UIPinchGestureRecognizer 缩放，移动，旋转,UIImagePickerController 横屏，全屏 的实现

@interface PhotographViewController : UIViewController <UIImagePickerControllerDelegate,UIGestureRecognizerDelegate> {
UIImagePickerController *imagePicker;
UIImage *photoImage;
UIView *overlay;
UIImageView *photoCar;
UIView *viewPhoth;

CGFloat lastScale ;
UIImageView  *outPhotoImage;
}
@property (nonatomic,retain) IBOutlet UIImagePickerController *imagePicker;
@property (nonatomic,retain) IBOutlet UIView *overlay;
@property (nonatomic,retain) IBOutlet UIImageView  *outPhotoImage;
@property (nonatomic,retain) IBOutlet UIImageView *photoCar;
@property (nonatomic,retain) IBOutlet   UIView *viewPhoth;
-(void)performAction:(id)sender;
-(IBAction)returnView;
-(IBAction)photographAction;
-(IBAction)photographActionImage;

-(void)scale:(UIPinchGestureRecognizer *)sender;
- (void)rotatePiece:(UIRotationGestureRecognizer *)gestureRecognizer;
- (void)panPiece:(UIPanGestureRecognizer *)gestureRecognizer;
@end

UIGestureRecognizerDelegate

//
//  PhotographViewController.m
//  test1
//
//  Created by Mica001 on 11-8-30.
//  Copyright 2011年 __MyCompanyName__. All rights reserved.
//

#import "PhotographViewController.h"

@implementation PhotographViewController
@synthesize imagePicker;
@synthesize overlay;
@synthesize outPhotoImage;
@synthesize photoCar;
@synthesize viewPhoth;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}

- (void)dealloc
{
[viewPhoth release];
[photoCar release];
[outPhotoImage release];
[overlay release];
[imagePicker release];
[super dealloc];
}

-(IBAction)returnView
{
[self dismissModalViewControllerAnimated:YES] ;
}

-(IBAction)photographAction
{
self.imagePicker.sourceType= UIImagePickerControllerSourceTypeCamera;
self.imagePicker.showsCameraControls = NO;
self.imagePicker.cameraOverlayView=self.overlay;
//这里放大，把工具栏隐藏，  在//overlay  里手工添加一些控制button  当这，这里要用imageview 模拟成button
imagePicker.cameraViewTransform = cameraTransform;
[self presentModalViewController:imagePicker animated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{

NSLog(@"image");
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
{
photoImage=[info objectForKey:@"UIImagePickerControllerOriginalImage"];
outPhotoImage.image=photoImage;
[picker dismissModalViewControllerAnimated:YES];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;
{
NSLog(@"s");
}

- (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];
lastScale=1.0;
UIImage *image1=[UIImage imageNamed:@"dzlogo.png"];
UIImageView *imageViewCarS1= [[UIImageView alloc] initWithImage:image1];
imageViewCarS1.frame=CGRectMake(0, 0, imageViewCarS1.frame.size.width * 0.4, imageViewCarS1.frame.size.height * 0.4)   ;
[imageViewCarS1 setTag:11];
self.navigationItem.titleView=imageViewCarS1 ;
[imageViewCarS1 release];

self.navigationItem.rightBarButtonItem=[[[UIBarButtonItem alloc] initWithTitle:@"选项" style:UIBarButtonItemStylePlain target:self action:@selector(performAction:)] autorelease];

// 放大缩小手势
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc]

initWithTarget:self action:@selector(scale:)];
[pinchRecognizer setDelegate:self];
[self.overlay addGestureRecognizer:pinchRecognizer];
[pinchRecognizer release];

// 旋转手势
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotatePiece:)];
[self.viewPhoth addGestureRecognizer:rotationGesture];
[rotationGesture release];

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panPiece:)];

[panGesture setMaximumNumberOfTouches:1];

[panGesture setDelegate:self];

[viewPhoth addGestureRecognizer:panGesture];

[panGesture release];

}

-(void)scale:(UIPinchGestureRecognizer*)sender {

//当手指离开屏幕时,将lastscale设置为1.0
if([sender state] == UIGestureRecognizerStateEnded) {
lastScale = 1.0;
return;
}

CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]);
CGAffineTransform currentTransform = self.photoCar.transform;
CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale);

[self.photoCar setTransform:newTransform];
lastScale = [sender scale];

}

- (void)rotatePiece:(UIRotationGestureRecognizer *)gestureRecognizer
{

if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {
[gestureRecognizer view].transform = CGAffineTransformRotate([[gestureRecognizer view] transform], [gestureRecognizer rotation]);
// rotate = [gestureRecognizer rotation];
[gestureRecognizer setRotation:0];
}
}

- (void)panPiece:(UIPanGestureRecognizer *)gestureRecognizer

{

UIView *piece = [gestureRecognizer view];

if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {

CGPoint translation = [gestureRecognizer translationInView:[piece superview]];

[piece setCenter:CGPointMake([piece center].x + translation.x, [piece center].y + translation.y)];

[gestureRecognizer setTranslation:CGPointZero inView:[piece superview]];

}

}

- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft)
||(interfaceOrientation == UIInterfaceOrientationLandscapeRight));
}

-(void)performAction:(id)sender;
{

}

-(IBAction)photographActionImage
{
[self.imagePicker takePicture];
}
@end