topic Re: AGSQueryTaskDelegate not firing in ArcGIS Runtime SDK for iOS Questions

AGSQueryTaskDelegate not firing

NicoleDe_La_Feld — Fri, 06 Dec 2013 06:26:56 GMT

I am trying to query all the features from my database through a querytask, but no delegate methods are being invoked.
I created a strong property AGSQueryTask :

@interface MyClass : NSObject <AGSQueryTaskDelegate>

@property(nonatomic, strong)AGSQueryTask* queryTask;

set the delegate as self:

 self.queryTask.delegate = self;

but nothing happens.
Ideas?

Re: AGSQueryTaskDelegate not firing

ChristopherBarger — Sat, 11 Dec 2021 08:12:48 GMT

sorry if i'm misunderstand your question but you'll need to set up a query to excecute your query task. Here is a simplified example.


//alongside your agsquerytask set up an agsquery
@property(nonatomic, strong)AGSQueryTask* queryTask;
@property(nonatomic, strong)AGSQuery* query;

after setting up that query, maybe in viewDidLoad or wherever you'd like the query to happen you'll need to do something like this.


//set up query task
self.queryTask = [AGSQueryTask queryTaskWithURL:[NSURL URLWithString: "your URL"]]; 
self.queryTask.delegate = self; 

//set up query and options
self.query = [AGSQuery query]; 
self.query.outFields = [NSArray arrayWithObjects: "*", nil]; 
self.query.where = @"1=1";

//execute querytask with query 
[self.queryTask executeWithQuery: self.query];

with that in place you should reach
queryTask operation didExecuteWithFeatureSetResult retreivedFeatureSet
where you will have access to whatever was returned from your query.

Hope this helps.

Re: AGSQueryTaskDelegate not firing

NicoleDe_La_Feld — Tue, 10 Dec 2013 06:31:56 GMT

Thank you for your answer. I already did what you say and it's right.
The problem was that I accidentally deallocated the queryTask before the operation was completed.