ios - 将图像作为二进制文件发送到服务器

Question

下面是我将图像发送到服务器以获取有关图像的信息的属性。

    NSDictionary* parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"en_US", @"image_request[locale]", @"en", @"image_request[language]",[NSURL URLWithString:@"<file url>"], @"image_request[image]", nil];

使用下面的代码上传图片:

    NSData *imageData = UIImageJPEGRepresentation(image, 0.1);

但是参数要求我提供 url。有什么方法可以让我在拍摄照片并将其上传到服务器并获取该 url 并将其附加到参数或任何可找到的替代方案中。我使用 Unirest http 库发送请求。

Answer 1

为了使用 Unirest 将用相机拍摄的图像传输到 CamFind API，您需要先复制图像。

// Get the path to the Documents folder
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectoryPath = [paths objectAtIndex:0];

// Get the path to an file named "tmp_image.jpg" in the Documents folder
NSString *imagePath = [documentDirectoryPath stringByAppendingPathComponent:@"tmp_image.jpg"];
NSURL *imageURL = [NSURL fileURLWithPath:imagePath];

// Write the image to an file called "tmp_image.jpg" in the Documents folder
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
[imageData writeToURL:imageURL atomically:YES];

// Now construct the parameters that will be passed to Unirest
NSDictionary* parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"en_US", @"image_request[locale]", @"en", @"image_request[language]", imageURL, @"image_request[image]", nil];

// And the headers
NSDictionary* headers = [NSDictionary dictionaryWithObjectsAndKeys:@"<mashape-key>", @"X-Mashape-Authorization", nil];

// Call the API using Unirest
HttpJsonResponse* response = [[Unirest post:^(BodyRequest* request) {
    [request setUrl:@"https://camfind.p.mashape.com/image_requests"];
    [request setHeaders:headers];
    [request setParameters:parameters];
}] asJson];