iOS图片合成————（拍照换发）

一个简单的换发小程序，可以实现拍照，移动发型，放大缩小发型。

如图：

.h中实现：

#import <UIKit/UIKit.h>@interface ChangeHairVC : UIViewController<UINavigationControllerDelegate,UIActionSheetDelegate,UIImagePickerControllerDelegate,UIGestureRecognizerDelegate>
@property (strong, nonatomic) IBOutlet UIView *photoView;
@property (weak, nonatomic) IBOutlet UIImageView *personImage;
@property (weak, nonatomic) IBOutlet UIImageView *hairImage;//合并图片
- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2;@end

.m中实现：

#define IsIOS7 ([[[[UIDevice currentDevice] systemVersion] substringToIndex:1] intValue]>=7)
#define IsIPHONE4 ([[UIScreen mainScreen] bounds].size.height < 500)#import "ChangeHairVC.h"@interface ChangeHairVC ()@end@implementation ChangeHairVC {CGSize imageSize;//图片的宽高CGPoint imagePoint;//图片的位置CGPoint startLocation;//移动起始位置CGPoint endLocation;//移动终止位置CGFloat lastScale;}- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self;
}- (void)viewDidLoad
{[super viewDidLoad];// Do any additional setup after loading the view from its nib.self.view.backgroundColor = [UIColor colorWithRed:234/255.0 green:244/255.0 blue:235/255.0 alpha:1];self.photoView.frame = CGRectMake(0, (IsIOS7?20:0)-90, 320, 90);[self.view addSubview:self.photoView];self.personImage.clipsToBounds = YES;self.hairImage.clipsToBounds = YES;[self.hairImage setImage:[UIImage imageNamed:@"jiafa.png"]];//限定显示比例double n = 320/self.personImage.image.size.width;double m = 280/self.hairImage.image.size.width;self.personImage.frame = CGRectMake(0, 44+(IsIOS7?20:0), 320, self.personImage.image.size.height*n);self.hairImage.frame = CGRectMake(20, 64+(IsIOS7?20:0), 280, self.hairImage.image.size.height*m);imageSize.width = self.hairImage.frame.size.width;imageSize.height = self.hairImage.frame.size.height;imagePoint.x = self.hairImage.frame.origin.x;imagePoint.y = self.hairImage.frame.origin.y;//移动发型图片UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGestures:)];panGestureRecognizer.minimumNumberOfTouches = 1;panGestureRecognizer.maximumNumberOfTouches = 1;[self.hairImage addGestureRecognizer:panGestureRecognizer];//放大缩小发型图片UIPinchGestureRecognizer *zoomRecognizer = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(zoomGesture:)];[zoomRecognizer setDelegate:self];[self.hairImage addGestureRecognizer:zoomRecognizer];}
//合成图片按钮
- (IBAction)mixImage:(id)sender {[self addImage:self.personImage.image toImage:self.hairImage.image];
}//合并图片
- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2{//设置合成后图片的大小UIGraphicsBeginImageContext(self.personImage.frame.size);[image1 drawInRect:CGRectMake(self.personImage.frame.origin.x, 0, self.personImage.frame.size.width, self.personImage.frame.size.height)];[image2 drawInRect:CGRectMake(self.hairImage.frame.origin.x, 19, self.hairImage.frame.size.width, self.hairImage.frame.size.height)];UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();self.hairImage.hidden = YES;//resultingImage即为合成之后的图片self.personImage.image = resultingImage;return resultingImage;}//放大缩小
-(void)zoomGesture:(UIPinchGestureRecognizer *)sender {//当手指离开屏幕时,将lastscale设置为1.0if(sender.state == UIGestureRecognizerStateEnded) {lastScale = 1.0;return;}if (self.hairImage.frame.origin.x > 0 || self.hairImage.frame.origin.x < [UIScreen mainScreen].bounds.size.width) {CGFloat scale = 1.0 - (lastScale - sender.scale);CGAffineTransform currentTransform = sender.view.transform;CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale);[sender.view setTransform:newTransform];lastScale = sender.scale;imageSize.width = self.hairImage.frame.size.width;imageSize.height = self.hairImage.frame.size.height;imagePoint.x = self.hairImage.frame.origin.x;imagePoint.y = self.hairImage.frame.origin.y;}}
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]];
}
//移动图片
- (void) handlePanGestures:(UIPanGestureRecognizer*)paramSender{//图片宽高比double m = self.hairImage.frame.size.width/self.hairImage.image.size.width;if (paramSender.state == UIGestureRecognizerStateBegan){//通过使用 locationInView 这个方法,来获取到手势的坐标CGPoint location = [paramSender locationInView:paramSender.view.superview];//记录图片初始位置startLocation.x = location.x;startLocation.y = location.y;}if (paramSender.state == UIGestureRecognizerStateChanged) {CGPoint location = [paramSender locationInView:paramSender.view.superview];//记录图片终止位置endLocation.x = location.x;endLocation.y = location.y;double changeX = endLocation.x - startLocation.x;double changeY = endLocation.y - startLocation.y;//更改图片位置self.hairImage.frame = CGRectMake(imagePoint.x + changeX,  imagePoint.y + changeY,  self.hairImage.frame.size.width, self.hairImage.image.size.height*m);}}
//获取照片
#pragma mark photo
- (IBAction)takePhotoClick:(UIButton *)sender {[UIView animateWithDuration:0.3 animations:^{self.photoView.frame = CGRectMake(0, (IsIOS7?20:0), 320, 90);}completion:^(BOOL finished) {}];
}- (IBAction)photoBtnClick:(UIButton *)sender {if (sender.tag == 1) {[UIView animateWithDuration:0.3 animations:^{self.photoView.frame = CGRectMake(0, (IsIOS7?20:0)-90, 320, 90);self.hairImage.hidden = NO;}completion:^(BOOL finished) {}];if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化picker.delegate = self;picker.allowsEditing = YES;//设置可编辑picker.sourceType = sourceType;//创建叠加层UIView *overLayView=[[UIView alloc]initWithFrame:CGRectMake(0, 120, 320, 254)];//取景器的背景图片，该图片中间挖掉了一块变成透明，用来显示摄像头获取的图片；UIImage *overLayImag=[UIImage imageNamed:@"zhaoxiangdingwei.png"];UIImageView *bgImageView=[[UIImageView alloc]initWithImage:overLayImag];[overLayView addSubview:bgImageView];picker.cameraOverlayView=overLayView;picker.cameraDevice=UIImagePickerControllerCameraDeviceFront;[self presentViewController:picker animated:YES completion:^{}];}else {NSLog(@"无相机");}}else if (sender.tag == 2) {[UIView animateWithDuration:0.3 animations:^{self.photoView.frame = CGRectMake(0, (IsIOS7?20:0)-90, 320, 90);self.hairImage.hidden = NO;}completion:^(BOOL finished) {}];UIImagePickerController *pickerImage = [[UIImagePickerController alloc] init];if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {pickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;pickerImage.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:pickerImage.sourceType];}pickerImage.delegate = self;pickerImage.allowsEditing = NO;[self presentViewController:pickerImage animated:YES completion:^{}];}else if (sender.tag == 3) {[UIView animateWithDuration:0.3 animations:^{self.photoView.frame = CGRectMake(0, (IsIOS7?20:0)-90, 320, 90);}completion:^(BOOL finished) {}];}
}//从相册选择图片后操作
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {[picker dismissViewControllerAnimated:YES completion:^{}];//NSLog(@"%@",info);UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];[self saveImage:image withName:@"currentImage.png"];}- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {[picker dismissViewControllerAnimated:YES completion:^{}];
}#pragma mark - 保存图片至沙盒
- (void) saveImage:(UIImage *)currentImage withName:(NSString *)imageName
{NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);// 获取沙盒目录NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];// 将图片写入文件[imageData writeToFile:fullPath atomically:NO];NSLog(@"%@",fullPath);[self.personImage setImage:[UIImage imageWithContentsOfFile:fullPath] ];double n = 320/self.personImage.image.size.width;self.personImage.frame = CGRectMake(0, 44+(IsIOS7?20:0), 320, self.personImage.image.size.height*n);//将图片保存到disk//UIImageWriteToSavedPhotosAlbum(currentImage, nil, nil, nil);
}- (void)viewWillAppear:(BOOL)animated
{[super viewWillAppear:animated];}
- (void)didReceiveMemoryWarning
{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}@end

完整DEMO下载地址：http://download.csdn.net/detail/u011918080/6975279

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