iphone - 如何在 iOS 上将图片以 JSON 格式从图库上传到服务器

Question

如何将 iPhone 上图库中的图像作为 JSON 上传到服务器？我尝试了以下方法:

[Loading startLoading:YES];
NSString *urlString = [NSString stringWithFormat:@"http://railsboxtech.com/singing/jsn_song/register_response.php?accesstoken=%@",Access_Token];
//username, password, name, email, country
NSString *parameter = [NSString stringWithFormat:@"username=%@&password=%@&fname=%@&email=%@&lname=%@&btnImage4=%@",userField.text,passField.text,fnameField.text,emailField.text,lnameField.text,btnImage4];
NSConnection *conn = [[NSConnection alloc] initWithDelegate:self];
[conn sendRequest:urlString withParaMeter:parameter withMethod:@"POST" withTag:1];
[conn startAsynchronousRequest];

Answer 1

如果您想以字符串形式上传图像，您必须将图像数据转换为 Base64，然后您可以使用上述方法:-

要转换为 base64 字符串，请参阅 this Stack Overflow answer .然后您可以使用您的代码进行上传。

另一种方式

你可以像这样直接上传图片:

-(void)uploadImage
{       
    NSData *imageData = UIImagePNGRepresentation(yourImage);

    NSString *urlString = [ NSString stringWithFormat:@"http://yourUploadImageURl.php?intid=%@",1];

    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

    NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@\"\r\n", 1]] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [request setHTTPBody:body];

    [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
}