AFNetwork 作用和用法詳解

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AFNetworking是一個輕量級的iOS網路通訊類庫。它建立在NSURLConnection和NSOperation等類庫的基礎上，讓很多網路通訊功能的實現變得十分簡單。它支援HTTP請求和基於REST的網路服務（包括GET、POST、 PUT、DELETE等）。支援ARC。Github地址：https://github.com/AFNetworking/AFNetworking

////  MJViewController.m//  03.AFN演練////  Created by apple on 14-4-30.//  Copyright (c) 2014年 itcast. All rights reserved.//#import "MJViewController.h"#import "AFNetworking.h"@interface MJViewController ()@end@implementation MJViewController/** 要使用常規的AFN網路訪問  1. AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];     所有的網路請求,均有manager發起  2. 需要注意的是,預設提交請求的資料是二進位的,返回格式是JSON     1> 如果提交資料是JSON的,需要將請求格式設定為AFJSONRequestSerializer    2> 如果返回格式不是JSON的,  3. 請求格式      AFHTTPRequestSerializer            二進位格式     AFJSONRequestSerializer            JSON     AFPropertyListRequestSerializer    PList(是一種特殊的XML,解析起來相對容易)  4. 返回格式      AFHTTPResponseSerializer           二進位格式     AFJSONResponseSerializer           JSON     AFXMLParserResponseSerializer      XML,只能返回XMLParser,還需要自己通過代理方法解析     AFXMLDocumentResponseSerializer (Mac OS X)     AFPropertyListResponseSerializer   PList     AFImageResponseSerializer          Image     AFCompoundResponseSerializer       組合 */- (void)viewDidLoad{    [super viewDidLoad];        [self reach];}#pragma mark - 演練#pragma mark - 檢測網路連接- (void)reach{    /**     AFNetworkReachabilityStatusUnknown          = -1,  // 未知     AFNetworkReachabilityStatusNotReachable     = 0,   // 無串連     AFNetworkReachabilityStatusReachableViaWWAN = 1,   // 3G 花錢     AFNetworkReachabilityStatusReachableViaWiFi = 2,   // 區域網路絡,不花錢     */    // 如果要檢測網路狀態的變化,必須用檢測管理器的單例的startMonitoring    [[AFNetworkReachabilityManager sharedManager] startMonitoring];        // 檢測網路連接的單例,網路變化時的回調方法    [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {        NSLog(@"%d", status);    }];}#pragma mark - Session 下載- (void)sessionDownload{    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];    AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:config];        NSString *urlString = @"http://localhost/itcast/videos/01.C語言-文法預覽.mp4";    urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];        NSURL *url = [NSURL URLWithString:urlString];    NSURLRequest *request = [NSURLRequest requestWithURL:url];        NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {        // 指定下載檔案儲存的路徑//        NSLog(@"%@ %@", targetPath, response.suggestedFilename);        // 將下載檔案儲存在緩衝路徑中        NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];        NSString *path = [cacheDir stringByAppendingPathComponent:response.suggestedFilename];                // URLWithString返回的是網路的URL,如果使用本地URL,需要注意        NSURL *fileURL1 = [NSURL URLWithString:path];        NSURL *fileURL = [NSURL fileURLWithPath:path];                NSLog(@"== %@ |||| %@", fileURL1, fileURL);                return fileURL;    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {        NSLog(@"%@ %@", filePath, error);    }];        [task resume];}#pragma mark - POST JSON- (void)postJSON{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];        NSDictionary *dict = @{@"name": @"zhangsan"};    NSDictionary *dict1 = @{@"name": @"wangwu"};    NSArray *array = @[dict, dict1];    // 佈建要求格式    manager.requestSerializer = [AFJSONRequestSerializer serializer];    // 設定返回格式    manager.responseSerializer = [AFHTTPResponseSerializer serializer];        [manager POST:@"http://localhost/postjson.php" parameters:array success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];                NSLog(@"%@", result);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {            }];    }#pragma mark - 隨機檔案名稱上傳- (void)postUpload1{    // 本地上傳給伺服器時,沒有確定的URL,不好用MD5的方式處理    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    manager.responseSerializer = [AFHTTPResponseSerializer serializer];        [manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {                NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"頭像1.png" withExtension:nil];                // 要上傳儲存在伺服器中的名稱        // 使用時間來作為檔案名稱 2014-04-30 14:20:57.png        // 讓不同的使用者資訊,儲存在不同目錄中        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        // 設定日期格式        formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";        NSString *fileName = [formatter stringFromDate:[NSDate date]];                [formData appendPartWithFileURL:fileURL name:@"uploadFile" fileName:fileName mimeType:@"image/png" error:NULL];            } success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"OK");    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"error");    }];}#pragma mark - POST上傳- (void)postUpload{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    // AFHTTPResponseSerializer就是正常的HTTP請求響應結果:NSData    // 當請求的返回資料不是JSON,XML,PList,UIImage之外,使用AFHTTPResponseSerializer    // 例如返回一個html,text...    //    // 實際上就是AFN沒有對響應資料做任何處理的情況    manager.responseSerializer = [AFHTTPResponseSerializer serializer];        // formData是遵守了AFMultipartFormData的對象    [manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {                // 將本地的檔案上傳至伺服器        NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"頭像1.png" withExtension:nil];                [formData appendPartWithFileURL:fileURL name:@"uploadFile" error:NULL];    } success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];                NSLog(@"完成 %@", result);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"錯誤 %@", error.localizedDescription);    }];}#pragma mark - JSON- (void)XMLData{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];        // 返回的資料格式是XML    manager.responseSerializer = [AFXMLParserResponseSerializer serializer];        NSDictionary *dict = @{@"format": @"xml"};        // 網路訪問是非同步,回調是主線程的,因此程式員不用管在主線程更新UI的事情    [manager GET:@"http://localhost/videos.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {                // 如果結果是XML,同樣需要使用6個代理方法解析,或者使用第三方庫        // 第三方庫第三方架構,效率低,記憶體流失        NSLog(@"%@", responseObject);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@", error);    }];}#pragma mark - JSON- (void)JSONData{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];        // 原本需要拼接get訪問URL ? & =    NSDictionary *dict = @{@"format": @"json"};        // 網路訪問是非同步,回調是主線程的,因此程式員不用管在主線程更新UI的事情    [manager GET:@"http://localhost/videos.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"%@", responseObject);        // 提問:NSURLConnection非同步方法呼叫回調,是在子線程        // 得到回調之後,通常更新UI,是在主線程        NSLog(@"%@", [NSThread currentThread]);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@", error);    }];}#pragma mark - POST登入- (void)postLogin{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];        // 原本需要拼接get訪問URL ? & =    NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};        // 網路訪問是非同步,回調是主線程的,因此程式員不用管在主線程更新UI的事情    [manager POST:@"http://localhost/login.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"%@", responseObject);        // 提問:NSURLConnection非同步方法呼叫回調,是在子線程        // 得到回調之後,通常更新UI,是在主線程        NSLog(@"%@", [NSThread currentThread]);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@", error);    }];}#pragma mark - GET登入- (void)getLogin{    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];        // 原本需要拼接get訪問URL ? & =    NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};        // 網路訪問是非同步,回調是主線程的,因此程式員不用管在主線程更新UI的事情    [manager GET:@"http://localhost/login.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"%@", responseObject);        // 提問:NSURLConnection非同步方法呼叫回調,是在子線程        // 得到回調之後,通常更新UI,是在主線程        NSLog(@"%@", [NSThread currentThread]);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@", error);    }];}@end