iOS ASI--文件上传

1.文件上传的示例代码

    // 设置url

    NSURL *url = [NSURL URLWithString:@"http://localhost/photo"];

    // 设置请求

    self.postRequest = [ASIFormDataRequest requestWithURL:url];

    // 指定要上传文件的路径

    NSString *file = [[NSBundle mainBundle] pathForResource:@"123.txt" ofType:nil];

   // 设置和文件相关的参数

　 [self.postRequest setFile:file forKey:@"file"]; // 方法1,客户端本地文件的文件名是是什么,传到服务器端的文件名就是什么

    // [self.postRequest setFile:file withFileName:@"newName.txt" andContentType:@"text/plain" forKey:@"file"]; // 方法2,可以自定义文件名

    // NSData *data = [NSData dataWithContentsOfFile:file]; // 方法3,在无法获取本地文件的path时,适合用这个方法,比如拍照上传

    // [self.postRequest setData:data forKey:@"file"];

    // 设置其他请求参数

    [self.postRequest setPostValue:@"ios" forKey:@"username"];

    [self.postRequest setPostValue:@"123" forKey:@"pwd"];

    // 接收到服务器返回的数据

    [self.postRequest setCompletionBlock:^{

        NSLog(@"上传完咯");

    }];

    // 发起请求

    [self.postRequest startAsynchronous];

2.照片上传

2.1先把照片写入相册. 写入前,需要用户授权,iOS会自动处理授权;照片写入相册后,可以在模拟器的相册里看到照片

    UIImage *image = [UIImage imageNamed:@"123.png"];

    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

2.2 获取照片

// 打开相册

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    [self pickPhoto];

}

- (void)pickPhoto{

    UIImagePickerController *pick = [[UIImagePickerController alloc]init];

    pick.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //设置照片来源,第1个和第3个差不多,都是来源相册;第2个是来源相机

　　//    UIImagePickerControllerSourceTypePhotoLibrary,

　　//    UIImagePickerControllerSourceTypeCamera,

　　//    UIImagePickerControllerSourceTypeSavedPhotosAlbum

    pick.delegate = self; //要做照片选择器的代理,需要遵守2个协议UINavigationControllerDelegate, UIImagePickerControllerDelegate

    [self presentViewController:pick animated:YES completion:nil];

}

#pragma mark - UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    [self dismissViewControllerAnimated:YES completion:nil];

    UIImage *image = info[UIImagePickerControllerOriginalImage];

    [self upload:image];

}

- (void)upload:(UIImage *)image{

    // 设置url

    NSURL *url = [NSURL URLWithString:@"http://localhost/photo"];

    // 设置请求

    self.postRequest = [ASIFormDataRequest requestWithURL:url];

    NSData *data = UIImagePNGRepresentation(image);

    [self.postRequest setData:data withFileName:@"newImage.png" andContentType:@"image/png" forKey:@"file"];

    // 设置其他请求参数

    [self.postRequest setPostValue:@"ios" forKey:@"username"];

    [self.postRequest setPostValue:@"123" forKey:@"pwd"];

    // 接收到服务器返回的数据

    [self.postRequest setCompletionBlock:^{

        NSLog(@"上传完咯");

    }];

    // 发起请求

    [self.postRequest startAsynchronous];

}

注:上面的代码是上传相册里的照片,如果是上传相机刚刚拍好的照片,只需要把  pick.sourceType = UIImagePickerControllerSourceTypePhotoLibrary, 改成pick.sourceType = UIImagePickerControllerSourceTypeCamera,其他代码不用改.

3.大文件上传,要注意大文件上传不要用data上传,应该用file上传,因为把大文件序列化成NSData很耗性能,也没那么大的内存

    // 设置url

    NSURL *url = [NSURL URLWithString:@"http://localhost/bigDataFolder"];

    // 设置请求

    self.postRequest = [ASIFormDataRequest requestWithURL:url];

    // 假设大文件在cache里

    NSString *cache = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];

    NSString *filePath = [cache stringByAppendingPathComponent:@"data.zip"];

    [self.postRequest setFile:filePath forKey:@"file"];

    // 设置其他请求参数

    [self.postRequest setPostValue:@"ios" forKey:@"username"];

    [self.postRequest setPostValue:@"123" forKey:@"pwd"];

    // 上传进度

    self.postRequest.uploadProgressDelegate = self.progressView;

    // 监听请求

    [self.postRequest setCompletionBlock:^{

        NSLog(@"上传完咯");

    }];

    // 发起请求

    [self.postRequest startAsynchronous];

补充:ASI不支持断点上传,ASI是基于HTTP协议,而HTTP协议不支持断点上传,TCP/IP支持