GET請求

/** 請求網絡 */
- (void)loadNetwork{
    //發送請求
    [SVProgressHUD showWithStatus:@"加載中"];
    // 請求參數
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"a"] = @"1";
    params[@"action"] = @"2";
    params[@"c"] = @"3";
    [[AFHTTPSessionManager manager]GET:@"http://api.xxx.com/api/api_open.php" parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        [SVProgressHUD dismiss];
        //數組轉模型
        self.tags = [WYRecommendTagModel mj_objectArrayWithKeyValuesArray:responseObject];
        //不刷新不出現
        [self.tableView reloadData];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [SVProgressHUD setMinimumDismissTimeInterval:1];
        [SVProgressHUD showErrorWithStatus:@"加載失敗"];
    }];
}

POST請求

/** 請求網絡 */
- (void)loadNetwork{
    //發送請求
    [SVProgressHUD showWithStatus:@"加載中"];
    // 請求參數
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"a"] = @"1";
    params[@"action"] = @"2";
    params[@"c"] = @"3";
    [[AFHTTPSessionManager manager]POST:@"http://api.xxx.com/api/api_open.php" parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        [SVProgressHUD dismiss];
        //數組轉模型
        self.tags = [WYRecommendTagModel mj_objectArrayWithKeyValuesArray:responseObject];
        //不刷新不出現
        [self.tableView reloadData];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [SVProgressHUD setMinimumDismissTimeInterval:1];
        [SVProgressHUD showErrorWithStatus:@"加載失敗"];
    }];
}

AFN3.0下載方法

/** AFN3.0 下載  */
- (void)downLoad{
    //1.創建管理者對象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.確定請求的URL地址
    NSURL *url = [NSURL URLWithString:@""];
    //3.創建請求對象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    //下載任務
    NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
        //打印下下載進度
        WKNSLog(@"%lf",1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount);
    } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
        //下載地址
        WKNSLog(@"默認下載地址:%@",targetPath);
        //設置下載路徑，通過沙盒獲取緩存地址，最后返回NSURL對象
        NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
        return [NSURL URLWithString:filePath];
    } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
        //下載完成調用的方法
        WKNSLog(@"下載完成：");
        WKNSLog(@"%@--%@",response,filePath);
    }];
    //開始啟動任務
    [task resume];
}

AFN3.0 上傳

/**
 *  AFN 3.0 上傳
 *  有兩種方式
 *  upLoad1 和 upLoad2
 */
//第一種方法是通過工程中的文件進行上傳
- (void)upLoad1{
    //1。創建管理者對象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.上傳文件
    NSDictionary *dict = @{@"username":@"1234"};
    NSString *urlString = @"22222";
    [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        //上傳文件參數
        UIImage *iamge = [UIImage imageNamed:@"123.png"];
        NSData *data = UIImagePNGRepresentation(iamge);
        //這個就是參數
        [formData appendPartWithFileData:data name:@"file" fileName:@"123.png" mimeType:@"image/png"];
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        //打印下上傳進度
        WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        //請求成功
        WKNSLog(@"請求成功：%@",responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        //請求失敗
        WKNSLog(@"請求失敗：%@",error);
    }];
}

//第二種是通過URL來獲取路徑，進入沙盒或者系統相冊等等
- (void)upLoda2{
    //1.創建管理者對象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.上傳文件
    NSDictionary *dict = @{@"username":@"1234"};
    NSString *urlString = @"22222";
    [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"文件地址"] name:@"file" fileName:@"1234.png" mimeType:@"application/octet-stream" error:nil];
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        //打印下上傳進度
        WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        //請求成功
        WKNSLog(@"請求成功：%@",responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        //請求失敗
        WKNSLog(@"請求失敗：%@",error);
    }];
}

監測當前網絡狀態（網絡監聽）

- (void)AFNetworkStatus{
    //1.創建網絡監測者
    AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];
    /*枚舉里面四個狀態  分別對應 未知 無網絡 數據 WiFi
     typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
         AFNetworkReachabilityStatusUnknown          = -1,      未知
         AFNetworkReachabilityStatusNotReachable     = 0,       無網絡
         AFNetworkReachabilityStatusReachableViaWWAN = 1,       蜂窩數據網絡
         AFNetworkReachabilityStatusReachableViaWiFi = 2,       WiFi
     };
     */
    [manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        //這里是監測到網絡改變的block  可以寫成switch方便
        //在里面可以隨便寫事件
        switch (status) {
            case AFNetworkReachabilityStatusUnknown:
                WKNSLog(@"未知網絡狀態");
                break;
            case AFNetworkReachabilityStatusNotReachable:
                WKNSLog(@"無網絡");
                break;
            case AFNetworkReachabilityStatusReachableViaWWAN:
                WKNSLog(@"蜂窩數據網");
                break;
            case AFNetworkReachabilityStatusReachableViaWiFi:
                WKNSLog(@"WiFi網絡");
                break;
            default:
                break;
        }
    }] ;
}

勤學如早春之苗，不見其增，日有所漲。
輟學如磨刀之石，不見其減，日有所損。