I use the line
connect(ui->Ysim, SIGNAL(ui->Ysim->StartButton_Get()->click()),
this,SLOT(on_startButton_clicked()));
It works fine, the debugger takes me to the on_clicked method.However, I receive the message that
QObject::connect: No such signal
Do I need to provide another syntax? Or ho to get rid of the warning? (I guess it has some reason)
Related
This is about NodeJS and Express. I want to add an error handler that simply logs the error in my preferred way. This way also takes care of console output. I don't want, at this point in time anyway, to replace the functionality of the Express default error handler. I want the default error handler to continue doing its thing for the time being, with one exception: Since my logging already took place, and also covers console output, I want the default error handler to pretty much stop adding to the console.
My question is: How do I accomplish this? I did some searching and found nothing, so unsure if I may be using the wrong keywords.
I'm trying to understand how to handle errors in obj-c on the MediaPlayer and we had someone do some work to do this for us on the AVPlayer but the way that is handled on AVPlayer is different, from what I can see in the documentation, than how errors are handled on the MPMusicPlayerController.
There is something called an MPErrorDomain which is a type of ErrorDomain.
https://developer.apple.com/documentation/mediaplayer/mperrordomain?language=objc
Do I create an observer to listen for when this type of error object occurs?
I am really just looking to understand how to process when one of these errors occur
https://developer.apple.com/documentation/mediaplayer/mperrorcode?language=objc
Ultimately I want to process these error codes
https://developer.apple.com/documentation/mediaplayer/mperrorcode?language=objc
Do I create an observer to listen for when this type of error object occurs?
No. You just do stuff and either you get an error or you don't.
Some methods have error parameters in their completion handlers:
https://developer.apple.com/documentation/mediaplayer/mpmusicplayercontroller/2582424-preparetoplay
https://developer.apple.com/documentation/mediaplayer/mpmusicplayerapplicationcontroller/2815055-perform
Apart from that, you'll know you've got an error because the Console will say so (during debugging with Xcode).
I have an Adobe Air mobile application that has a NetConnection. One on call to my AMF server it makes the call and everything returns fine. When I make a second call my app crashes.
Anyone one run into this?
you're going to need to get more info. Run it in debug mode and you should get a stack trace, variable values and the like.
Figured it out. My models in the client and on the server didn't match. Why AIR just crash and didn't give me an error is weird.
Maybe your server client is the cause of the error!
It may be the reason of automatic combine of the two amf calls by NetConnection.
So, your function on server side will be run twice.
Check your require or require_one on server side.
I am working on Objective C to develop an app in I Pad. When I run the program its getting executed in Simulator of IPad. When I do the same connecting the device then I am facing an Error as GDB:Data Formatters temporarily unavailable,will re-try after a 'continue'.
Someone guide how to solve this issue.
Regards,
Vani.
This can be because of several reasons:
Memory issue. Try running your app with instruments to check
When it is unable to find a linked in shared library at launch time.
Also you can try running in a different target xcode and check if that works
Check all you breakpoints. In the Debugger window, click on "Show Breakpoints" and see if there are any unusually placed breakpoints
I also got the same problem in cocoa application.
Take a look at Data Formatters temporarily unavailable, will re-try after a 'continue'.
"Data Formatters temporarily unavailable, will re-try after a
'continue'." means that something has gone so horribly wrong in your
code that even the debugger bailed. As dragyn said, this usually
involves some form of rapid object creation or recursion calling. Add
a few NSLog lines into your code to help you see how far your code is
getting and where it might be looping/calling itself.
Could someone provide info about error-handling in wxWidgets or a pointer to documentation?
Specifically, I discovered this behavior: I try to create a wxImage from a file. This is in an event-handler. The file is not present. The call to the image constructor does not throw an exception. (I understand that no wxWidgets code throws exceptions.) A call to image.Ok() returns false. Fine. But after my event-handler exits, wxWidgets gratuitously pops up an error message dialog. That's okay for this particular application, but I wonder how to stop that from happening if I want to handle the error myself. I suspect that the dialog is coming from an event-handler, but I search for things like EVT_ERROR, and came up empty.
There is the class wxLogNull for suppressing those log messages. See http://docs.wxwidgets.org/stable/wx_wxlognull.html#wxlognull where also an example is given.
Read the wxLog overview for more details on how wxWidgets handles this.
You can define your own log target which would throw an exception if an error message is logged. Of course, then you'd probably need to catch it in your event handler anyhow as you probably don't want to just give the user a relatively useless "File couldn't be opened" message but rather a "Image couldn't be opened" one. And if you do this, then why not just test for file.IsOk() directly and use wxLogError() yourself? IOW you can do what you want but I don't really see how is it better than the traditional exception-less way of doing things in this particular case.