我正在尝试从iOS应用程序将图像上传到服务器的简单任务。然而,运行后我收到以下错误消息:
错误:错误域=NSCocoaErrorDomain代码=3840"JSON文本没有以数组或对象开头,并且没有设置允许片段的选项。"UserInfo={NSDebugDescription=JSON文本没有用数组或对象和不设置允许片段选项开头。}
知道为什么吗?以下是我分别针对客户端和服务器端的代码。
应用程序端代码:
-(void) uploadPhoto: (UIImage*) image{
NSString *urlString = @"myServerDNS.com/upload.php";
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
NSData *imageData = UIImageJPEGRepresentation(image, 0.8);
NSDictionary *parameters = @{@"foo":@"bar"};
[manager POST:urlString
parameters:parameters
constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
{[formData appendPartWithFormData:imageData name:@"file"];}
success:^(AFHTTPRequestOperation *operation, id responseObject)
{NSLog(@"Success: %@", responseObject);}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{NSLog(@"Error: %@", error);}
];
}
服务器端php代码:
<?php
$foo = $_POST["foo"];
$target_dir = "Folder/" . basename($_FILES["file"]["name"]);
if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_dir))
{
echo json_encode([
"Message" => "The file ". basename( $_FILES["file"]["name"]). " has been uploaded.",
"Status" => "OK"
]);
} else {
echo json_encode([
"Message" => "Sorry, there was an error uploading your file.",
"Status" => "Error"
]);
}
?>
好的,很抱歉,我意识到这是一个愚蠢的错误导致了这个问题。这只是因为我在php脚本的开头添加了一个echo "hello world";
,导致它触发JSON文本错误。删除了它,错误消息就消失了。
与我的问题中所述的错误消息不对应,但我的代码中存在的另一个错误是我使用了appendPartWithFormData
而不是appendPartWithFileData
。更改为后者后,图像上传到服务器即可工作。