Sorry for my english. I tried to use EventEmitter inside Meteor + React, but when I emit an event - nothing happen. When I console.log main Event object, it seems like all ok. Are there any instructions or example about it? Thanks.
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Currently I am learning react. can anyone tell me what is the main application usage of react hooks and how can we take more advantage of using hooks with react.?
Basically, before if a component had state or needed to utilize a lifecycle method, we had to use a class, which requires a bunch of extra code.
Now that is not the case. With hooks, instead of ever having to use a class, we could just always use a function.
Tyler McGinnis wrote good blog post about it here
https://tylermcginnis.com/why-react-hooks/
I am trying to use React-VR with Socket.io. I am crashing when I try to import socket.io-client(v2.0.4). I have to browse through examples without coming up with a solution.
Putting your socket.io calls in componentDidMount as opposed to the constructor would be the correct way of doing this I beleive.
I currently have a project in Xamarin and I am using MvvmCross. I have an MvxActionBarActivity that hosts MvxFragments. Now when I want to close the entire MvxActionBarActivity, the event begins in the Fragment and I want to tell the MvxActionBarActivity to close. Calling Close(this) in the fragment viewmodel is not working.
I have considered using MvxMessegner to send message from one viewmodel to the other but due to the relationship of a fragment and an activity I am wondering if there is a better way to do this.
Any help would be much appreciated.
Thank you!
When you want to close an Activity you need to call Finish(). This will close that activity and go back to that what is on the backstack.
If you want to call that from your viewmodel you should use a custom presenter: http://gregshackles.com/presenters-in-mvvmcross-navigating-android-with-fragments/
I am new to eventBus() function in SAPUI5.
I am using eventBus.publish() in Table.view.js controller to publish data & have used eventBus.subscribe() in MainPage.view.js controller. It is working fine.
But while I try to implement eventBus.subscribe() in another controller ("Feed.view.js"), it is not working. Why is it so?
The cause of you problem is likely one of the following:
You are not using the same EventBus in all cases (e.g. in one case
you use the sap.ui.getCore().getEventBus(), and in another case you
use your component's oComponent.getEventBus())
You are not using the same channel
You are not using the same event ID
Please check this, and if it doesn't help post more of your code.
I'm trying to create an NPAPI plugin to listen to the Media Keys on a macbook and pass that to javascript to control things like pandora or soundcloud. I'm using Spotify's SPMediaKeyTap library, which just wraps CGEventTap running on a separate thread.
My problem is that I use npn_invoke to call back to javascript. This works normally, but when it's triggered from the CGEventTap callback, it crashes the plugin. I realize this needs to be run from the plugin thread, and I've tried to pass it back to the main thread both by using [NSObject performSelectorOnMainThread] and [NSObject performSelector:onThread] with the thread i've stored away in the main plugin threads create method. Both of these solutions still crash on any npn call. Is there anything else that goes on when handling a CGEventTap event that causes state to be invalid for NPN browser interaction calls?
Don't try to second guess the threading model by saving the thread like you are; just use performSelectorOnMainThread to call NPN methods. I do this all the time and it works fine, so I'm guessing that something with your method of cross-thread marshalling isn't working the way it needs to.