My application has a 'Browse' button with these codes that allows user to browse the iPad's photo gallery, select a photo and store it into the application using NSDocumentDirectory.
- (IBAction) BrowsePhoto:(id)sender
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.delegate = self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:imagePickerController];
[popover setPopoverContentSize:CGSizeMake(320,320)];
[popover presentPopoverFromRect:CGRectMake(200,200,-100,-100) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
self.popoverController = popover;
[imagePickerController release];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo
{
[self.popoverController dismissPopoverAnimated:YES];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDir stringByAppendingPathComponent:#"SavedImage.png"];
UIImage *image = imageView.image;
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:NO];
}
Now i want to include a 'Display' button which displays all the photos from the NSDocumentDirectory in a new view. Was thinking of displaying it in thumbnails and also when an image is tapped, it will have a pop up asking the user to confirm if he/she wants to delete the selected photo. If yes, the photo will be removed from the NSDocumentDirectory.
Is it possible to do this? If it is, mind telling me how to do it and share some sample codes? I'm quite lost as i'm still quite new to programming.
Everything you need to do with files is implemented in system class called NSFileManager.
It's not complicated. Try to read the documentation and google some examples. There is a lot of them, e.g. http://www.theappcodeblog.com/2011/04/04/nsfilemanager-tutorial-create-read-and-delete-a-file/
Related
hello I need to build app that record video from iPhone camera.
I search in the net and not found notting that works in iOS 9.
I get this code from this git project :
https://github.com/versluis/Video-Recorder
This code open camera but not allow Me to take a video.
- (IBAction)recordButton:(id)sender {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
picker.allowsEditing = NO;
NSArray *mediaTypes = [[NSArray alloc]initWithObjects:(NSString *)kUTTypeMovie, nil];
picker.mediaTypes = mediaTypes;
[self presentViewController:picker animated:YES completion:nil];
} else {
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:nil message:#"I'm afraid there's no camera on this device!" delegate:nil cancelButtonTitle:#"Dang!" otherButtonTitles:nil, nil];
[alertView show];
}
}
- (IBAction)playbackButton:(id)sender {
// pick a video from the documents directory
NSURL *video = [self grabFileURL:#"video.mov"];
// create a movie player view controller
MPMoviePlayerViewController * controller = [[MPMoviePlayerViewController alloc]initWithContentURL:video];
[controller.moviePlayer prepareToPlay];
[controller.moviePlayer play];
// and present it
[self presentMoviePlayerViewControllerAnimated:controller];
}
#pragma mark - Delegate Methods
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
// user hit cancel
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
// grab our movie URL
NSURL *chosenMovie = [info objectForKey:UIImagePickerControllerMediaURL];
// save it to the documents directory
NSURL *fileURL = [self grabFileURL:#"video.mov"];
NSData *movieData = [NSData dataWithContentsOfURL:chosenMovie];
[movieData writeToURL:fileURL atomically:YES];
// save it to the Camera Roll
UISaveVideoAtPathToSavedPhotosAlbum([chosenMovie path], nil, nil, nil);
// and dismiss the picker
[self dismissViewControllerAnimated:YES completion:nil];
}
- (NSURL*)grabFileURL:(NSString *)fileName {
// find Documents directory
NSURL *documentsURL = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
// append a file name to it
documentsURL = [documentsURL URLByAppendingPathComponent:fileName];
return documentsURL;
}
Ray gave pretty good tutorial about this. Hope it helped.
Was wandering if anyone can offer some insight. For the life of me I can't figure out how to send a UIImage with UIActivityTypeMessage all though some say it is possible.
The docs say:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIActivity_Class/Reference/Reference.html
UIActivityTypeMessage
The object posts the provided content to the Messages app. When using this service, you can provide NSString and NSAttributedString objects as data for the activity items. You may also specify NSURL objects whose contents use the sms scheme.
Available in iOS 6.0 and later.
Declared in UIActivity.h.
So to my understanding I can only send NSString/NSURL. I don't see you it is possible.
I'm using this:
UIImage *image; // some image here.
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:#[ image ] applicationActivities:nil];
Any help would be much appreciated.
Here's how to use UIActivityViewController universally, with text and an image.
NSMutableArray *items = [NSMutableArray new];
[items addObject:#"Hello world!"];
[items addObject:[UIImage imageNamed:#"MyImage"]];
NSArray *activityItems = [NSArray arrayWithArray:items];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
[self presentViewController:activityViewController animated:YES completion:nil];
} else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
UIPopoverController *aPopoverController = [[UIPopoverController alloc] initWithContentViewController:activityViewController];
[aPopoverController presentPopoverFromBarButtonItem:self.actionButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
// Examples:
// iPhone:
// http://anglerally.com/wp-content/uploads/2012/09/6-Default-568h#2x.png
// http://anglerally.com/wp-content/uploads/2012/09/7-Default-568h#2x.png
// iPad:
// http://anglerally.com/wp-content/uploads/2012/09/6-Default-Portrait#2xipad.png
// http://anglerally.com/wp-content/uploads/2012/09/7-Default-Portrait#2xipad.png
While it seems possible to get the message app to appear in the share sheet using UIActivityViewController in iOS6, there is some secret to get it to work--iOS7 is a different story, passing the NSURL to the asset works out of the box.
Not sure you are getting your images from the ALAssetsLibrary, but if so, grab the ALAsset using its NSURL rather than pulling the UIImage. The share sheet appears in a fraction of the time. This isn't exactly the code I'm using, but similar. But on iOS6, the activity view controller will not show the messages app so long as there is an image attached.
- (void) presentActivityViewController:(ALAsset*) asset {
// add this to your viewController class
NSDictionary *urls = [asset valueForProperty:ALAssetPropertyURLs];
NSURL *url;
if ([urls count]) {
for (NSString *key in urls) {
// I'm making an assumption that the URL I want is the first URL in the dictionary
url = [urls objectForKey:key];
break;
}
}
NSArray *activityItems = #[url];
UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
[self presentViewController:activityController animated:YES completion:nil];
}
Alright, this problem is rather bizarre, and I'm 99% positive at this point it's not a retain/release error. Basically I'm using UIImagePickerController to grab an image from either the library or the camera, but the resulting image causes some... strange things to happen. Though it's laggy to pull the image up in a detail view controller containing a UIImageView, the real problem is that if I repetitively pull up the view controller and dismiss it, eventually parts of the image will have disappeared!!! More disturbingly, if I attempt to pull it up again after this has happened, the whole image will have turned black, and other UIViews throughout both my App AND the iPhone itself will either flicker wildly or have turned black!!!! For example, both the iPhone wallpaper and the initial "slide to unlock" panel turn black and flicker, respectively... It makes no difference whether the photo came from the library or the camera. The problem is entirely averted (no lag, no blackness) if I do something like this:
//UIImage* image = (UIImage*)[info objectForKey:UIImagePickerControllerOriginalImage];
UIImage* image = [[UIImage alloc] initWithData:
[NSData dataWithContentsOfURL:
[NSURL URLWithString:
#"http://wild-facts.com/wp-content/uploads/2010/07/Diving_emperor_penguin.jpg"]]];
Thus I can't imagine the problem having to do with anything other than the UIImagePickerController. Note that I'm still creating and dismissing it-- I'm just not grabbing the image out of it.
At first I thought the image was simply being overreleased, and the disappearing black chunks were parts of memory being overwritten. However, changing the image's retain count makes no difference. Then I thought, maybe the image is too large and somehow not getting properly released when I dismiss the UIImageView! Yet downloading a several MB image from the internet will not replicate the error. Then I thought, maybe the UIImagePickerController is disposing of the image, regardless of retain count! But copying the image failed as well. Furthermore, how could any of these things effect views that exist as deep as the iOS level?! I've researched, experimented, and Googled and no one has encountered this problem except for me... yet I'm not doing particularly strange! Is this an Apple issue? Did I forget something obvious? I've scanned up and down the documentation and guides to no avail, but perhaps I missed something.
None of this has worked:
Incrementing the retain count
Using [image copy]
None of this has replicated the problem with the downloaded image:
Decrementing the retain count
Downloading an image of size greater than 1 MB with large dimensions
I'm using the latest Verizon iPhone with iOS 4.2.8 (base SDK "overriden" to 4.3, whatever that means). 4.2.8 is the latest possible one for Verizon, though 4.3 is available for iPhones using AT&T.
Here's the code in glorious detail. I'm not yet checking for device compatibility, but it shouldn't matter concerning this. Perhaps I forgot some setting with the UIImagePickerController?
Quick Overview: I display an action sheet, then based on the user's input, display the image picker. I save the image as a transformable attribute on a Core Data object (delivery) using a custom transformer. I later hand the image to a detail view controller to display to the user.
IGDeliveryVC.m (parts of it, anyways. It's a tableview displaying the delivery's added media)
- (void)refresh
{
[mediaDisplayArray release];
NSSortDescriptor* sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:#"displayIndex" ascending:YES];
mediaDisplayArray = [[NSMutableArray alloc] initWithArray:
[delivery.deliveryMedia sortedArrayUsingDescriptors:
[NSArray arrayWithObject:sortDescriptor]]];
if (mediaDisplayArray == nil)
mediaDisplayArray = [[NSMutableArray alloc] init];
[self.tableView reloadData];
}
- (void)onAddMedia:(id)sender
{
#if TARGET_IPHONE_SIMULATOR
UIImage* image = [[UIImage alloc] initWithData:
[NSData dataWithContentsOfURL:
[NSURL URLWithString:
#"http://wild-facts.com/wp-content/uploads/2010/07/Diving_emperor_penguin.jpg"]]];
[delivery addImage:image];
[self refresh];
[image release];
return;
#endif
UIActionSheet *options = [[UIActionSheet alloc] initWithTitle:#"Add Media from..."
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:#"Camera", #"Library", nil];
[options showFromToolbar:self.navigationController.toolbar];
[options release];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex != 0 && buttonIndex != 1)
return;
UIImagePickerController* picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.mediaTypes = [NSArray arrayWithObjects:#"public.image",#"public.movie", nil];
switch (buttonIndex)
{
case 0:
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
break;
case 1:
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
break;
}
[self presentModalViewController:picker animated:YES];
}
- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker
{
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
[picker release];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString* mediaType = (NSString*)[info objectForKey:UIImagePickerControllerMediaType];
if ([mediaType isEqualToString:#"public.image"])
{
UIImage* image = (UIImage*)[info objectForKey:UIImagePickerControllerOriginalImage];
//UIImage* image = [[UIImage alloc] initWithData:
// [NSData dataWithContentsOfURL:
// [NSURL URLWithString:
// #"http://wild-facts.com/wp-content/uploads/2010/07/Diving_emperor_penguin.jpg"]]];
[delivery addImage:image];
}
else if ([mediaType isEqualToString:#"public.movie"])
{
NSString* videoURL = (NSString*)[info objectForKey:UIImagePickerControllerMediaURL];
[delivery addVideo:videoURL];
}
else
{
NSLog(#"Error: imagePickerController returned with unexpected type %#", mediaType);
}
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
[picker release];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
IGMedia* media = [mediaDisplayArray objectAtIndex:indexPath.row];
UIViewController* detailViewController =
[media isMemberOfClass:[IGMediaImage class]]
? [[IGMediaImageDetailVC alloc] initWithImage:((IGMediaImage*)media).image]
: nil;
if (detailViewController != nil)
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
IGMediaImageDetailVC.h (I use a xib :P )
#import <UIKit/UIKit.h>
#interface IGMediaImageDetailVC : UIViewController {
}
#property (nonatomic, retain) UIImage* image;
#property (nonatomic, retain) IBOutlet UIImageView* imageView;
- (id)initWithImage:(UIImage*)anImage;
#end
IGMediaImageDetailVC.m
#import "IGMediaImageDetailVC.h"
#implementation IGMediaImageDetailVC
#synthesize image;
#synthesize imageView;
- (id)initWithImage:(UIImage*)anImage
{
self = [super initWithNibName:#"IGMediaImageDetailVC" bundle:nil];
if (self)
{
self.image = anImage;
}
return self;
}
- (void)dealloc
{
[image release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
self.imageView.image = self.image;
}
- (void)viewDidUnload
{
[super viewDidUnload];
[imageView release];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
If there's anything I can do to make this post more legible, please let me know. I'll add things that don't work/replicate the problem to the appropriate list. Thanks for taking the time to read this!
I just figured out the problem, had to do with excessive memory use. Thanks goes to this amazing post: https://stackoverflow.com/questions/1282830/uiimagepickercontroller-uiimage-memory-and-more Basically, before ever displaying the image, I divide each dimension by 4, resulting in a total 1/16th of the memory I was using before. Here's the method I used (as per the awesome post):
+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize;
{
UIGraphicsBeginImageContext(newSize);
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
In the method call, I pass in CGSizeMake(image.size.width/4, image.size.height/4)
Hope this was helpful!
I have an UIViewController with a table in it. Tapping a blue disclosure icon makes the view controller present a UINavigationController. This works fine and does make the navigation controller show up, but without a navigation bar, as below:
How would I go about making that magical Navbar showing up again? I really need it to present a map in the nav controller, and right now, that does not work.
EDIT: Here's the code I use to show it:
// scanned recently table view thing
- (void)tableView:(UITableView *)tableVieww didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableVieww deselectRowAtIndexPath:indexPath animated:YES];
if(indexPath.section == 0) {
NSString *info = [[scannedBackups objectAtIndex:indexPath.row] objectForKey:#"data"];
NSArray *items = [info componentsSeparatedByString:#"&"];
scanCodeViewCohntroller.dict = [[NSMutableDictionary alloc] init];
int o;
for (o = 0; o < [items count]; o++) {
NSArray *secondItems = [[items objectAtIndex:o] componentsSeparatedByString:#"="];
[scanCodeViewCohntroller.dict setObject:[secondItems objectAtIndex:1] forKey:[secondItems objectAtIndex:0]];
}
/*NSError *err;
scanCodeViewCohntroller.dict = [NSPropertyListSerialization propertyListWithData:[foo dataUsingEncoding:NSUnicodeStringEncoding] options:NSPropertyListMutableContainersAndLeaves format:kCFPropertyListXMLFormat_v1_0 error:&err];
if(err != nil) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Corrupted Data" message:[NSString stringWithFormat:#"Your Scanned Backup Data Store is corrupted. It will now be erased. %#", [err localizedDescription]] delegate:nil cancelButtonTitle:#"Dismiss" otherButtonTitles:nil];
[alert show];
[alert release];
scannedBackups = [[NSMutableArray alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName = [NSString stringWithFormat:#"%#/scannedCodes.plist", documentsDirectory];
[scannedBackups writeToFile:fullFileName atomically:NO];
[tableView reloadData];
}*/
[scanCodeViewCohntroller.dict setObject:[[scannedBackups objectAtIndex:indexPath.row] objectForKey:#"date"] forKey:#"date"];
[scanCodeViewCohntroller initalizeData];
[self presentModalViewController:scanCodeViewCohntroller animated:YES];
}
}
You need to get the navigation controller and invoke setNavigationBarHidden:animated:. So, try:
[detailController.navigationController setNavigationBarHidden:NO animated:NO];
Edit:
Based on your edit, I would suggest replacing the final line:
[self presentModalViewController:scanCodeViewCohntroller animated:YES];
with:
[self.navigationController pushViewController:scanCodeViewCohntroller animated:YES];
I'd like to first say I'm a little new to anything but tutorial examples, so sorry if this is a daft question.
I have modified some sample code ever so slightly so that instead of closing a UIImagePickerController once the user has picked an image it processes it in the background.
This seems to work quite well, but once the user has picked all of the images they want to process the only button they're presented with is "Cancel".
I was hoping to change the code so that it adds the selected image to a scrolling view at the bottom of the image picker, but can't find a way to stack or overlay anything onto the UIImagePickerController view.
The code I have so far is below:
-(IBAction)LoadPhotoAlbums:(id)sender
{
NSLog(#"LoadPhotoAlbums");
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
return;
}
if(photoPicker == NULL) {
photoPicker = [[UIImagePickerController alloc] init];
photoPicker.delegate = self;
photoPicker.allowsImageEditing = NO;
}
photoPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:photoPicker animated:YES];
[pool release];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
if([[info objectForKey:#"UIImagePickerControllerMediaType"] isEqualToString:K_UI_TYPE_IMAGE])
{
NSLog(#"Image Selected");
selectedImage = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"ddMMMyyyyHHmmss"];
NSString *date = [dateFormatter stringFromDate:[NSDate date]];
NSData *imageData = UIImageJPEGRepresentation(selectedImage,0.9);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
selectedImagePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.jpg", date]];
NSLog(#"Image path is %#", selectedImagePath);
if([imageData writeToFile:selectedImagePath atomically:YES])
NSLog(#"Write Successful");
}
//[picker dismissModalViewControllerAnimated:YES];
//add to listofimages view.
[self uploadSelectedImage];
}