AFNetworking: Send image from file - ios

Question

I am trying to send a multi-part post request which includes an image. The following code works fine:
manager.POST( apiUrl + "/location/add",
parameters: parameters,
constructingBodyWithBlock: { (formData : AFMultipartFormData!) -> Void in
// formData.appendPartWithFileURL(NSURL(string: location.imagePath!), name: "image", error: nil)},
formData.appendPartWithFileData(img, name: imgParam, fileName: "randomimagename.jpg", mimeType: "image/jpeg")},
success: { (operation: AFHTTPRequestOperation!,responseObject: AnyObject!) in
println("JSON: " + responseObject.description)
var dict = responseObject as NSDictionary
let json = JSONValue(dict)
var message = ""
if let msg = json["message"].string {message = msg}
var success = false
if let s = json["success"].bool {
callback(success: success, msg: message)
}
},
failure: { (operation: AFHTTPRequestOperation!,error: NSError!) in
println("Error: " + error.localizedDescription)
var apiError = ApiError()
apiError.noConnection = true
errorCallback(apiError: apiError)
})
I want to use appendPartWithFileURL instead of appendPartWithFileData. If I replace the 5th line wiht the line which is commented out in the code above, I get the following compiler error:
Extra argument 'constructingBodyWithBlock' in call
Does anybody know how to resolve this?
edit: Found a (very, very, very strange) solution. Replace the line
formData.appendPartWithFileURL(NSURL(string: location.imagePath!), name: "image", error: nil)},
with
var temp = formData.appendPartWithFileURL(NSURL(string: location.imagePath!), name: "image", error: nil)},
I didn't change anything beside adding var temp =. I have no idea why this is working, but it does. Seems to be a strange bug.

Answer 1

If you haven't solved this problem yet, try casting location.imagePath to String.
I had the same problem till I've added as String in the following code:
func uploadFile(file: NSData, url: String, formData: NSDictionary, parameters: NSDictionary, completion: AnyObject -> Void, failure: NSError -> Void) {
operationManager.requestSerializer = AFJSONRequestSerializer() as AFHTTPRequestSerializer
if operationManager.reachabilityManager.networkReachabilityStatus != .NotReachable {
operationManager.POST(url, parameters: parameters, constructingBodyWithBlock: { (data) in
data.appendPartWithFileData(file, name: formData["fileName"] as String, fileName: formData["fileName"] as String, mimeType: formData["mimeType"] as String)
}, success: { (operation, responseObject) in
completion(responseObject)
}, failure: { (operation, error) in
failure(error)
})
} else {
showReachabilityAlert()
}
}
Hope it helps.

Answer 2

I kept receiving this error until I cast the URL as a string. Here's what I was doing (and receiving the error while doing so):
let manager = AFHTTPSessionManager()
let fullUrl = NSURL(string: name, relativeToURL: NSURL(string: apiBaseEndpoint))
manager.POST(fullUrl, parameters: nil, constructingBodyWithBlock: { (formData) in
formData.appendPartWithFormData(file, name: "image")
}, success: { (operation, responseObject) in
NSLog("hit success")
}, failure: { (operation, error) in
NSLog("hit the error")
})
To resolve the issue, I simply changed the assignment of fullUrl to take a string rather than NSURL by adding .absoluteString.
let fullUrl = NSURL(string: name, relativeToURL: NSURL(string: apiBaseEndpoint)).absoluteString