AFNetwork 做用和用法詳解

轉自：http://blog.csdn.net/codywangziham01/article/details/38088017

AFNetworking是一個輕量級的iOS網絡通訊類庫。它創建在NSURLConnection和NSOperation等類庫的基礎上，讓不少網絡通訊功能的實現變得十分簡單。它支持HTTP請求和基於REST的網絡服務（包括GET、POST、 PUT、DELETE等）。支持ARC。

//
//  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網絡訪問
 
 1. AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
 
    全部的網絡請求,均有manager發起
 
 2. 須要注意的是,默認提交請求的數據是二進制的,返回格式是JSON
 
    1> 若是提交數據是JSON的,須要將請求格式設置爲AFJSONRequestSerializer
    2> 若是返回格式不是JSON的,
 
 3. 請求格式
 
     AFHTTPRequestSerializer            二進制格式
     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           二進制格式
     AFJSONResponseSerializer           JSON
     AFXMLParserResponseSerializer      XML,只能返回XMLParser,還須要本身經過代理方法解析
     AFXMLDocumentResponseSerializer (Mac OS X)
     AFPropertyListResponseSerializer   PList
     AFImageResponseSerializer          Image
     AFCompoundResponseSerializer       組合
 */

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self reach];
}

#pragma mark - 演練
#pragma mark - 檢測網絡鏈接
- (void)reach
{
    /**
     AFNetworkReachabilityStatusUnknown          = -1,  // 未知
     AFNetworkReachabilityStatusNotReachable     = 0,   // 無鏈接
     AFNetworkReachabilityStatusReachableViaWWAN = 1,   // 3G 花錢
     AFNetworkReachabilityStatusReachableViaWiFi = 2,   // 局域網絡,不花錢
     */
    // 若是要檢測網絡狀態的變化,必須用檢測管理器的單例的startMonitoring
    [[AFNetworkReachabilityManager sharedManager] startMonitoring];
    
    // 檢測網絡鏈接的單例,網絡變化時的回調方法
    [[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-語法預覽.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) {
        // 指定下載文件保存的路徑
//        NSLog(@"%@ %@", targetPath, response.suggestedFilename);
        // 將下載文件保存在緩存路徑中
        NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
        NSString *path = [cacheDir stringByAppendingPathComponent:response.suggestedFilename];
        
        // URLWithString返回的是網絡的URL,若是使用本地URL,須要注意
        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];
    // 設置請求格式
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    // 設置返回格式
    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 - 隨機文件名上傳
- (void)postUpload1
{
    // 本地上傳給服務器時,沒有肯定的URL,很差用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];
        
        // 要上傳保存在服務器中的名稱
        // 使用時間來做爲文件名 2014-04-30 14:20:57.png
        // 讓不一樣的用戶信息,保存在不一樣目錄中
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        // 設置日期格式
        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
    // 當請求的返回數據不是JSON,XML,PList,UIImage以外,使用AFHTTPResponseSerializer
    // 例如返回一個html,text...
    //
    // 實際上就是AFN沒有對響應數據作任何處理的狀況
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    
    // formData是遵照了AFMultipartFormData的對象
    [manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
        // 將本地的文件上傳至服務器
        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];
    
    // 返回的數據格式是XML
    manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
    
    NSDictionary *dict = @{@"format": @"xml"};
    
    // 網絡訪問是異步的,回調是主線程的,所以程序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) {
        
        // 若是結果是XML,一樣須要使用6個代理方法解析,或者使用第三方庫
        // 第三方庫第三方框架,效率低,內存泄漏
        NSLog(@"%@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", error);
    }];
}

#pragma mark - JSON
- (void)JSONData
{
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    // 本來須要拼接get訪問URL ? & =
    NSDictionary *dict = @{@"format": @"json"};
    
    // 網絡訪問是異步的,回調是主線程的,所以程序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異步方法回調,是在子線程
        // 獲得回調以後,一般更新UI,是在主線程
        NSLog(@"%@", [NSThread currentThread]);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", error);
    }];
}

#pragma mark - POST登陸
- (void)postLogin
{
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    // 本來須要拼接get訪問URL ? & =
    NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};
    
    // 網絡訪問是異步的,回調是主線程的,所以程序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異步方法回調,是在子線程
        // 獲得回調以後,一般更新UI,是在主線程
        NSLog(@"%@", [NSThread currentThread]);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", error);
    }];
}

#pragma mark - GET登陸
- (void)getLogin
{
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    // 本來須要拼接get訪問URL ? & =
    NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};
    
    // 網絡訪問是異步的,回調是主線程的,所以程序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異步方法回調,是在子線程
        // 獲得回調以後,一般更新UI,是在主線程
        NSLog(@"%@", [NSThread currentThread]);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", error);
    }];
}

@end