Updating UI as the result of a request handler

Question

I have a setup like this;

startup() {
    ...
    self.gcdWebServer.addHandlerForMethod("GET", path: "/hide", 
        requestClass: GCDWebServerRequest.self, asyncProcessBlock: {request in self.hide()})
    ...
}

func hide() -> GCDWebServerDataResponse {
    self.view.hidden = true;
    print("hide")
    return GCDWebServerDataResponse(statusCode: 200)
}

When a request to /hide is made, the console shows the print() call immediately, but the view does not disappear for some arbitrary delay, somewhere between 10-30 seconds.

How can I have the request immediately result in the view being hidden?

Try calling `self.view.hidden = true` from the main thread – redent84 Feb 08 '16 at 09:37 — redent84, Feb 08 '16 at 09:37

score 3 · Answer 1 · answered Feb 08 '16 at 09:38

3

Wrap you r UI related login inside dispatch async and run it on main thread:

dispatch_async(dispatch_get_main_queue(),{

    self.view.hidden = true;

 })

answered Feb 08 '16 at 09:38

Greg

25,317
6
53
62

score 3 · Accepted Answer · answered Feb 08 '16 at 09:39

3

Try this one, calling hidden on main thread.

dispatch_async(dispatch_get_main_queue(),{
   self.view.hidden = true;
})

answered Feb 08 '16 at 09:39

turushan

690
7
25

score 3 · Answer 3 · answered Feb 08 '16 at 09:40

Rewrite your hide method as below. You need update UI on main thread only.

func hide() -> GCDWebServerDataResponse {
    dispatch_async(dispatch_get_main_queue(),{
        self.view.hidden = true
    })
    print("hide")
    return GCDWebServerDataResponse(statusCode: 200)
}

score 3 · Answer 4 · answered Feb 08 '16 at 09:45

3

UI update code write in main thread only.

 dispatch_async(dispatch_get_main_queue(),{

        self.view.hidden = true;

     })

answered Feb 08 '16 at 09:45

Aruna kumari

329
1
11

Updating UI as the result of a request handler

4 Answers4