I want to know how to use a variable which is staying in a do-catch statement. I'm parsing some JSON from the web and filling an object with it but then I need that object outside to fill a UITableView. The function where I get web info:
func post(dburl: String, info: String, completionHandler: (NSString?, NSError?) -> ()) -> NSURLSessionTask {
let myUrl = NSURL(string: dburl)!;
let request = NSMutableURLRequest(URL:myUrl);
request.HTTPMethod = "POST";
let postString = info //finalPlaceId = info
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);
let task = NSURLSession.sharedSession().dataTaskWithRequest(request)
{ data, response, error in dispatch_async(dispatch_get_main_queue()) {
guard data != nil else {
completionHandler(nil, error)
return
}
completionHandler(NSString(data: data!, encoding: NSUTF8StringEncoding), nil)
}
}
task.resume()
return task
}
So, I call the function and inside I do the do-catch:
post(dburl, info: finalPlaceId) { responseString , error in
guard responseString != nil else {
print(error)
return
}
do { if let dataDB = responseString!.dataUsingEncoding(NSUTF8StringEncoding) {
var error: NSError?
let jsonDB = try NSJSONSerialization.JSONObjectWithData(dataDB, options:[])
//print(jsonDB)
if let infoArray = jsonResults["results"] as? [NSDictionary] {
if let infoArrayDB = jsonDB as? [NSDictionary] {
for item in infoArray {
for item2 in infoArrayDB {
self.JSON_Info.append(JSONInfo(json: item))
self.JSON_Info.append(JSONInfo(json: item2))
}
}
print(infoArrayDB)
}
}
}
} catch { print("Fetch Failed:\(error as NSError).localizedDescription)")
}
// print(responseString!)
}
Is it possible to now use JSON_Info out of this function? If not, even taking the other variables would be enough so I could do the for loops out of the function. Ideally I'd like to use infoArray and infoArrayDB out of the function. I appreciate your help.
First create object declaration class :
var infoArray : [NSDictionary]?
var infoArrayDB : [NSDictionary]?
post(dburl, info: finalPlaceId) { responseString , error in
guard responseString != nil else {
print(error)
return
}
do { if let dataDB = responseString!.dataUsingEncoding(NSUTF8StringEncoding) {
var error: NSError?
let jsonDB = try NSJSONSerialization.JSONObjectWithData(dataDB, options:[])
//print(jsonDB)
if let infoArray = jsonResults["results"] as? [NSDictionary] {
self.infoArray = infoArray
if let infoArrayDB = jsonDB as? [NSDictionary] {
self.infoArrayDB = infoArray
for item in infoArray {
for item2 in infoArrayDB {
self.JSON_Info.append(JSONInfo(json: item))
self.JSON_Info.append(JSONInfo(json: item2))
}
}
print(infoArrayDB)
}
}
}
} catch { print("Fetch Failed:\(error as NSError).localizedDescription)")
}
// print(responseString!)
}
Now you can check anywhere you want user
if let infoArray = self.infoArray{
/// Do whatever you want
}