如何自定义uiimagepickercontroller

　　1.设定imagePacker参数
　　// Transform values for full screen support:
　　#define CAMERA_TRANSFORM_X 1
　　// this works for iOS 4.x
　　#define CAMERA_TRANSFORM_Y 1.24299

　　-(void)viewWillAppear:(BOOL)animated{
　　
　　UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
　　imagePickerController.delegate = self;

　　imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
　　imagePickerController.showsCameraControls = NO;
　　imagePickerController.navigationBarHidden = YES;
　　imagePickerController.wantsFullScreenLayout = YES;
　　imagePickerController.cameraViewTransform =CGAffineTransformScale(imagePickerController.cameraViewTransform, CAMERA_TRANSFORM_X,CAMERA_TRANSFORM_Y);
　　cameraViewController = [[CameraOverlayViewControlleralloc]initWithNibName:@"CameraOverlayViewController" bundle:nil];
　　imagePickerController.cameraOverlayView = cameraViewController.view;
　　cameraViewController.pickerController = imagePickerController;
　　[self presentModalViewController:imagePickerController animated:NO];
　　[imagePickerController release];
　　}

　　2.代理方法

　　-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
　　[picker dismissModalViewControllerAnimated:NO];
　　UIImage* image = [info valueForKey:UIImagePickerControllerOriginalImage];
　　BeautifyPhotoViewController* beautifyPhotoViewController = [[BeautifyPhotoViewControlleralloc]initWithNibName:@"BeautifyPhotoViewController" bundle:nil];
　　beautifyPhotoViewController.photoImage = image;
　　[self.navigationController pushViewController:beautifyPhotoViewController animated:YES];
　　[beautifyPhotoViewController release];
　　}

　　3.overlayView对应的controller

　　#import "CameraOverlayViewController.h"

　　@interface CameraOverlayViewController ()

　　@end

　　@implementation CameraOverlayViewController

　　@synthesize pickerController;
　　@synthesize cameraScaleBtn;
　　@synthesize titleImageView;
　　@synthesize flashModeBtn;
　　@synthesize deviceModeBtn;
　　@synthesize photoBtn;

　　- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
　　{
　　self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
　　if (self) {
　　// Custom initialization
　　[self getAllPhotoImages];
　　}
　　return self;
　　}

　　- (void)viewDidLoad
　　{
　　[super viewDidLoad];
　　isOneToOne = YES;
　　imageArray = [[NSMutableArray alloc]init];
　　shadowView = [[ShadowView alloc]initWithRect:CGRectMake(0, 80, 320, 320)];
　　[self.view addSubview:shadowView];
　　[self.view sendSubviewToBack:shadowView];
　　[shadowView release];
　　// Do any additional setup after loading the view from its nib.
　　}

　　- (void)viewDidUnload
　　{
　　[super viewDidUnload];
　　// Release any retained subviews of the main view.
　　// e.g. self.myOutlet = nil;
　　}
　　//闪光灯
　　-(IBAction)cameraTorchOn:(id)sender{
　　if (pickerController.cameraFlashMode ==UIImagePickerControllerCameraFlashModeAuto) {
　　pickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
　　}else {
　　pickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;
　　}
　　}

　　//前后摄像头
　　- (IBAction)swapFrontAndBackCameras:(id)sender {
　　if (pickerController.cameraDevice ==UIImagePickerControllerCameraDeviceRear ) {
　　pickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
　　}else {
　　pickerController.cameraDevice = UIImagePickerControllerCameraDeviceRear;
　　}
　　}
　　//改变拍摄比例
　　-(IBAction)changeCameraScale:(id)sender{
　　if (isOneToOne) {
　　[shadowView changeRect:CGRectMake(0, 0, 320, 428)];
　　[cameraScaleBtn setImage:[UIImage imageNamed:@"font_-scale43.png"]forState:UIControlStateNormal];
　　titleImageView.alpha = 0.2;
　　flashModeBtn.alpha = 0.5;
　　deviceModeBtn.alpha = 0.5;
　　isOneToOne = NO;
　　}else {
　　[shadowView changeRect:CGRectMake(0, 80, 320, 320)];
　　[cameraScaleBtn setImage:[UIImage imageNamed:@"font_-scale11.png"]forState:UIControlStateNormal];
　　titleImageView.alpha = 1;
　　flashModeBtn.alpha = 1;
　　deviceModeBtn.alpha = 1;
　　isOneToOne = YES;
　　}
　　}

　　- (IBAction)enterPhotoAlbum:(id)sender {
　　PhotoAlbumViewController* photoAlbumViewController = [[PhotoAlbumViewControlleralloc]initWithNibName:@"PhotoAlbumViewController" bundle:nil];
　　[self presentModalViewController:photoAlbumViewController animated:YES];
　　
　　}

　　//拍摄照片
　　-(IBAction)takeThePic:(id)sender{
　　[pickerController takePicture];
　　}

　　-(IBAction)backToHome:(id)sender{
　　[pickerController dismissModalViewControllerAnimated:NO];
　　[[NSNotificationCenter defaultCenter] postNotificationName:@"backToHome" object:nil];
　　}

　　- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
　　{
　　return (interfaceOrientation == UIInterfaceOrientationPortrait);
　　}

　　- (void)dealloc
　　{
　　[cameraScaleBtn release];
　　[flashModeBtn release];
　　[deviceModeBtn release];
　　[titleImageView release];
　　[super dealloc];
　　}

　　-(void)getAllPhotoImages{
　　ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){
　　
　　NSLog(@"error occour =%@", [myerror localizedDescription]);
　　};
　　ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index,BOOL *stop){
　　if (result!=NULL) {
　　if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
　　[imageArray addObject:result];
　　UIImage *img=[UIImage imageWithCGImage:result.thumbnail];
　　[photoBtn setImage:img forState:UIControlStateNormal];
　　}
　　}
　　};
　　ALAssetsLibraryGroupsEnumerationResultsBlock
　　
　　libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){
　　
　　if (group == nil) {
　　return;
　　}
　　if (group!=nil) {
　　[group enumerateAssetsUsingBlock:groupEnumerAtion];
　　}
　　};
　　ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
　　
　　[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
　　
　　usingBlock:libraryGroupsEnumeration
　　
　　failureBlock:failureblock];
　　[library release];
　　}
　　@end本回答被提问者采纳