When I update tilesets on mapbox, changes don't appear in the iOS app unless I re-install it. There is seemingly documentation on this here: https://docs.mapbox.com/ios/api/maps/5.2.0/Classes/MGLOfflineStorage.html#/c:objc(cs)MGLOfflineStorage(im)setMaximumAmbientCacheSize:withCompletionHandler: but I can't figure out how exactly to implement it. I don't have an MGLOfflineStorage object because I am not worried about offline map storage right now, I just want to refresh the cache in the app. There are good examples of how to do this in android, but not on iOS. Any help is appreciated (preferably in swift)
It appears to be correct to call the methods on the shared MGLOfflineStorage object. The method parameter should be a closure containing any code you want to execute upon completion.
MGLOfflineStorage.shared.invalidateAmbientCache { error in
print("Invalidated")
}
Naturally you should check the error in the usual 'safe' way.
Related
According to documentation, RestorableBool class is a RestorableProperty that knows how to store and restore a bool. One example of RestorableBool is given by flutter itself in the flutter gallery project.
The same result can be achieved by using simple boolean. Click here to get the code of same screen using simple bool.
Is there any special benefits for RestorableBool over usual bool or is there any special context at which we have to use RestorableBool?
Anyone to help?Thanks in advance.
Mobile operating systems fool you into thinking all the apps you have open are actually running. But they are not. The topmost is running, all others are killed. Their last screenshot is kept to uphold the illusion of being able to hold multiple apps open.
When you "switch apps", what happens is that the app that wasn't in the foreground is opened and it's state is restored from memory.
If you don't do anything, your app cannot handle this and will just start as if it was started from scratch.
In Flutter, the Restoration Manager can help you store your state and restore your state. Other options are available, I think hydrated_bloc is probably useful if you are working with bloc patterns.
The example in your code doesn't do the same thing, well it does in your code, but it wouldn't in all cases.
The difference is that RestorableBool is reset to it's initial state, even if it is already in that state, meanwhile your code flips the bool to the opposite value.
Thanks in advance.
We have to use HERE map's Turn by turn navigation feature in one of our Flutter application, we have added billing in the developer account and have created the necessary keys.
When we try HERE map examples they have provided, we get everything except maneuver instructions that shows the user when to turn right/left/go straight for some distance etc.
I'm new to this and I have no idea how to get this, we never get events on the listener and it only shows updating there, am I missing something ?
this is how it looks right now, Updating...
I think we should be getting the progress here, but we are not getting it here...
_visualNavigator.routeProgressListener = Navigation.RouteProgressListener((routeProgress) { }
Please look into the provided example app. It shows here how to get the maneuver actions.
Your screenshot shows a different app, so make sure everything works with the example app, at first. The app offers to run a simulation mode. This should work. If you run the example app with real GPS updates, you may need to go outside and move to get location updates. This should also work.
If this still does not work, it could either mean that your device has an issue with getting GPS locations. Some iPads, for example, lack support. Or that you have disabled getting location updates. You can cross-check this when trying the positioning_app example from the same repository that shows how to get location updates.
A last point may be to clarify what events you get and what you miss: There are multiple event listeners providing real-time information during guidance - if you have only an issue with maneuvers, then most likely you can solve your issue by following strictly the code of the example app.
Note that previous HERE SDK versions, prior to HERE SDK 4.13.0, only provided empty maneuver instruction texts during guidance when they have been taken from the route instance. Make sure to take this information from the VisualNavigator instead.
Is there option to reuse result of initialize method for video_player package? It takes time for complete - it would be great to cache it (eg. memory level) and reuse it when you back to before used video - and simple use cached data instead of wait for initialize result. I need it for intensive switching between videos.
There is a package called cached_video_player which may help resolve your problem. Check it out here.
I think you are asking about having the screen/page/widget pre-render. That is not currently supported by flutter according to this issue filed on github:
https://github.com/flutter/uxr/issues/6#issuecomment-881918751
Sure, but this is not very scalable and will quickly turn into a mess. It's much simpler and more flexible to just give MyRoute someway it can cache the next route, and then show that cached route when it needs. But flutter doesn't support this as everything needs to be 'on-stage' before it can be initialized. In AIR, or Unity, I could simply construct my new page, and it would begin loading data, I could then toss it on stage whenever I want.
PS. You probably already know you can pre-cache the video data/file itself.
I'm close to getting my homegrown POS app to work with Square, but I'm missing something simple and can't seem to turn up an answer. I'm using FileMaker Go as the app, but I don't think that that is relevant to my current proof-of-concept issue. It may be relevant to other issues later (callbacks).
In my point-of-sale-api settings, I have:
com.filemaker.go.17
for the Bundle ID, and
create-workflow
for the iOS App URL Schemes, which seems to be the first piece of code that Square allows me to save. Any prefixed item such as shortcuts://create-workflow gives an error without description (I'm hoping that Square will trigger a workflow as a test in this POC).
I'm hoping to just trigger safari or workflow/shortcuts with the callback as filemaker go doesn't directly accept the callback response without a helper application - which I'll eventually try.
Any thoughts on what I'm missing?
Thanks tons!
I am currently trying to make some modifications to the incoming WebRTC video stream in the AppRTC app for iOS in Swift (which in turn is based on this Objective-C version). To do so, I need access to the data which is stored in the frame objects of class RTCI420Frame (which is a basic class for the Objective-C implementation of libWebRTC). In particular, I need an array of bytes: [UInt8] and Size of the frames. This data is to be used for further processing & addition of some filters.
The problem is, all the operations on RTCVideoTrack / RTCEAGLVideoView are done under the hood of pre-compiled libWebRTC.a, it is compiled from the official WebRTC repository linked above and it's fairly complicated to get a custom build of it, so I'd prefer to go with the build available in the example iOS project; in my understanding it's supposed to have all the available functionality in it.
I was looking into RTCVideoChatViewController class and in particular, remoteView / remoteVideoTrack, but had no success in accessing the frames themselves, spent a lot of time researching the libWebRTC sources in official repo but still can't wrap my head around the problem of accessing the frames data for own manipulations with it. Would be glad for any help!
Just after posting the question I had a luck in finding the sneaky data!
You have to add the following property to RTCEAGLVideoView.h file:
#property(atomic, strong) RTCI420Frame* i420Frame;
In the original implementation file there is the i420Frame property but it wasn't exposed in the iOS project's header file for the class. Adding the property allows you to get view's current frame.
I'm still in search of a more elegant way of getting the stream data directly, without the need to look into remoteView contents, will update the answer once I find it.