AFNetWorking 上传& 下载

创建下载任务

- (void)downLoad{
  //1.创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //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 *filePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
        return [NSURL fileURLWithPath:filePath];


    } 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];
}

创建上传任务

/**
 *  AFN 3.0 上传
 *      有两种方式
 *          upLoad1 和 upLoad2
 */

//第一种方法是通过工程中的文件进行上传
- (void)upLoad1{

    //1。创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

    //2.上传文件
    NSDictionary *dict = @{@"username":@"1234"};

    NSString *urlString = @"url";
    [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        //上传文件参数
        UIImage *iamge = [UIImage imageNamed:@"123.png"];
        NSData *data = UIImagePNGRepresentation(iamge);
        //这个就是参数
        [formData appendPartWithFileData:data name:@"file" fileName:@"123.png" mimeType:@"image/png"];

    } progress:^(NSProgress * _Nonnull uploadProgress) {

        //打印下上传进度
        NSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

        //请求成功
        NSLog(@"请求成功:%@",responseObject);

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

        //请求失败
        NSLog(@"请求失败:%@",error);
    }];

}

//第二种是通过URL来获取路径,进入沙盒或者系统相册等等
- (void)upLoda2{
    //1.创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.上传文件
    NSDictionary *dict = @{@"username":@"1234"};

    NSString *urlString = @"url";
    [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) {

        //打印下上传进度
        NSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

        //请求成功
        NSLog(@"请求成功:%@",responseObject);

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

        //请求失败
        NSLog(@"请求失败:%@",error);
    }];
}
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