import “headImageViewController.h”

@interface headImageViewController ()
@property (strong, nonatomic) IBOutlet UIImageView *photoImage;
@property (assign ,nonatomic)CGPoint startpoint;
@property (strong, nonatomic)IBOutlet UIImageView *imageView;
@property (strong, nonatomic)UIImage *selectImage;
@property (strong, nonatomic)IBOutlet UIButton *okbut;
@property (strong, nonatomic)IBOutlet UIButton *cancelbut;
@end

@implementation headImageViewController

(void)viewDidLoad {
[super viewDidLoad];
self.imageView.image = self.selectImage;

UIPinchGestureRecognizer *pinchGestureRecognizermiddle = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchView:)];

UIPanGestureRecognizer *panGestureRecognizermiddle = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panView:)];

self.photoImage.hidden=YES;
[self.okbut setTitle:NSLocalizedString(@”Select”, “”) forState:UIControlStateNormal];
[self.cancelbut setTitle:NSLocalizedString(@”Cancel”,”“) forState:UIControlStateNormal];

UIView *viewup = [[UIView alloc]initWithFrame:CGRectMake(0, 0, kDeviceWidth, ((kDeviceHeight - 49 -kDeviceWidth)/2))];
viewup.backgroundColor = [UIColor blackColor];
viewup.alpha = 0.4;
[self.view addSubview:viewup];

UIView *viewmiddle = [[UIView alloc]initWithFrame:CGRectMake(0, 0, kDeviceWidth, kDeviceHeight - 49)];
viewmiddle.backgroundColor = [UIColor clearColor];
[self.view addSubview:viewmiddle];
[viewmiddle addGestureRecognizer:pinchGestureRecognizermiddle];
[viewmiddle addGestureRecognizer:panGestureRecognizermiddle];

UIView *viewdown = [[UIView alloc]initWithFrame:CGRectMake(0, (kDeviceHeight - 49 -kDeviceWidth)/2 + kDeviceWidth + 2, kDeviceWidth, (kDeviceHeight - 49 - kDeviceWidth)/2 - 2)];
viewdown.backgroundColor = [UIColor blackColor];
viewdown.alpha = 0.4;
[self.view addSubview:viewdown];

UIView *leftline = [[UIView alloc]initWithFrame:CGRectMake(0, (kDeviceHeight - 49 - kDeviceWidth)/2, 2, kDeviceWidth)];
leftline.backgroundColor = [UIColor whiteColor];
[self.view addSubview:leftline];

UIView *upperline = [[UIView alloc]initWithFrame:CGRectMake(0, (kDeviceHeight - 49 - kDeviceWidth)/2, kDeviceWidth, 2)];
upperline.backgroundColor = [UIColor whiteColor];
[self.view addSubview:upperline];

UIView *rightline = [[UIView alloc]initWithFrame:CGRectMake(kDeviceWidth - 2, (kDeviceHeight - 49 -kDeviceWidth)/2, 2, kDeviceWidth)];
rightline.backgroundColor = [UIColor whiteColor];
[self.view addSubview:rightline];

UIView *lowerline = [[UIView alloc]initWithFrame:CGRectMake(0, (kDeviceHeight - 49 - kDeviceWidth)/2 + kDeviceWidth, kDeviceWidth, 2)];
lowerline.backgroundColor = [UIColor whiteColor];
[self.view addSubview:lowerline];

[viewmiddle bringSubviewToFront:self.view];
}

-(void)viewWillAppear:(BOOL)animated
{
[self performSelector:@selector(fitimageview) withObject:nil afterDelay:0.1];
}

// 处理拖拉手势
- (void) panView:(UIPanGestureRecognizer *)panGestureRecognizer
{
if (panGestureRecognizer.state == UIGestureRecognizerStateBegan || panGestureRecognizer.state == UIGestureRecognizerStateChanged) {
CGPoint translation = [panGestureRecognizer translationInView:self.imageView.superview];

    CGPoint point = CGPointMake(self.imageView.center.x + translation.x, self.imageView.center.y + translation.y);CGPoint point1 = CGPointMake(self.imageView.center.x  + translation.x - self.imageView.frame.size.width/2, self.imageView.center.y + translation.y - self.imageView.frame.size.height/2);CGPoint point2 = CGPointMake(self.imageView.center.x  + translation.x + self.imageView.frame.size.width/2, self.imageView.center.y + translation.y - self.imageView.frame.size.height/2);CGPoint point3 = CGPointMake(self.imageView.center.x  + translation.x + self.imageView.frame.size.width/2, self.imageView.center.y + translation.y + self.imageView.frame.size.height/2);CGPoint point4 = CGPointMake(self.imageView.center.x  + translation.x + self.imageView.frame.size.width/2, self.imageView.center.y + translation.y + self.imageView.frame.size.height/2);point2 = CGPointMake(0,(kDeviceHeight - 49 -kDeviceWidth)/2);point3 = CGPointMake(0,(kDeviceHeight - 49 -kDeviceWidth)/2 + kDeviceWidth);CGPoint lastpoint = [self movefitsize:point Firstpoint:point1 Lastpoint:point4 LimitFirstpoint:point2 LimitLastpoint:point3];if (!(point.x == lastpoint.x && point.y == lastpoint.y)) {[UIView animateWithDuration:0.2delay:0.0options: UIViewAnimationOptionCurveEaseInanimations:^{[self.imageView setCenter:point];}completion:^(BOOL finished){[UIView animateWithDuration:0.3delay:0.0options: UIViewAnimationOptionCurveEaseInanimations:^{[self.imageView setCenter:lastpoint];}completion:^(BOOL finished){}];}];}else{[self.imageView setCenter:lastpoint];}[panGestureRecognizer setTranslation:CGPointZero inView:self.imageView.superview];
}

}

-(void)fitimageview
{

self.imageView.frame = CGRectMake(0, (kDeviceHeight - 49 - (kDeviceWidth *self.imageView.image.size.height /(self.imageView.image.size.width*1.0)))/2 , kDeviceWidth, (kDeviceWidth *self.imageView.image.size.height /(self.imageView.image.size.width *1.0)) );
self.startpoint =CGPointMake(self.imageView.frame.size.width, self.imageView.frame.size.height);

}

-(CGPoint)movefitsize:(CGPoint)Originalpoint Firstpoint:(CGPoint)firstpoint Lastpoint:(CGPoint)lastpoint LimitFirstpoint:(CGPoint)limitfirstpoint LimitLastpoint:(CGPoint)limitlastpoint
{
CGPoint point =CGPointMake(Originalpoint.x, Originalpoint.y);

if (firstpoint.x <= 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y > limitlastpoint.y   ){point = CGPointMake(Originalpoint.x, Originalpoint.y);}else if (firstpoint.x > 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y > (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x - firstpoint.x, Originalpoint.y);}else if (firstpoint.x <= 0 && firstpoint.y > limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y > (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x , Originalpoint.y -(firstpoint.y - limitfirstpoint.y));}else if (firstpoint.x <= 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x < kDeviceWidth && lastpoint.y > (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x + kDeviceWidth - lastpoint.x , Originalpoint.y );}else if (firstpoint.x <= 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y < (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x  , Originalpoint.y + (limitlastpoint.y) - lastpoint.y );}else if (firstpoint.x > 0 && firstpoint.y > limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y > (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x - firstpoint.x, Originalpoint.y -(firstpoint.y - limitfirstpoint.y));}else if (firstpoint.x <= 0 && firstpoint.y > limitfirstpoint.y && lastpoint.x < kDeviceWidth && lastpoint.y > (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x + kDeviceWidth - lastpoint.x, Originalpoint.y -(firstpoint.y - limitfirstpoint.y));}else if (firstpoint.x <= 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x < kDeviceWidth && lastpoint.y < (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x + kDeviceWidth - lastpoint.x, Originalpoint.y + (limitlastpoint.y) - lastpoint.y);}else if (firstpoint.x > 0 && firstpoint.y <= limitfirstpoint.y && lastpoint.x > kDeviceWidth && lastpoint.y < (limitlastpoint.y)   ){point = CGPointMake(Originalpoint.x - firstpoint.x, Originalpoint.y + (limitlastpoint.y) - lastpoint.y);}else{
}
return point;

}

(IBAction)cancelbut:(UIButton *)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}

// 处理缩放手势
- (void) pinchView:(UIPinchGestureRecognizer *)pinchGestureRecognizer
{
if (pinchGestureRecognizer.state == UIGestureRecognizerStateBegan || pinchGestureRecognizer.state == UIGestureRecognizerStateChanged) {
self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinchGestureRecognizer.scale, pinchGestureRecognizer.scale);
pinchGestureRecognizer.scale = 1;

}
if (pinchGestureRecognizer.state == UIGestureRecognizerStateEnded&self.imageView.frame.size.width <kDeviceWidth) {[UIView animateWithDuration:0.2delay:0options: UIViewAnimationOptionCurveEaseInanimations:^{self.imageView.transform = CGAffineTransformScale(self.imageView.transform, kDeviceWidth/self.imageView.frame.size.width*1.1,  kDeviceWidth/self.imageView.frame.size.width*1.1);}completion:^(BOOL finished){[UIView animateWithDuration:0.2delay:0options: UIViewAnimationOptionCurveEaseInanimations:^{self.imageView.transform = CGAffineTransformScale(self.imageView.transform, kDeviceWidth/self.imageView.frame.size.width,  kDeviceWidth/self.imageView.frame.size.width);}completion:^(BOOL finished){}];}];
}

}

(IBAction)selectbut:(UIButton *)sender {
float offset =1.0;

offset = self.imageView.image.size.width/self.imageView.frame.size.width;

CGPoint point2 = CGPointMake(0,(kDeviceHeight - 49 -kDeviceWidth)/2);
CGPoint point3 = CGPointMake(kDeviceWidth,(kDeviceHeight - 49 -kDeviceWidth)/2 + kDeviceWidth);

CGPoint centerpoint = [self.imageView.layer convertPoint:point2 fromLayer:self.view.layer];

CGPoint centerpoint2 = [self.imageView.layer convertPoint:point3 fromLayer:self.view.layer];

centerpoint = CGPointMake(centerpoint.x *self.imageView.frame.size.width/ self.startpoint.x ,centerpoint.y *self.imageView.frame.size.height/ self.startpoint.y);

centerpoint2 = CGPointMake(centerpoint2.x *self.imageView.frame.size.width/ self.startpoint.x ,centerpoint2.y *self.imageView.frame.size.height/ self.startpoint.y);

if (centerpoint.x < 0.0) {
centerpoint = CGPointMake(0,centerpoint.y);
}
if (centerpoint.x > self.imageView.frame.size.width) {
centerpoint = CGPointMake(0,centerpoint.y);
}
if (centerpoint.y < 0.0) {
centerpoint = CGPointMake(centerpoint.x,0);
}
if (centerpoint.y > self.imageView.frame.size.height) {
centerpoint = CGPointMake(centerpoint.x,0);
}

if (centerpoint2.x < 0.0) {
centerpoint2 = CGPointMake(self.imageView.frame.size.width,centerpoint2.y);
}
if (centerpoint2.x > self.imageView.frame.size.width) {
centerpoint2 = CGPointMake(self.imageView.frame.size.width,centerpoint2.y);
}
if (centerpoint2.y < 0.0) {
centerpoint2 = CGPointMake(centerpoint2.x,self.imageView.frame.size.height);
}
if (centerpoint2.y > self.imageView.frame.size.height) {
centerpoint2 = CGPointMake(centerpoint2.x,self.imageView.frame.size.height);
}

CGPoint centerpoint3 = CGPointMake(((centerpoint.x + centerpoint2.x)/2.0)* offset, ((centerpoint.y + centerpoint2.y)/2.0)* offset );

float width = (centerpoint2.x - centerpoint.x)* offset ;
float hight = (centerpoint2.y - centerpoint.y)* offset ;

／／下面就是得到的图片
UIImage *image= [self getCutPartOfImage:self.imageView.image Width:width Hight:hight BeganPonit:centerpoint3];

}

-(UIImage )getCutPartOfImage:(UIImage )image Width:(float)width Hight:(float)hight BeganPonit:(CGPoint)point
{
@autoreleasepool {
Imageprocess *imageproc=[[Imageprocess alloc]init];
UIImage *newimage = [[UIImage alloc]init];
newimage = image;
CGSize size = CGSizeMake(width,hight);

    //get imageUIImage *imagemodel = [[UIImage alloc]init];

／／下面两个函数见我《图像之指定位置，指定大小切图》文章
(http://blog.csdn.net/f735614338/article/details/50776209)
newimage = [imageproc imageAlphaToWhite:image];
newimage =[imageproc CutPartOfImage:newimage mainimage:self.imageView.image offX:point.x - width/2.0 offY:point.y - hight/2.0 Size:size];
return newimage;
}
}

@end

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图像之超简单方式实现微信头像功能

import “headImageViewController.h”

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