Adding a UIImage from the UIImagePickerController to a UIButton - objective-c

I have a UIButton which the user clicks on to bring up a UIImagePickerController. Once this has processed, it returns an edited UIImage to a delegate handler, which then is supposed to populate the UIButton with the new image.
In practise, however, what happens is if the user selects an image from their library, it works fine. But if they take a picture using the camera and edit it, the image doesn't make it to the UIButton. However, if I put the same image into a UIImageView for test purposes, it shows up.
Moreover, this works fine in the Simulator, but doesn't work on the device. Is it some kind of memory issue? Here's my code:
- (IBAction)takePictureButtonTapped
{
UIActionSheet *popupQuery = [[UIActionSheet alloc]
initWithTitle:nil
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:#"Take a Photo", #"Upload from Library", nil];
popupQuery.actionSheetStyle = UIActionSheetStyleBlackOpaque;
[popupQuery showInView:self.view];
[popupQuery release];
}
- (void)actionSheet:(UIActionSheet *)actionSheet
clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSLog(#"actionSheet:clickedButtonAtIndex:%d", buttonIndex);
if(buttonIndex == 2)
{
// cancel
[imagePickerController release];
}
else
{
imagePickerController = [[[UIImagePickerController alloc] init] autorelease];
imagePickerController.delegate = self;
imagePickerController.allowsEditing = YES;
if (buttonIndex == 0)
{
// Take a photo
// Set up the image picker controller and add it to the view
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
}
else if (buttonIndex == 1)
{
// Upload from Library
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary] == NO)
imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}
[self presentModalViewController:imagePickerController animated:YES];
}
}
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)img
editingInfo:(NSDictionary *)editInfo
{
NSLog(#"imagePickerController::didFinishPickingImage:%#", img);
itemImage = img;
[itemImage retain];
[imageButton setBackgroundImage:itemImage forState:UIControlStateNormal];
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
}
I've tried setImage, setBackgroundImage, for ALL states, and none of them work. Yet if I put the same image into a UIImageView, it's fine.
Any ideas?

I discovered that the reason it wasn't working properly was because I was using didFinishPickingImage:editingInfo: which is DEPRECATED. I should've been using imagePickerController:didFinishPickingMediaWithInfo: instead. Now it's working perfectly!
For some reason XCode wasn't warning me of the deprecation.

Related

What iOS function is this image?

Just wondering if anybody could help me out identifying and creating an iOS option such as this (http://imgur.com/QSfYavr) when a user clicks on a button, it gives the option to use a camera or choose a picture from photo library. I have researched UIIMAGEPICKER however don't think that is what I am after.
I am using latest Xcode + developing for iOS 7 also.
Thanks.
You can use the following code:
// Set these delegates in the header file
<UIImagePickerControllerDelegate, UINavigationControllerDelegate,UIActionSheetDelegate>
// On Button Action
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:#"Select Face for Perform Dance step"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:#"Camera", #"Select from Library", nil];
actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
[actionSheet showInView:self.view];
// Action sheet delegate
#pragma mark -
#pragma mark UIActionSheetDelegate
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
int i = buttonIndex;
switch(i)
{
case 0:
{
UIImagePickerController * picker = [[[UIImagePickerController alloc] init] autorelease];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:picker animated:YES completion:^{}];
}
break;
case 1:
{
UIImagePickerController * picker = [[[UIImagePickerController alloc] init] autorelease];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:^{}];
}
default:
// Do Nothing.........
break;
}
}
At last handle camera and select from gallery actions:
#pragma mark -
#pragma - mark Selecting Image from Camera and Library
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
// Picking Image from Camera/ Library
[picker dismissViewControllerAnimated:YES completion:^{}];
self.selectedImage = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
if (!self.selectedImage)
{
return;
}
// Adjusting Image Orientation
NSData *data = UIImagePNGRepresentation(selectedImage);
UIImage *tmp = [UIImage imageWithData:data];
UIImage *fixed = [UIImage imageWithCGImage:tmp.CGImage
scale:selectedImage.scale
orientation:self.selectedImage.imageOrientation];
self.selectedImage = fixed;
}
This code will work on all iOS SDKs 5.x, 6.x, 7.x.
Enjoy. :)
Its UIActionSheet for iOS7, if you updating your app for iOS7 looks for all iOS versions prior to iOS7, here's one already made, you can check it, https://github.com/ianb821/IBActionSheet

UIModalViewController Hidden behind a UIViewController

I am working with a sliding menu, like you would see in the Facebook or Path app.
In the rear menu I am wanting to allow the user to add an image by using the camera or photo library.
The issue I am having is the main view controller, the one that I slide, is always on top.
The Action Sheet presents just fine, but the modal view controller is hidden partially by the main view controller.
Here's my picker code:
- (void)viewDidLoad
{
[super viewDidLoad];
_UIPicker = [[UIImagePickerController alloc] init];
_UIPicker.delegate = self;
}
- (IBAction)profilePicButtonTapped
{
UIActionSheet * actionSheet = [[UIActionSheet alloc] initWithTitle:#"Set Up Your Profile Picture" delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:nil otherButtonTitles:#"Camera", #"Photo Library", nil];
actionSheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
[actionSheet showInView:_rearTableView];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0)
{
_UIPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:_UIPicker animated:YES completion:nil];
}
else if (buttonIndex == 1)
{
_UIPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:_UIPicker animated:YES completion:nil];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:#"Error" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:nil];
[alert show];
}
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage * selectedImage = [info objectForKey:UIImagePickerControllerOriginalImage];
_profileImageView.image = selectedImage;
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:nil];
}
A quick way to solve it would be to hide the main ViewController when you present the picker and show it again once it's dismissed. Assuming you have a reference to the main ViewController, just set it's view.hidden property to YES.
Another way to handle it would be to present it from the main ViewController instead of the rear menu.

Segue not appearing after Image Picker

I am writing an iOS app where, in a view there is a button. Clicking on that button gets an action sheet which has options to pick image from camera or gallery. After the image is picked, it should be passed on to another view by manually calling a segue. The image picker appears and the prepare for segue code is executed, but the segue doesnt appear. There are no errors and I have checked all identifiers etc. Here is the code:
-(IBAction)showButtonClicked:(id)sender {
UIActionSheet *photoActionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:nil otherButtonTitles:#"Take Photo", #"Choose from Library", nil];
photoActionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
[photoActionSheet showInView:self.tabBarController.tabBar];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
switch (buttonIndex) {
case 0:
{
[self dismissModalViewControllerAnimated:YES];
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:picker animated:YES];
break;
}
case 1:
{
[self dismissModalViewControllerAnimated:YES];
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
break;
}
default:
break;
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"goToPhotoDetails"]){
FostoPhotoDetailsViewController *photoDetails = (FostoPhotoDetailsViewController *)segue.destinationViewController;
photoDetails.imageView.image = self.buttonImage1;
}
}
- (void) imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)image
editingInfo:(NSDictionary *)editingInfo
{
self.buttonImage1 = image;
//FostoPhotoDetailsViewController *photoDetails = [[FostoPhotoDetailsViewController alloc] init];
//photoDetails.imageView.image = image;
[self dismissModalViewControllerAnimated:NO];
NSLog(#"Test");
[self performSegueWithIdentifier:#"goToPhotoDetails" sender:self];
}
Sounds like you are executing a segue with style push without being inside a UINavigationController.
When you call performSegueWithIdentifier:sender: it first correctly calls prepareForSegue:sender: then it tries to retrieve the current navigation controller and push the destination controller doing something like
[self.navigationController pushViewController:destinationController animated:YES];
But since you are not inside a UINavigationController the property navigationController is set to nil, causing the above call to fail silently.
Either change the display style of your segue to something other than push (for instance modal) or embed you controller in a UINavigationController.

Xcode Unrecognized Selector Error

I've been having a ton of issues with this section of an app that I'm writing, I'm sure people here are getting sick of me so I'm going to try and solve all my questions in this post. I'm working on an app that behaves like a photo gallery, and I'm implementing the option to have the user delete photos from their gallery. To accomplish this, I decided to place an invisible button over each picture. When the user hits an "Edit" button, the hidden delete buttons over each picture become active. I'm using the same IBOutlet over each of the hidden buttons for simplicity, and I've tagged each button appropriately in Interface Builder. When the user taps the button over the picture, an alert view appears asking if they really want to delete it. If they click yes, I call removeObjectAtIndex and delete the image from the UI. But, when I click "Yes" in the alert view, I get an error from Xcode stating:
2012-04-04 11:26:40.484 AppName[608:f803] -[UIButton setImage:]: unrecognized selector sent to instance 0x6a922c0
2012-04-04 11:26:40.485 AppName[608:f803] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton setImage:]: unrecognized selector sent to instance 0x6a922c0'*
I've been trying to figure out what is causing this for a few hours now to no avail. I'm not setting the image of a UIButton anywhere in my code. I did in IB, but I simply set the buttons types to Custom so that they appear invisible. I will post my entire file below, I can't find any issues in my code, so any help is much appreciated! Thanks.
EDIT Here is the current version of the code:
- (IBAction)grabImage {
self.imgPicker = [[UIImagePickerController alloc] init];
self.imgPicker.delegate = self;
self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
_popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
[_popover presentPopoverFromRect:self.imageView.bounds inView:self.imageView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
else {
[self presentModalViewController:imgPicker animated:YES];
}
[self.imgPicker resignFirstResponder];
}
// Sets the image in the UIImageView
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
if (imageView.image == nil) {
imageView.image = img;
self.array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView2.image == nil) {
imageView2.image = img;
NSLog(#"The image is a %#", imageView);
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView3.image == nil) {
imageView3.image = img;
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView3.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView4.image == nil) {
imageView4.image = img;
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView4.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Photo Gallery", #"Photo Gallery");
self.tabBarItem.image = [UIImage imageNamed:#"42-photos.png"];
}
return self;
}
////start of saving////
- (void)applicationDidEnterBackground:(UIApplication*)application {
NSLog(#"Image on didenterbackground: %#", imageView);
self.array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView3.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView4.image)]];
[self.user setObject:self.array forKey:#"images"];
[user synchronize];
}
- (void)viewDidLoad
{
self.user = [NSUserDefaults standardUserDefaults];
NSLog(#"It is %#", self.user);
self.array = [[self.user objectForKey:#"images"]mutableCopy];
imageView.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:0]];
imageView2.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:1]];
imageView3.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:2]];
imageView4.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:3]];
UIApplication *app = [UIApplication sharedApplication];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(applicationDidEnterBackground:)
name:UIApplicationDidEnterBackgroundNotification
object:app];
backToGalleryButton.hidden = YES;
tapToDeleteLabel.hidden = YES;
deleteButton1.hidden = YES;
[super viewDidLoad];
}
///// shows the hidden and invisible "delete" button over each photo.
- (IBAction)editButtonPressed:(id)sender {
grabButton.hidden = YES;
editButton.hidden = YES;
backToGalleryButton.hidden = NO;
tapToDeleteLabel.hidden = NO;
deleteButton1.hidden = NO;
}
////
// This is when the user taps on the image to delete it.
- (IBAction)deleteButtonPressed:(id)sender {
NSLog(#"Sender is %#", sender);
UIAlertView *deleteAlertView = [[UIAlertView alloc] initWithTitle:#"Delete"
message:#"Are you sure you want to delete this photo?"
delegate:self
cancelButtonTitle:#"No"
otherButtonTitles:#"Yes", nil];
[deleteAlertView show];
int imageIndex = ((UIButton *)sender).tag;
deleteAlertView.tag = imageIndex;
}
- (void)alertView: (UIAlertView *) alertView
clickedButtonAtIndex: (NSInteger) buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex]) {
NSLog(#"User Clicked Yes. Deleting index %d of %d", alertView.tag, [array count]);
NSLog(#"The tag is %i", alertView.tag);
[self.array removeObjectAtIndex: alertView.tag];
NSLog(#"After deleting item, array count = %d", [array count]);
NSLog(#"Returned view is :%#, in view: %#", [self.view viewWithTag:alertView.tag], self.view);
((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
}
[self.user setObject:self.array forKey:#"images"];
}
Update: I added breakpoints, and discovered that ((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil; is the line that is causing the crash, I still can't figure out why though.
I don't see setImage: being called in any of that code you pasted into your question, but I can tell you this: UIButton's setImage method actually requires a button state as a second parameter.
e.g.
[UIButton setImage: forState:]
I've linked Apple's documentation for you.
If your calls to setImage: don't have a second parameter, that would explain the "unrecognized selector error" you're seeing.
This is an extension to #MichaelDautermann , who makes a very good point that a UIButton has a setImage:forState: method, but no setImage method. However, you ARE calling set image. Not on a button, but when you say imageView.image and imageView2.image. This invokes the setter method for the image view. I would set a breakpoint (or use NSLog and the %# item) to ensure that imageView is in fact an imageView and not a button. If it somehow changed from under you, this could be causing the issue. Simply set a break point at those two lines and see if you even make it past them.
Additionally, if Xcode isn't popping you over to which line is actually causing the issue, check your crash logs. Symbolicated, the log will give you the line number. Or, a less direct approach would be to set breakpoints at the ends of the methods you provided in your answer, and see how many you get past. Once you crash, you can narrow down which method is causing you grief, and then start setting break points within the method until you get to the line in question.
UPDATE:
You said in the comments that ((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil is what you have, but self.view is a UIControl. Changing the cast won't affect the result. Is the UIImageView whose image you are trying to delete a subview of a UIControl? If not, you're never going to get the image view back from viewWithTag. Generally, self.view refers to a view controller's view, so if you're getting a UIControl, my assumption is either your whole view is a UIControl, or you're doing this in the wrong class. Which class are you doing this in, and what is it a subclass of? It appears you are doing this in a view controller, but I just want to be sure. And again, in either case (UIControl or UIImageView), neither class responds to setImage.

How can i add a UIImagePickerController controller to my ipad based application to show multiple images?

i am using uiimage picker control in ipad based application.so i am displaying it using the following code:
[self presentModalViewController:myImagePicker animated:YES];
but there is a error that shows
'On iPad, UIImagePickerController must be presented via UIPopoverController'
how can i add a UIImagePickerController controller to my ipad based application to show multiple images.can any one provide me a good way to do it.
Do like this.When you click on a button in button action call this.
UIActionSheet *photoActionSheet = [[UIActionSheet alloc] initWithTitle:#"" delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:nil otherButtonTitles:#"Take Photo", #"Choose Existing",nil];
[photoActionSheet showFromRect:CGRectMake(315, 355, 10, 10) inView:self.view animated:YES];
#pragma mark UIActionSheetDelegate methods
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
imgPicker.delegate = self;
if(buttonIndex == 0){
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:imgPicker animated:YES];
}
else if(buttonIndex == 1){
imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:imgPicker animated:YES];
}
}