Here is my note about UIImagePickerController and a simple example.
Three ways to pick image
//Pick from Camera imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; //Pick from all folders in the gallery imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //Pick from PhotosAlbum(camera roll) imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
Check camera's existence
//Check Camera available or not if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) //Check PhotoLibrary available or not if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) //Check front Camera available or not if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront])
UIImagePickerControllerDelegate protocol
//Tells the delegate that the user picked a still image or movie. (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { } //Tells the delegate that the user cancelled the pick operation. - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { } //Tells the delegate that the user picked an image. (Deprecated in iOS 3.0. Use imagePickerController:didFinishPickingMediaWithInfo: instead.) - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo { }
A simple basic camera code example:
(UIKit,Foundation,CoreGraphics)
ViewController.h
#import <UIKit/UIKit.h> @interface ViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate> @property(nonatomic,retain)IBOutlet UIImageView *imageView; @property(nonatomic,retain)IBOutlet UIBarButtonItem *saveImageBotton; -(IBAction)showCameraAction:(id)sender; -(IBAction)saveImageAction:(id)sender; @endProtocol UIImagePickerController and UINavigationController.
UIImagePickerController is a subclass of the UINavigationController.
UIImageView can't show video,need to use MPMoviePlayer instance(Property view).
ViewController.m
#import "ViewController.h" @implementation ViewController @synthesize imageView; @synthesize saveImageBotton; #pragma mark - Show camera -(IBAction)showCameraAction:(id)sender { UIImagePickerController *imagePickController=[[UIImagePickerController alloc]init]; imagePickController.sourceType=UIImagePickerControllerSourceTypeCamera; imagePickController.delegate=self; imagePickController.allowsEditing=TRUE; [self presentModalViewController:imagePickController animated:YES]; [imagePickController release]; } #pragma mark - Save photo -(IBAction)saveImageAction:(id)sender { UIImage *image=imageView.image; UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); saveImageBotton.enabled=FALSE; } #pragma mark - When finish shoot -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *image=[info objectForKey:UIImagePickerControllerEditedImage]; imageView.image=image; saveImageBotton.enabled=TRUE; [self dismissModalViewControllerAnimated:YES]; } #pragma mark - Release object - (void)dealloc { [imageView release]; [saveImageBotton release]; [super dealloc]; } #pragma mark - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } #pragma mark - View lifecycle - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } @end
PS1:
According to the following,you can set imageView Mode
imageView.contentMode = UIViewContentModeScaleAspectFit;
you can set it to any of the following
UIViewContentModeScaleToFill,
UIViewContentModeScaleAspectFit,
UIViewContentModeScaleAspectFill,
UIViewContentModeRedraw,
UIViewContentModeCenter,
UIViewContentModeTop,
UIViewContentModeBottom,
UIViewContentModeLeft,
UIViewContentModeRight,
UIViewContentModeTopLeft,
UIViewContentModeTopRight,
UIViewContentModeBottomLeft,
UIViewContentModeBottomRight
PS2:
[Other Properties]
cameraCaptureMode
--->UIImagePickerControllerCameraCaptureModePhoto(Default) or UIImagePickerControllerCameraCaptureModeVideo
cameraDevice
--->UIImagePickerControllerCameraDeviceFront or UIImagePickerControllerCameraDeviceRear(Default)
cameraFlashMode
--->Close:UIImagePickerControllerCameraFlashModeOff = -1
--->Auto:UIImagePickerControllerCameraFlashModeAuto = 0 (Default)
--->Open:UIImagePickerControllerCameraFlashModeOn = 1
cameraOverlayView
--->about Customized
Excellent post! Thanks!
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DeleteHi Hanpo do i have to create a Xib file and wire up the actions and iboutlets?
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