我知道这个问题已经在堆栈溢出中被问过好几次了。但我仍然对此感到困惑。我试过使用
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", @"image/jpg", nil];
但是我仍然收到错误，直到我在我的php文件中添加header（"Content-type：application/json"）。但是我的 php 文件中没有 jason 结构。
我的ios方面是：
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSError *__autoreleasing* error;
// 2. Create an `NSMutableURLRequest`.
NSMutableURLRequest *request = [serializer multipartFormRequestWithMethod:@"POST" URLString:@"http://192.168.199.118/search.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData
name:@"uploadedfile"
fileName:@"image.jpg"
mimeType:@"image/jpg"];
} error:(NSError *__autoreleasing *)error];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", @"image/jpg", nil];
AFHTTPRequestOperation *operation =
[manager HTTPRequestOperationWithRequest:request
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Success %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure %@", error.description);
if (error.code == -1001) {
[self NetworkAlert:@"Resquest timed out. Please try again and check your network connection."];
}
}];
我的php方面是：
<?php
#function for streaming file to client
function streamFile($location, $filename, $mimeType='image/jpg')
{ if(!file_exists($location))
{ header ("HTTP/1.0 404 Not Found");
return;
}
//header("Content-Type: $mimeType");
header("Content-type:application/json");
readfile($location);
}
#**********************************************************
#Main script
#**********************************************************
header("Content-type:application/json");
#<1>set target path for storing photo uploads on the server
$photo_upload_path = "upload/";
$photo_upload_path = $photo_upload_path.basename( $_FILES['uploadedfile']['name']);
$photo_upload_indicator_path = "upload/image_ready";
#<2>set target path for storing result on the server
$downloadFileName = 'processed_';
$processed_photo_output_path = "output/processed_";
$processed_photo_output_path = $processed_photo_output_path.basename( $_FILES['uploadedfile']['name']);
$processed_photo_output_indicator_path = "output/result_ready";
$downloadFileName = $downloadFileName.basename( $_FILES['uploadedfile']['name']);
#<3>modify maximum allowable file size to 10MB and timeout to 300s
ini_set('upload_max_filesize', '10M');
ini_set('post_max_size', '10M');
ini_set('max_input_time', 300);
ini_set('max_execution_time', 300);
#<4>Get and stored uploaded photos on the server
if(copy($_FILES['uploadedfile']['tmp_name'], $photo_upload_path)) {
#<5>signal that the image is ready
$handle = fopen($photo_upload_indicator_path, 'w');
fprintf($handle, '%s', $photo_upload_path);
fclose($handle);
#<6>wait until the result is ready
while (!file_exists($processed_photo_output_indicator_path))
{
usleep(1000000);
}
usleep(1000000);
unlink($processed_photo_output_indicator_path);
#<7>stream processed photo to the client
streamFile($processed_photo_output_path, $downloadFileName,'image/jpg');
} else{
echo "There was an error uploading the file to $photo_upload_path !";
}
?>
header（"Content-type：application/json"）;帮助我解决问题。但我不知道为什么。如果删除此代码，我将始终收到"请求失败错误"。如果我想从带有图像的 php 服务器接收一些信息，哪种方式是最好的？非常感谢您的任何建议。
您的 PHP 脚本在注释#Main script正下方的行中设置一个Content-type标题
您应该删除它并使用正确的图像 mime 类型进行响应，image/jpeg（包括"e"）。AFNetworking附带一个响应序列化程序AFImageResponseSerializer，它会自动将具有内容类型image/jpeg的响应解码为UIImage：
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFImageResponseSerializer serializer];
AFHTTPRequestOperation *operation =
[manager HTTPRequestOperationWithRequest:request
success:^(AFHTTPRequestOperation *operation, UIImage *responseImage) {
NSLog(@"Success %@", responseImage);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure %@", error.description);
if (error.code == -1001) {
[self NetworkAlert:@"Resquest timed out. Please try again and check your network connection."];
}
}];