AFNetworking网络框架的基本使用

// GET
- (void)get2
{
    // 1.创建AFN管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
 
    // 2.利用AFN管理者发送请求
    NSDictionary *params = @{
                             @"username" : @"520it",
                             @"pwd" : @"520it"
                             };
 
    [manager GET:@"http://120.25.226.186:32812/login" parameters:params success:^
(NSURLSessionDataTask *task, id responseObject) {
         NSLog(@"请求成功---%@", responseObject);
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        NSLog(@"请求失败---%@", error);
    }];
}
 
// POST
- (void)post2
{
    // 1.创建AFN管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
 
    // 2.利用AFN管理者发送请求
    NSDictionary *params = @{
                             @"username" : @"520it",
                             @"pwd" : @"520it"
                             };
 
    [manager POST:@"http://120.25.226.186:32812/login" parameters:params success:^
(NSURLSessionDataTask *task, id responseObject) {
        NSLog(@"请求成功---%@", responseObject);
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        NSLog(@"请求失败---%@", error);
    }];
}

创建AFHTTPRequestOperationManager
 
// 1.创建AFN管理者
    // AFHTTPRequestOperationManager内部包装了NSURLConnection
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
AFHTTPRequestOperationManager的GET\POST请求
 
// GET
- (NSURLSessionDataTask *)GET:(NSString *)URLString
                   parameters:(id)parameters
                      success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                      failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
 
// POST请求
- (NSURLSessionDataTask *)POST:(NSString *)URLString
                    parameters:(id)parameters
                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure

- (void)get
{
    // 1.创建AFN管理者
    // AFHTTPRequestOperationManager内部包装了NSURLConnection
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
 
    // 2.利用AFN管理者发送请求
    NSDictionary *params = @{
                             @"username" : @"520it",
                             @"pwd" : @"520it"
                             };
    [manager GET:@"http://120.25.226.186:32812/login" parameters:params success:^
(AFHTTPRequestOperation *operation, id responseObject) {
         NSLog(@"请求成功---%@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
         NSLog(@"请求失败---%@", error);
    }];
}
 
- (void)post
{
    // 1.创建AFN管理者
    // AFHTTPRequestOperationManager内部包装了NSURLConnection
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
 
    // 2.利用AFN管理者发送请求
    NSDictionary *params = @{
                             @"username" : @"520it",
                             @"pwd" : @"520it"
                             };
    [manager POST:@"http://120.25.226.186:32812/login" parameters:params success:^
(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"请求成功---%@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"请求失败---%@", error);
    }];
}

// 执行下载文件的方法,可以监控下载进度
- (void)downLoadMonitor
{
    // 1.创建网络管理者
    // AFHTTPSessionManager 基于NSURLSession
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
 
    // 2.利用网络管理者下载数据
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@
"http://120.25.226.186:32812/resources/videos/minion_02.mp4"]];
    /*
     destination
     - targetPath: 系统给我们自动写入的文件路径
     - block的返回值, 要求返回一个URL, 返回的这个URL就是剪切的位置的路径
     completionHandler
     - url :destination返回的URL == block的返回的路径
     */
    /*
     @property int64_t totalUnitCount;  需要下载文件的总大小
     @property int64_t completedUnitCount; 当前已经下载的大小
     */
    NSProgress *progress = nil;
    NSURLSessionDownloadTask *downTask = [manager downloadTaskWithRequest:request 
progress:&progress destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
 
        NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, 
NSUserDomainMask, YES) lastObject];
        NSString *path = [cachesPath stringByAppendingPathComponent:response.suggestedFilename];
        return [NSURL fileURLWithPath:path];
 
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
        NSLog(@"%@",filePath.absoluteString);
 
    }];
 
    /*
     要跟踪进度，需要使用 NSProgress，是在 iOS 7.0 推出的，专门用来跟踪进度的类！
     NSProgress只是一个对象！如何跟踪进度！-> KVO 对属性变化的监听！
     @property int64_t totalUnitCount;        总单位数
     @property int64_t completedUnitCount;    完成单位数
     */
    // 给Progress添加监听 KVO
    [progress addObserver:self forKeyPath:@"completedUnitCount" 
options:NSKeyValueObservingOptionNew context:nil];
 
    // 3.启动任务
    [downTask resume];
 
}
 
// 收到通知调用的方法
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(NSProgress *)object 
change:(NSDictionary *)change context:(void *)context
{
    NSLog(@"%f",1.0 * object.completedUnitCount / object.totalUnitCount);
    // 回到主队列刷新UI
    dispatch_async(dispatch_get_main_queue(), ^{
 
        self.progress.progress = 1.0 * object.completedUnitCount / object.totalUnitCount;
    });
}

// 1.创建AFN管理者
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
 
    // 默认请求二进制
    // 默认响应是JSON
 
    // 告诉AFN，支持接受 text/xml 的数据
    // [AFJSONResponseSerializer serializer].acceptableContentTypes = [NSSet 
setWithObject:@"text/xml"];
 
    // 告诉AFN如何解析数据
    // 告诉AFN客户端, 将返回的数据当做JSON来处理，默认的是以JSON处理
//    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    // 告诉AFN客户端, 将返回的数据当做XML来处理
//    manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
    // 告诉AFN客户端, 将返回的数据当做而进行来数据 (服务器返回什么就是什么)
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

// formData: 专门用于拼接需要上传的数据
- (NSURLSessionDataTask *)POST:(NSString *)URLString
                    parameters:(id)parameters
     constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
                    success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                    failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure

// 1.创建网络管理者
  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
  // 2.利用网络管理者上传数据
  NSDictionary *dict = @{@"username":@"Syl"};
  // formData: 专门用于拼接需要上传的数据
  [manager POST:@"http://120.25.226.186:32812/upload" parameters:dict 
constructingBodyWithBlock:
   ^void(id<AFMultipartFormData> formData) {
 
      /*
       Data: 需要上传的数据
       name: 服务器参数的名称
       fileName: 文件名称
       mimeType: 文件的类型
       */
      UIImage *image =[UIImage imageNamed:@"minion_02"];
      NSData *data = UIImagePNGRepresentation(image);
      [formData appendPartWithFileData:data name:@"file" fileName:@"abc.png" 
mimeType:@"image/png"];
 
      /*
       NSURL *url = [NSURL fileURLWithPath:@"/Users/apple/Desktop/
CertificateSigningRequest.certSigningRequest"];
       // 任意的二进制数据MIMEType application/octet-stream
       // [formData appendPartWithFileURL:url name:@"file" fileName:@"abc.cer" 
mimeType:@"application/octet-stream" error:nil];
       [formData appendPartWithFileURL:url name:@"file" error:nil];
      */
  } success:^void(NSURLSessionDataTask * task, id responseObject) {
      // 请求成功
      NSLog(@"请求成功 %@", responseObject);
  } failure:^void(NSURLSessionDataTask * task, NSError * error) {
      // 请求失败
      NSLog(@"请求失败 %@", error);
  }];

// 2.设置监听
    /*
     AFNetworkReachabilityStatusUnknown          = -1,  未识别
     AFNetworkReachabilityStatusNotReachable     = 0,   未连接
     AFNetworkReachabilityStatusReachableViaWWAN = 1,   3G
     AFNetworkReachabilityStatusReachableViaWiFi = 2,  wifi
     */
示例代码
 
AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];
 
// 提示：要监控网络连接状态，必须要先调用单例的startMonitoring方法
[manager startMonitoring];
 
[manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    NSLog(@"%d", status);
}];

// 1.检测wifi状态
    Reachability *wifi = [Reachability reachabilityForLocalWiFi];
 
    // 2.检测手机是否能上网络(WIFI\3G\2.5G)
    Reachability *conn = [Reachability reachabilityForInternetConnection];
 
    // 3.判断网络状态
    if ([wifi currentReachabilityStatus] != NotReachable) { // 有wifi
        NSLog(@"有wifi");
 
    } else if ([conn currentReachabilityStatus] != NotReachable) { 
// 没有使用wifi, 使用手机自带网络进行上网
        NSLog(@"使用手机自带网络进行上网");
 
    } else { // 没有网络
 
        NSLog(@"没有网络");
    }
①判断联网状态
 
// 用WIFI
// [wifi currentReachabilityStatus] != NotReachable
// [conn currentReachabilityStatus] != NotReachable
 
// 没有用WIFI, 只用了手机网络
// [wifi currentReachabilityStatus] == NotReachable
// [conn currentReachabilityStatus] != NotReachable
 
// 没有网络
// [wifi currentReachabilityStatus] == NotReachable
// [conn currentReachabilityStatus] == NotReachable
②实时监听网络状态
 
#import "ViewController.h"
#import "Reachability.h"
 
@interface HMViewController ()
@property (nonatomic, strong) Reachability *conn;
@end
 
@implementation HMViewController
 
- (void)viewDidLoad
{
    [super viewDidLoad];
 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkState)
 name:kReachabilityChangedNotification object:nil];
    self.conn = [Reachability reachabilityForInternetConnection];
    [self.conn startNotifier];
}
 
- (void)dealloc
{
    [self.conn stopNotifier];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}
 
- (void)checkNetworkState
{
    // 1.检测wifi状态
    Reachability *wifi = [Reachability reachabilityForLocalWiFi];
 
    // 2.检测手机是否能上网络(WIFI\3G\2.5G)
    Reachability *conn = [Reachability reachabilityForInternetConnection];
 
    // 3.判断网络状态
    if ([wifi currentReachabilityStatus] != NotReachable) { // 有wifi
        NSLog(@"有wifi");
 
    } else if ([conn currentReachabilityStatus] != NotReachable) { 
// 没有使用wifi, 使用手机自带网络进行上网
        NSLog(@"使用手机自带网络进行上网");
 
    } else { // 没有网络
 
        NSLog(@"没有网络");
    }
}
@end