图像未通过 IOS 中的 POST 方法发送到 PHP Web 服务答案

【问题标题】：Image is not getting sent to the PHP web service through POST method in IOS图像未通过 IOS 中的 POST 方法发送到 PHP Web 服务
【发布时间】：2014-02-15 05:17:24
【问题描述】：

我们有一个 PHP Web 服务，可以将图像附加到电子邮件中，因为它正在将图像收集到全局文件数组中。传输数据的方法是 POST 方法。我正在发送图像，但它没有通过 POST 方法收集到 Web 服务中。谁能告诉我问题出在网络服务还是我的代码中。

下面是我用来发送图像的代码。

 NSString *tempString = [NSString stringWithFormat:@"sub1_fname=%@&sub1_lname=%@&sub1_email=%@&sub1_phone=%@&sub1_address=%@&sub1_city=%@&sub1_zip=%@&sub2_storage=%@&sub2_boxes=%@&sub2_oneman=%@&sub2_twoman=%@&sub2_heavy=%@&sub2_comments=%@&sub3_findus=%@&sub3_word=%@&sub3_praise=%@",f31fname,f31lname,f31email,f31phone,f31address,f31city,f31zip,f32storage,f32boxes,f32oneman,f32twoman,f32heavy,f32comments,f33findus,f33word,f33praise];

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

NSMutableURLRequest *request =[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://ommultiengg.com/form/form3.php"]];
[request setHTTPMethod:@"POST"];

NSString *postString =[NSString stringWithFormat:@"{\"sub2_image\":\"%@\"}",image];//post the image
[request setValue:[NSString
                   stringWithFormat:@"%lu", (unsigned long)[postString length]]
 forHTTPHeaderField:@"Content-length"];//get image length
[request setHTTPBody:[postString dataUsingEncoding:NSUTF8StringEncoding]];
[request setValue:@"application/x-www-form-urlencoded; charset=utf-8"     forHTTPHeaderField:@"Content-Type"];

[request setHTTPBody:[tempString dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

[connection start];

【问题讨论】：

你不能直接将图片存储到网络服务器，你需要遵循3个步骤，1. 图片到NSData 2. NSData 到NSString 3. NSString 被传递到服务器
你可以使用这个可以在任何类型的网络服务上工作的库：github.com/mineshpurohit/ServiceCallingUtility

标签： ios iphone objective-c post uiimage

【解决方案1】：

使用以下代码，您可以传递参数以及图像数据。

NSString *urlString = [NSString stringWithFormat:@"http://myAPIName/MethodName/test.php&username=%@&password=%@&image=%@&answer=%@&question_id=%@", username, password, imageName, answer, questionID];
NSLog(@"MyURL: %@",urlString);

urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
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 *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

NSString *str=[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"SourceImage\"; filename=\"Image_%@\"\r\n",[imagePath lastPathComponent]];
[body appendData:[[NSString stringWithString:str] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithContentsOfFile:imagePath]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPBody:body];

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

【讨论】：