AFNetwork 作用和用法详解

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

AFNetworking是一个轻量级的iOS网络通信类库。它建立在NSURLConnection和NSOperation等类库的基础上，让很多网络通信功能的实现变得十分简单。它支持HTTP请求和基于REST的网络服务（包括GET、POST、
PUT、DELETE等）。支持ARC。

Github地址：https://github.com/AFNetworking/AFNetworking

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//

// MJViewController.m

// 03.AFN演练

//

// 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

/**

要使用常规的AFN网络访问

1. AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

所有的网络请求,均有manager发起

2. 需要注意的是,默认提交请求的数据是二进制的,返回格式是JSON

1> 如果提交数据是JSON的,需要将请求格式设置为AFJSONRequestSerializer

2> 如果返回格式不是JSON的,

3. 请求格式

AFHTTPRequestSerializer 二进制格式

AFJSONRequestSerializer JSON

AFPropertyListRequestSerializer PList(是一种特殊的XML,解析起来相对容易)

4. 返回格式

AFHTTPResponseSerializer 二进制格式

AFJSONResponseSerializer JSON

AFXMLParserResponseSerializer XML,只能返回XMLParser,还需要自己通过代理方法解析

AFXMLDocumentResponseSerializer (Mac OS X)

AFPropertyListResponseSerializer PList

AFImageResponseSerializer Image

AFCompoundResponseSerializer 组合

*/

- (void)viewDidLoad

{

[super viewDidLoad];

[self reach];

}

#pragma mark - 演练

#pragma mark - 检测网络连接

- (void)reach

{

/**

AFNetworkReachabilityStatusUnknown = -1, // 未知

AFNetworkReachabilityStatusNotReachable = 0, // 无连接

AFNetworkReachabilityStatusReachableViaWWAN = 1, // 3G 花钱

AFNetworkReachabilityStatusReachableViaWiFi = 2, // 局域网络,不花钱

*/

// 如果要检测网络状态的变化,必须用检测管理器的单例的startMonitoring

[[AFNetworkReachabilityManager sharedManager] startMonitoring];

// 检测网络连接的单例,网络变化时的回调方法

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

NSLog(@"%d", status);

}];

}

#pragma mark - Session 下载

- (void)sessionDownload

{

NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:config];

NSString *urlString = @"http://localhost/itcast/videos/01.C语言-语法预览.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) {

// 指定下载文件保存的路径

// NSLog(@"%@ %@", targetPath, response.suggestedFilename);

// 将下载文件保存在缓存路径中

NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];

NSString *path = [cacheDir stringByAppendingPathComponent:response.suggestedFilename];

// URLWithString返回的是网络的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];

// 设置请求格式

manager.requestSerializer = [AFJSONRequestSerializer serializer];

// 设置返回格式

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 - 随机文件名上传

- (void)postUpload1

{

// 本地上传给服务器时,没有确定的URL,不好用MD5的方式处理

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:@"头像1.png" withExtension:nil];

// 要上传保存在服务器中的名称

// 使用时间来作为文件名 2014-04-30 14:20:57.png

// 让不同的用户信息,保存在不同目录中

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

// 设置日期格式

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上传

- (void)postUpload

{

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

// AFHTTPResponseSerializer就是正常的HTTP请求响应结果:NSData

// 当请求的返回数据不是JSON,XML,PList,UIImage之外,使用AFHTTPResponseSerializer

// 例如返回一个html,text...

//

// 实际上就是AFN没有对响应数据做任何处理的情况

manager.responseSerializer = [AFHTTPResponseSerializer serializer];

// formData是遵守了AFMultipartFormData的对象

[manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

// 将本地的文件上传至服务器

NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"头像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(@"错误 %@", error.localizedDescription);

}];

}

#pragma mark - JSON

- (void)XMLData

{

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

// 返回的数据格式是XML

manager.responseSerializer = [AFXMLParserResponseSerializer serializer];

NSDictionary *dict = @{@"format": @"xml"};

// 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情

[manager GET:@"http://localhost/videos.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {

// 如果结果是XML,同样需要使用6个代理方法解析,或者使用第三方库

// 第三方库第三方框架,效率低,内存泄漏

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访问URL ? & =

NSDictionary *dict = @{@"format": @"json"};

// 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情

[manager GET:@"http://localhost/videos.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {

NSLog(@"%@", responseObject);

// 提问:NSURLConnection异步方法回调,是在子线程

// 得到回调之后,通常更新UI,是在主线程

NSLog(@"%@", [NSThread currentThread]);

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

NSLog(@"%@", error);

}];

}

#pragma mark - POST登录

- (void)postLogin

{

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

// 原本需要拼接get访问URL ? & =

NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};

// 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情

[manager POST:@"http://localhost/login.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {

NSLog(@"%@", responseObject);

// 提问:NSURLConnection异步方法回调,是在子线程

// 得到回调之后,通常更新UI,是在主线程

NSLog(@"%@", [NSThread currentThread]);

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

NSLog(@"%@", error);

}];

}

#pragma mark - GET登录

- (void)getLogin

{

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

// 原本需要拼接get访问URL ? & =

NSDictionary *dict = @{@"username": @"wangwu", @"password" : @"wang"};

// 网络访问是异步的,回调是主线程的,因此程序员不用管在主线程更新UI的事情

[manager GET:@"http://localhost/login.php" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {

NSLog(@"%@", responseObject);

// 提问:NSURLConnection异步方法回调,是在子线程

// 得到回调之后,通常更新UI,是在主线程

NSLog(@"%@", [NSThread currentThread]);

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

NSLog(@"%@", error);

}];

}

@end