworking 然后尝试使用里面的例子
- 阅读 “Getting Started” guide, FAQ, 或者 other articles in the wiki
- 查看 完整的文档
- 查看 NSScreencast episode about AFNetworking 来得到一个快速的参考,以快速的应用到你的app中
- 有问题? Stack Overflow 是最好的地方来找到答案
综述
CORE:
AFURLConnectionOperation:一个 NSOperation 实现了NSURLConnection 的代理方法.
HTTP Requests:
AFHTTPRequestOperation:AFURLConnectionOperation的子类,当request使用的协议为HTTP和HTTPS时,它压缩了用于决定request是否成功的状态码和内容类型.
AFJSONRequestOperation:AFHTTPRequestOperation的一个子类,用于下载和处理jason response数据.
AFXMLRequestOperation:AFHTTPRequestOperation的一个子类,用于下载和处理xml response数据.
AFPropertyListRequestOperation:AFHTTPRequestOperation的一个子类,用于下载和处理property list response数据.
HTTP CLIENT:
AFHTTPClient:捕获一个基于http协议的网络应用程序的公共交流模式.包含:
- 使用基本的url相关路径来只做request
- 为request自动添加设置http headers.
- 使用http 基础证书或者OAuth来验证request
- 为由client制作的requests管理一个NSOperationQueue
- 从NSDictionary生成一个查询字符串或http bodies.
- 从request中构建多部件
- 自动的解析http response数据为相应的表现数据
- 在网络可达性测试用监控和响应变化.
IMAGES
AFImageRequestOperation:一个AFHTTPRequestOperation的子类,用于下载和处理图片.
UIImageView+AFNetworking:添加一些方法到UIImageView中,为了从一个URL中异步加载远程图片
例子程序
XML REQUEST
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NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.flickr.com/services/rest/?method=flickr.groups.browse&api_key=b6300e17ad3c506e706cb0072175d047&cat_id=34427469792%40N01&format=rest"]]; |
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AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
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XMLParser.delegate = self; |
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[XMLParser parse]; |
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} failure:nil]; |
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[operation start]; |
IMAGE REQUEST
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UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)]; |
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[imageView setImageWithURL:[NSURL URLWithString:@"http://i.imgur.com/r4uwx.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]]; |
API CLIENT REQUEST
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// AFGowallaAPIClient is a subclass of AFHTTPClient, which defines the base URL and default HTTP headers for NSURLRequests it creates |
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[[AFGowallaAPIClient sharedClient] getPath:@"/spots/9223" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
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NSLog(@"Name: %@", [responseObject valueForKeyPath:@"name"]); |
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NSLog(@"Address: %@", [responseObject valueForKeyPath:@"address.street_address"]); |
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} failure:nil]; |
FILE UPLOAD WITH PROGRESS CALLBACK
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NSURL *url = [NSURL URLWithString:@"http://api-base-url.com"]; |
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AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url]; |
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NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"avatar.jpg"], 0.5); |
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NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
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[formData appendPartWithFileData:imageData name:@"avatar" fileName:@"avatar.jpg" mimeType:@"image/jpeg"]; |
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}]; |
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AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:request] autorelease]; |
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[operation setUploadProgressBlock:^(NSInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
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NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite); |
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}]; |
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[operation start]; |
STREAMING REQUEST
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NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost:8080/encode"]]; |
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|
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AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:request] autorelease]; |
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operation.inputStream = [NSInputStream inputStreamWithFileAtPath:[[NSBundle mainBundle] pathForResource:@"large-image" ofType:@"tiff"]]; |
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operation.outputStream = [NSOutputStream outputStreamToMemory]; |
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[operation start]; |