Why is the cancel button in my media picker not working? - ios

I'm a new developer and I'm getting to know music and sound in iOS.
I've managed to make a media picker where the user can select music but when I press the cancel button, nothing happens. This is the method I'm using:
- (void) mediaPickerDidCancel: (MPMediaPickerController *) mediaPicker
{
[self dismissViewControllerAnimated:YES completion:nil];
}
I tried putting an NSLog in it to see if it was actually being called and there was nothing in the console so it's not actually being called at all. Is there a reason and solution that can be concluded with this information? Have I simply missed out something or might have not done something elsewhere?
Any help would be greatly appreciated.
If the code I used for the media picker would be helpful, here it is:
MPMediaPickerController *mediaPicker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAnyAudio];
[mediaPicker setDelegate:self];
mediaPicker.prompt = NSLocalizedString(#"text1", "text2");
[self presentViewController:mediaPicker animated:YES completion:nil];

I wonder if you need to do:
- (void) mediaPickerDidCancel: (MPMediaPickerController *) mediaPicker
{
[mediaPicker dismissViewControllerAnimated:YES completion:nil];
}
instead?
Also, set a break point within your "mediaPickerDidCancel" method and just see it the breakpoint even hits when hitting the cancel button in the picker.

In Swift :
func mediaPickerDidCancel(mediaPicker: MPMediaPickerController){
// Dismiss the picker if the user canceled
dismissViewControllerAnimated(true, completion: nil)
}

Related

iOS UIImagePickerController black screen on iPad

I'm meeting another strange problem....
I allow users to take photo. To do that, I'm using UIImagePickerController.
With iPhone, it's working, but with iPad (iOS 8, I don't know for others versions), I have a black screen preview.
This is my code :
- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller usingDelegate: (id <UIImagePickerControllerDelegate, UINavigationControllerDelegate>) delegate {
if (([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera] == NO) || (delegate == nil) || (controller == nil))
return NO;
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraUI.allowsEditing = NO;
cameraUI.delegate = delegate;
[self presentViewController:cameraUI animated:YES completion:NULL];
return YES;
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSLog(#"photo taken");
}
So when the user click on the button, I've the view to take the photo which appears. But the screen is black, and when I click on the button to take the photo, there is nothing.... and didFinishPickingMediaWithInfo isn't called.
(I see more topics, but I don't found any solution for this problem.)
Thanks,
Make sure you run UIKit operations on main thread. Check also if you app has permissions to use camera [in device settings].
This can also be an issue.(If it helps someone.)
Try this its solved my problem, make sure that there is a value
(Application name as string) in your info.plist > "Bundle display name".
In my case it was empty and because of that it didn't work.
If "Bundle display name" is not there in the info.plist,then add a row named "Bundle display name" and paste your appname .

iOS 7 and the MPMediaPicker, why plus?

I've got two strange diverging behaviours between iOS 6 and 7.
I want to present the MPMediaPicker to the end user, allow them to select 1 song, and start playing that back to them.
So, I show them the MPMediaPicker (/not/ multi, and /not/ cloud, if supported).
Two problems:
In iOS6, the first screen in MPMediaPicker shows the songs. In iOS7,
it's the (empty) playlists. How can I force the MPMediaPicker to
show songs as the default first screen? Is this just another example of Apple "knowing best"?
In iOS7 I get a red (+) symbol next to the media items in the list. What
causes that? I haven't been able to turn up any references for that
in google. What is the (+) symbol? It doesn't seem to highlight separately from the line in the table. The native media picker doesn't display this.
Thanks!
-Ken
Our MPMediaPicker code:
- (void)showSongPicker {
// TODO check if iOS 6
MPMediaPickerController* songPicker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic];
songPicker.delegate = self;
songPicker.allowsPickingMultipleItems = NO;
songPicker.showsCloudItems = NO;
[self presentViewController:songPicker animated:YES completion:nil];
[self presentModalViewController:songPicker animated:YES];
}
#pragma mark MPMediaPickerControllerDelegate
- (void)mediaPicker: (MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
MPMediaItem* item = [mediaItemCollection.items objectAtIndex:0];
[self playMediaItem:item];
[self mediaPickerDidCancel:mediaPicker];
}
- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
[self dismissViewControllerAnimated:YES completion:nil];
}
Oh! I do apologise. I'd forgotten to answer this.
Since I didn't get an answer from anyone else (until just now, thanks, lap.felix), I filed it as a technical question with Apple.
Their answer?
There's no programmatic way to affect the behaviour of the picker. If you need to change the behaviour this "drastically", you have to roll your own media picker.
So...yeah...thanks, Apple.
-Ken
The + doesn't mean anything other than "Add this item to the picker selection"

UiImagePickerController - more than one photo

Iphone app, IOS 5 and up.
There are similar questions to this one on SO but I haven't encountered this exact scenario so I'll ask. I'm editing an existing app that allows lets you take a photo which it resizes and sends to a web service.
I need to add the ability to take 3 photos, resize each and send to the same service. I thought it would be just a matter of repeating what was already in the app but it uses the UIImagePickerController which apparently only allows one photo per use.
So the way it works is that there's a 'Take Photo' button which calls the method below. Once that photo is taken another button appears that says 'Take another photo' (I added this button) and I have it calling the same method but it is just copying over the previous photo, which is to be expected really. How should I best alter this to accommodate 3 photos?
This is the takephoto method that I'm calling.
- (IBAction)takePhoto:(id)sender
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:NULL];
}
check this https://developer.apple.com/library/ios/samplecode/photopicker/Introduction/Intro.html
, check the take photo part of this demo project.
Eventually figured out how to do this. I added a tag to the button calling the method, through IB.
Then in the takephoto method I assigned the imagePickerController a tag based on the tag of the button that tapped. Like this:
- (IBAction)takePhoto:(id)sender
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
if([sender tag] == 2)
{
imagePickerController.view.tag = 2;
}
//And so on...
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:NULL];
}
Then in the ImagePickerController didFinishedPickingMediaWithInfo method:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
if(picker.view.tag == 2)
{
//Do stuff here
}
}
So, I'll probably have to create three different buttons for each of the three possible photos, I'm sure there's a better way than that but it should work.

UIButton's click(IBAction) not getting triggered programatically

I have a simple UIButton in a viewController.
- (IBAction)btnEnter:(id)sender {
..
..
}
Now I want to trigger the button press action programatically one of library functions (didFinishPickingmediaWithInfo) gets executed
- (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
{
// Do Something
txtBoxAboveEnterButton = #"Data populated successfully";
[self btnEnter:nil];
[reader dismissModalViewControllerAnimated: YES];
}
The function is getting called and the text box above Enter button is getting populated with the dummy text but click is not getting triggered. Please help me out!
The method you are calling is btnEnter with no parameter. It doesn't look like you have that defined. Try passing a paramter like nil or self to it:
[self btnEnter:nil];

iOS 5 GM: <Error>: More than maximum 5 filtered album lists trying to register. This will fail

I know this thread existed before, but was closed as only appearing in iOS5 beta 6.
By now I have the Golden Master of iOS 5 on my phone and that error still appears.
This is happening when I create a UIImagePickerController with a sourceType of UIImagePickerControllerSourceTypePhotoLibrary more than 5 times. I am, as far as I can tell, creating and releasing the previous UIImagePickerController correctly each time.
Edit: adding code, as requested.
UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
ipc.delegate = self;
ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:ipc animated:YES];
[ipc release];
Later, I call [self dismissModalViewControllerAnimated:YES]; when -imagePickerController:didFinishPickingImage:editingInfo: gets called.
The problem happens in Apple examples, so the best bet is to ignore.
Later, I call [self dismissModalViewControllerAnimated:YES]; when
-imagePickerController:didFinishPickingImage:editingInfo: gets called.
Have you tried to set the delegate of the image picker to nil, in didFinishPickingImage ?
This is not your fault.It may be vary in different version.Apple should solve this issue.Main thing is that you should check for memory leak is important.Thanks
Try this UIImagePickerControllerSourceTypePhotoLibrary Error
I hope it will help
try setting
picker=nil
in the
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self dismissModalViewControllerAnimated:YES];
picker = nil;
}
it works for me......
Try this one, i am sure this is gonna help you;
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self setModalInPopover:YES];
}

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