AFNetworking简单用法

GET请求

 AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; 

 [manager GET:URL parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {  

 }
  success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {  

  NSLog(@"这里打印请求成功要做的事");  

 }

 failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull   error) {  

 NSLog(@"%@",error);  //这里打印错误信息

 }];

POST 请求

 AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

 NSMutableDictionary *parameters = @{@"":@"",@"":@""};

 [manager POST:URL parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {

 } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

 } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

 }];

下载

 //1.创建管理者对象
 NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
 AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:configuration];

 //2.确定请求的URL地址
 NSURL *url = [NSURL URLWithString:@""];

 //3.创建请求对象
 NSURLRequest *request = [NSURLRequest requestWithURL:url];

 //下载任务
 NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
     //打印下下载进度
     NSLog(@"%lf",1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount);

 } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
     //下载地址
     NSLog(@"默认下载地址:%@",targetPath);

     //设置下载路径，通过沙盒获取缓存地址，最后返回NSURL对象
     NSString *path = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:response.suggestedFilename];
     NSLog(@"%@", path);
     return [NSURL fileURLWithPath:path];

 } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {

     //下载完成调用的方法
     NSLog(@"下载完成：");
     NSLog(@"%@--%@",response,filePath);

 }];

 //开始启动任务
 [task resume];

上传

 NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
 AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

 NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];
 NSURLRequest *request = [NSURLRequest requestWithURL:URL];

 NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
 NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
     if (error) {
         NSLog(@"Error: %@", error);
     } else {
         NSLog(@"Success: %@ %@", response, responseObject);
     }
 }];
 [uploadTask resume];

监测当前网络状态（网络监听）

 {
     // 进行网络监测判断的BOOL值
     BOOL isOpen;
 }

 if (!isOpen) {

     // 打开网络监测的方法
     [[AFNetworkReachabilityManager sharedManager] startMonitoring];
     isOpen = YES;

 } else {

     // 关闭网络监测
     [[AFNetworkReachabilityManager sharedManager] stopMonitoring];
     isOpen = NO;
 }

 // 接下来会判断是WiFi状态，还是3g或4g状态，还有网络不可用状态
 [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

     switch (status) {
         case AFNetworkReachabilityStatusUnknown:
             NSLog(@"未知状态");
             break;

         case AFNetworkReachabilityStatusNotReachable:
             NSLog(@"未连接状态");
             break;

         case AFNetworkReachabilityStatusReachableViaWWAN:
             NSLog(@"手机流量网络");
             break;

         case AFNetworkReachabilityStatusReachableViaWiFi:
             NSLog(@"WiFi状态");
             break;

         default:
             break;
     }
 }];