AFNetworking瞭解

 

AFNetworking瞭解

 

AFNetworking是一個討人喜歡的網絡庫,適用於iOS以及Mac OS X. 它構建於在NSURLConnection, NSOperation, 以及其餘熟悉的Foundation技術之上. 它擁有良好的架構,豐富的api,以及模塊化構建方式,使得使用起來很是輕鬆.例如,他可使用很輕鬆的方式從一個url來獲得json數據:

 

1	NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/public_timeline.json"];
2	NSURLRequest *request = [NSURLRequest requestWithURL:url];
3	AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
4	NSLog(@"Public Timeline: %@", JSON);
5	} failure:nil];
6	[operation start];

 

如何開始使用

• 下載 AFNetworking 而後嘗試使用裏面的例子
• 閱讀 「Getting Started」 guide, FAQ, 或者 other articles in the wiki
• 查看 完整的文檔
• 查看 NSScreencast episode about AFNetworking 來獲得一個快速的參考,以快速的應用到你的app中
• 有問題? Stack Overflow 是最好的地方來找到答案

綜述

CORE:

AFURLConnectionOperation:一個 NSOperation 實現了NSURLConnection 的代理方法.

HTTP Requests:

AFHTTPRequestOperation:AFURLConnectionOperation的子類,當request使用的協議爲HTTP和HTTPS時,它壓縮了用於決定request是否成功的狀態碼和內容類型.

AFJSONRequestOperation:AFHTTPRequestOperation的一個子類,用於下載和處理jason response數據.

AFXMLRequestOperation:AFHTTPRequestOperation的一個子類,用於下載和處理xml response數據.

AFPropertyListRequestOperation:AFHTTPRequestOperation的一個子類,用於下載和處理property list response數據.

HTTP CLIENT:

AFHTTPClient:捕獲一個基於http協議的網絡應用程序的公共交流模式.包含:

• 使用基本的url相關路徑來只作request
• 爲request自動添加設置http headers.
• 使用http 基礎證書或者OAuth來驗證request
• 爲由client製做的requests管理一個NSOperationQueue
• 從NSDictionary生成一個查詢字符串或http bodies.
• 從request中構建多部件
• 自動的解析http response數據爲相應的表現數據
• 在網絡可達性測試用監控和響應變化.

IMAGES

AFImageRequestOperation:一個AFHTTPRequestOperation的子類,用於下載和處理圖片.

UIImageView+AFNetworking:添加一些方法到UIImageView中,爲了從一個URL中異步加載遠程圖片

例子程序

XML REQUEST

 

1	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"]];
2	AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
3	XMLParser.delegate = self;
4	[XMLParser parse];
5	} failure:nil];
6	[operation start];

 

IMAGE REQUEST

 

1	UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)];
2	[imageView setImageWithURL:[NSURL URLWithString:@"http://i.imgur.com/r4uwx.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]];

 

API CLIENT REQUEST

 

1	// AFGowallaAPIClient is a subclass of AFHTTPClient, which defines the base URL and default HTTP headers for NSURLRequests it creates
2	[[AFGowallaAPIClient sharedClient] getPath:@"/spots/9223" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
3	NSLog(@"Name: %@", [responseObject valueForKeyPath:@"name"]);
4	NSLog(@"Address: %@", [responseObject valueForKeyPath:@"address.street_address"]);
5	} failure:nil];

 

FILE UPLOAD WITH PROGRESS CALLBACK

 

01	NSURL *url = [NSURL URLWithString:@"http://api-base-url.com"];
02	AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
03	NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"avatar.jpg"], 0.5);
04	NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
05	[formData appendPartWithFileData:imageData name:@"avatar" fileName:@"avatar.jpg" mimeType:@"image/jpeg"];
06	}];
07
08	AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:request] autorelease];
09	[operation setUploadProgressBlock:^(NSInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
10	NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
11	}];
12	[operation start];

 

STREAMING REQUEST

 

1	NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost:8080/encode"]];
2
3	AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:request] autorelease];
4	operation.inputStream = [NSInputStream inputStreamWithFileAtPath:[[NSBundle mainBundle] pathForResource:@"large-image" ofType:@"tiff"]];
5	operation.outputStream = [NSOutputStream outputStreamToMemory];
6	[operation start];

 

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