I'm trying to assign a table view to an already existing UIView object on my storyboard but every time I assign it by specifying the correct frame I get an issue.
let sampleTable = AKTableView(AKTable(file: sampleReferences[indexPath.row].sampleFile!), frame: samplePlot.bounds)
samplePlot.addSubview(sampleTable)
This is the code I'm using at the moment. I've also used samplePlot.frame.
Basically the sampleReferences[indexPath.row].sampleFile! is an AKAudioFile stored earlier from a recording stored as a reference from a UITableView element. It's quite a large program split into multiple files so it's hard to show everything.
The only extra issue I can think of is I haven't stopped any of the current AudioKit processes. I'm not sure if the table can only be drawn at startup.
The following works with a .sine specifier AKTable(.sine) so it's not an issue with my UI code. It also fails when trying to load even a basic .mp3 file from .resources.
Update:
I've compressed the test .mp3 file significatly and shortened it's overall length to 2 seconds and I'm still getting the same issue. I think it might be an issue with the actual function used to draw the file. Although I could be wrong.
Another update:
So everything works fine using the following code
let file = EZAudioFile(url: sampleAudio!.url)
guard let data = file?.getWaveformData() else {
print("Failed to get waveform data")
return }
let waveform = EZAudioPlot()
waveform.frame = samplePlot.bounds
waveform.plotType = EZPlotType.buffer
waveform.shouldFill = true
waveform.shouldMirror = true
waveform.color = UIColor.black
waveform.updateBuffer(data.buffers[0], withBufferSize: data.bufferSize )
samplePlot.addSubview(waveform)
but obviously I'm using EZAudioPlot. I grabbed this from a previous stack overflow issue for the same thing and edited it a bit.
Related
I'm currently trying to use UIVideoEditorViewController to trim a video file previously selected from the Photos app by using UIImagePickerController. I verified that after choosing the file and before creating UIVideoEditorViewController the file has the original resolution. However, after trimming the video, the output is always in 360p resolution despite setting the videoQuality property to high. All the applicable settings seem to be ignored for this property and the video ends up being compressed unnecessarily.
I have found multiple people reporting similar issues but yet have to find a workaround for this.
let editor = UIVideoEditorController()
editor.delegate = self
editor.videoMaximumDuration = 0 // No limit for now
// TODO: This should really work, however while testing it seems like the imported videos are always scaled down
// to 320p which equivalents the default value of .low.
editor.videoQuality = .typeHigh
editor.videoPath = internalURL.path
Any help would be greatly appreciated.
I need to show progress while uploading/downloading data from Firebase database.
Can I get it?. I saw in Firebase storage but I didn't saw in Firebase database.
Progress based on data:
I recommend looking over this post, as it will help you understand how to use some of the built in data references to determine your upload progress. While it is not for iOS, it explains the thought process of how you can measure upload progress.
You can always use a progress monitor like such:
let observer = uploadTask.observeStatus(.Progress) { snapshot in
print(snapshot.progress) // NSProgress object
}
Progress based on count:
As to what FrankvanPuffelen said, there is in fact no tool to give you what you are asking for. However, as Jay states, you can determine the "progress" of your task(s) based on how you are reading/writing.
Say for instance you are writing (uploading) 10 photos. For each photo that is successfully written (uploaded), you can simply increment some sort of progress meter by 1/10.
Example for some local file on the users device:
// Some image on the device
let localFile = URL(string: "<PATH>")!
// Make a reference to the file that needs to be uploaded
let riversRef = storageRef.child("chicken.jpg")
// Upload the file to the path you specified
let uploadTask = riversRef.putFile(from: localFile, metadata: nil) { metadata, error in
if let error = error {
// Whoops, something went wrong :(
}
else {
// Tada! Uploaded file
someCountVariable += 1
// If needed / applicable
// let downloadURL = metadata!.downloadURL()
}
}
Of course for one (1) item you will go from 0 to 100 (..real quick - shout out to Drake), but this can just be nested in some loop that iterates through some list of items to upload. Then per each item successfully uploaded increment.
This will be more expensive in terms of requests if you need to upload objects other than multiple images, but for the purpose this will give you a nice visual / numeric way of tracking at least how many items are left to be successfully uploaded.
If you really want to get down to the nitty gritty, you can always try checking the current connection strength to determine a relative data transfer speed, and cross that with the current task you are attempting. This could potentially give you at least some estimate the progress based on how long the process should take to how long it actually has taken.
Hope some of this helps / points you in the right direction. Happy coding!
val bytesTransferred=taskSnapshot.bytesTransferred.toFloat()
val totalByteCount=taskSnapshot.totalByteCount.toFloat()
val progress = bytesTransferred / totalByteCount
Log.d("progress", (progress*100).toString())
Log.d("progressDivide", (bytesTransferred / totalByteCount).toString())
Log.d("progressbytesTransferred", bytesTransferred.toString())
Log.d("progresstotalByteCount", totalByteCount.toString())
Using this class I am trying to load a gif url into UIImageView.
The thing is , for some url's it takes 10 seconds to load, others 2 seconds.
I have tried almost anything, but still the process is too slow. 1 second would be good, but i had never succeed getting there.
I have also tried with UIWebview which had its own issues .
Here is the code :
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
let fileUrl = NSURL(string:"http://45.media.tumblr.com/6785bae27b8f888fe825f0ade95796a3/tumblr_noenkbeTSw1qjmwryo1_500.gif" )
let gif = UIImage.animatedImageWithAnimatedGIFURL(fileUrl!)
dispatch_async(dispatch_get_main_queue()) {
self.player.image = gif
}
}
The problem with most of the GIF reading tools I have looked at is that they read all the data in at load time and that they allocate memory for all of the decoded frames and hold all that uncompressed data in memory at the same time. This will lead to runtime performance problems and it will crash your app and possibly your device on large/long gifs. On the issue of loading time, there is not all that much you can do since the data does need to be downloaded and read. You are also just assuming that the network cache is going to handle hitting the same GIF over and over without going to the network again, which may or may not work well for you. For a solution that addresses these issues, see this SO Question or you can also take a look at the flipboard solution here.
I would like to be able to redirect my logging statements to a file so that I can retrieve them when my app runs standalone (i.e. is not attached to Xcode). I have discovered (thank you Stackoverflow) that freopen can be used to accomplish this.
If I create a new Xcode project and add the code to redirect stderr then everything works as expected.
However, when I add the redirection code to my existing, bluetooth project I am having trouble. The file is being created and I can retrieve it using iTunes or Xcode's Devices window, but it is of size 0. If I explicitly close the file then the text that I wrote actually makes it into the file. It is as though iOS is not flushing the file when the app is terminated. I suspect that the trouble stems from the fact that I have enabled background processing. Can anyone help me to understand this?
Here is my code:
let pathes = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true);
let filePath = NSURL(fileURLWithPath: pathes[0]).URLByAppendingPathComponent("Test.log")
freopen(filePath.path!, "a", stderr);
fputs("Hello, Samantha!\r\n", stderr);
struct StderrOutputStream: OutputStreamType {
static let stream = StderrOutputStream()
func write(string: String) {fputs(string, stderr)}
}
var errStream = StderrOutputStream.stream
print("Hello, Robert", toStream: &errStream)
fclose(stderr) // Without this the text does not make it into the file.
I'd leave this as a comment, but have you looked into NSFileHandle? It sounds like you just need a way to append data to the end of a text file, correct?
Once you have a handle with something like NSFileHandle(forWritingToURL:), you can use .seekToEndOfFile() and .writeData(_:). As a side note, you'll need to convert your String to Data before writing it.
Admittedly, this will probably end up being more lines of code, and you'll almost certainly need to take threading into consideration.
Im trying to load(and upload) images in my app(by picture path).
This is working in my simulator. everything works there. only when im trying to do this on the iphone itself it won't work and i see just the empty UIImageviews.
The paths are loaded the same as in the simulator. And originate from:
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: nil)
{
imageData,dataUTI,orientation,info in
cell.setString(info["PHImageFileSandboxExtensionTokenKey"] as String,name:dataUTI as String)
}
And the PHImageFileSandboxExtentionTokenKey is split into the data and the url when loading the image.
this results in the simulator as :
/Users/Twizzler/Library/Developer/CoreSimulator/Devices/3E671415-8B83-44DA-870F-19BF2BC11F8F/data/Containers/Data/Application/8872109F-3784-40EB-BEB6-4E9FDABE013D/Documents/1613945_10200645161051698_4122753901212984922_n.jpg
and in the iphone as:
/private/var/mobile/Media/DCIM/102APPLE/IMG_2607.JPG
Im loading the image like this:
let image = UIImage(named: "/private/var/mobile/Media/DCIM/102APPLE/IMG_2607.JPG")
cell.imageView.image = image
in this case i put the image url hardcoded (this is in the final app an array of images)
I don't get an error or stack trace. When placeing a breakpoint im seeing the image information in the same way as the simulator
as suggested by the answer im now trying to load them as follows:
let image = UIImage(contentsOfFile: "/private/var/mobile/Media/DCIM/102APPLE/IMG_2607.JPG")
cell.imageView.image = image
This isn't working and i can't upload the files
That’s not how imageNamed works—as the documentation states, that looks for an image with the given name inside your app’s bundle. Try imageWithContentsOfFile.
Well i fixed it! after some puzzling days im now using this way to access upload and
cell.imageView.image = UIImage(data: array[indexPath.row][0] as NSData)
This shows the image. I can save the NSData in the CoreData and reload the image on this way.
To lighten the load on the system im using this:
cellData.checked = 1
var imageData = UIImageJPEGRepresentation(cell.imageView.image, 1)
self.array.append([imageData,cellData.imageData] )
let myObj : ViewControllerImagePicker = self.parentViewController as ViewControllerImagePicker
let textfield: UILabel = myObj.amountLabel! as UILabel
textfield.text = String(self.array.count )
cell.textLabel.alpha = 1
this code is being called when there is clicked on a cell. by setting the cellData.imageData i can recall the cells (when clicking back to the collection view)
I do not know if the way im doing it is correct or works with more that 10 files because of data usage problems. But in my case with a max of 6 selected pictures it works like a charm
The simulator works completely different than a real device when it comes to files, the app bundle and sandboxing.
For starters the simulator will let you write to and add or change files in your app bundle. iOS running on a real device won't let you do this.
You can't hardcode any paths in your app. Even if it works today or on your device in test mode that doesn't mean it will work on a released version. And even if it does it could stop working on any update. Apple several times has changed where things are stored and the path structure in the phone. And where you are allowed to write.
Make bundle calls to get the path locations of standard folders.
Use the assets library to load images from the photo library, or to save them there.
There are tons of resources and tutorials online on how to do this.