Question

我正在尝试上传图片以及一些表单字段。我可以使用以下链接作为参考将图像上传到服务器。

File Upload to HTTP server in iphone programming

但是如果我尝试发送一些表单字段和图像我是错误响应。这是我正在使用的代码

-(void)saveData{
NSString *urlString = @"Sample url";
    NSString *filename = @"filename";
    NSMutableURLRequest *request= [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];
    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];
    NSMutableData *postbody = [NSMutableData data];
    [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postbody appendData:[self generateDataFromText:FORM DATA IN JSON fieldName:@"add_product"]];
    [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"%@.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
    [postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [postbody appendData:[NSData dataWithData:fileData]];
    [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [request setHTTPBody:postbody];
    [request setValue:APIKEY forHTTPHeaderField:@"X-API-KEY"];

    NSURLResponse *urlResp;
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResp error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    NSHTTPURLResponse *resp = (NSHTTPURLResponse *) urlResp;
    NSLog(@"status code: %ld, response string: %@",(long)[resp statusCode],returnString);
}

 -(NSMutableData *)generateDataFromText:(NSString *)dataText fieldName:(NSString *)fieldName
{
    NSString *post = [NSString stringWithFormat:@"--AaB03x\r\nContent-Disposition: form-data; name=\"%@\"\r\n\r\n", fieldName];
    // Get the post header int ASCII format:
    NSData *postHeaderData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    // Generate the mutable data variable:
    NSMutableData *postData = [[NSMutableData alloc] initWithLength:[postHeaderData length]];
    [postData setData:postHeaderData];
    NSData *uploadData = [dataText dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    // Add the text:
    [postData appendData: uploadData];
    // Add the closing boundry:
    [postData appendData: [@"\r\n" dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]];
    // Return the post data:
    return postData;
}

所以有人请帮我用POST方法将表单数据和am image一起发送到PHP服务器。提前致谢。

Answer 1

每个字段应位于其自己的边界@“\ r \ n - ％@ \ r \ n”。因此，请进行以下更改以使代码正常工作。

删除该行：

[postbody appendData:[self generateDataFromText:FORM DATA IN JSON fieldName:@"add_product"]];

行后

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

输入以下代码：

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; add_product=\"%@\"\r\n\r\n",key] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[self generateDataFromText:FORM DATA IN JSON] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithString:@"\r\n--%@\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

对于每个字段，您需要添加这4行。

您应该考虑使用AFNetworking。它很容易上班。

使用AFNetworking非常容易。通过Cocoapods将AFNetworking添加到您的项目中，以下是说明： https://github.com/AFNetworking/AFNetworking

设置AFNetworking后，请使用以下代码：

NSString *apiName = URL;

UIImage *yourImage;
NSData *imgData = UIImageJPEGRepresentation(yourImage,1.0);
imgData = [imgData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];];

NSData *otherFields = [self generateDataFromText:FORM DATA IN JSON];

NSDictionary * params = [[NSDictionary alloc] initWithObjectsAndKeys:imgData, @"imgFieldName",otherFields,@"add_product",nil]; 

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];



[manager POST:apiName parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {

  //posted successfully


} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    //failed

}];

这是一个非常简单的Post方法，其图像采用Base64编码。您可以根据需要在params字典中添加任意数量的字段。

在POST方法中将post变量和Image一起发送到php服务器

1 个答案: