typedef void(^ImageCropCompleteBlock)(UIImage *);
@interface YXTestController : UIViewController
@property (nonatomic, strong) UIImage * originalImage;
@property (nonatomic, copy) ImageCropCompleteBlock complete;
@end
#import "YXTestController.h"
@interface YXTestController ()
@property (nonatomic, strong) UIImageView * imageView;
@property (nonatomic, strong) UIView * maskView;
@property (nonatomic, assign) CGRect cutRect;
@property (nonatomic, assign) CGSize imageMinSize;
@property (nonatomic, assign) BOOL isWideImg;
@end
@implementation YXTestController {
CGFloat _viewWeidth;
CGFloat _viewHeight;
CGFloat _animationTime;
CGFloat _maxScale; // 图片最大放大倍数
CGFloat _cutWidth; // 裁剪宽高
CGFloat _cutBordWidth; // 裁剪边框宽度
CGFloat _cutCornerRadius; //裁剪边框圆角
UIColor *_cutBordColor; // 裁剪边框颜色
UIColor *_cutMaskColor; // 裁剪遮罩颜色
}
- (void)viewDidLoad {
[super viewDidLoad];
_cutCornerRadius = 6;
_cutBordWidth = 3;
_cutBordColor = [UIColor whiteColor];
_cutMaskColor = [[UIColor blackColor] colorWithAlphaComponent:0.7];
_maxScale = 5;
_animationTime = 0.3f;
_cutWidth = 300;
_viewWeidth = self.view.frame.size.width;
_viewHeight = self.view.frame.size.height;
self.view.backgroundColor = [UIColor blackColor];
[self setupImageView];
[self addGestureRecognizer];
[self addmaskView];
[self addSubBttons];
}
#pragma mark - setup ui
- (void)setupImageView{
_imageView = [[UIImageView alloc]initWithImage:self.originalImage];
[self.view addSubview:_imageView];
_imageView.center = self.view.center;
CGFloat weidthScale = _imageView.image.size.width / _viewWeidth;
CGFloat heightScale = _imageView.image.size.height / _viewHeight;
// 长宽按照比例显示
CGFloat imgMixW = _cutWidth;
CGFloat imgMixH = _cutWidth / (_imageView.image.size.width / _imageView.image.size.height);
_isWideImg = NO;
if (weidthScale > heightScale) {
imgMixW = _cutWidth / (_imageView.image.size.height / _imageView.image.size.width);
imgMixH = _cutWidth;
_isWideImg = YES;
}
_imageView.bounds = CGRectMake(0, 0, imgMixW, imgMixH);
_imageMinSize = CGSizeMake(imgMixW, imgMixH);
}
- (void)addGestureRecognizer {
UIPinchGestureRecognizer * pich = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pichGestureAction:)];
[self.view addGestureRecognizer:pich];
UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGestureAction:)];
[self.view addGestureRecognizer:pan];
}
- (void)addmaskView {
CGFloat maskX = (_viewWeidth - _cutWidth)/2.0;
CGFloat maskY = (_viewHeight - _cutWidth)/2.0;
CGRect maskRect = CGRectMake(maskX, maskY, _cutWidth, _cutWidth);
_cutRect = maskRect;
//描边
CAShapeLayer *borderLayer = [CAShapeLayer layer];
borderLayer.frame = self.view.bounds;
borderLayer.lineWidth = _cutBordWidth;
borderLayer.strokeColor = _cutBordColor.CGColor;
borderLayer.fillColor = [UIColor clearColor].CGColor;
UIBezierPath *bezierPath=[UIBezierPath bezierPathWithRoundedRect:maskRect
cornerRadius:_cutCornerRadius];
borderLayer.path = bezierPath.CGPath;
self.maskView = [UIView new];
self.maskView.backgroundColor = [UIColor clearColor];
self.maskView.frame = self.view.bounds;
[self.view addSubview:self.maskView];
[self.maskView.layer insertSublayer:borderLayer atIndex:0];
{//镂空
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = self.view.bounds;
maskLayer.fillColor = _cutMaskColor.CGColor;
UIBezierPath *bezierPath=[UIBezierPath bezierPathWithRect:self.view.bounds];
[bezierPath appendPath:[[UIBezierPath bezierPathWithRoundedRect:maskRect cornerRadius:_cutCornerRadius] bezierPathByReversingPath]];
maskLayer.path = bezierPath.CGPath;
[self.maskView.layer insertSublayer:maskLayer atIndex:0];
}
}
- (void)addSubBttons{
UIButton * cancleButton = [[UIButton alloc]init];
[self.view addSubview:cancleButton];
[cancleButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[cancleButton setTitle:@"取消" forState:UIControlStateNormal];
cancleButton.frame = CGRectMake(30, _viewHeight-60, 40, 40);
[cancleButton addTarget:self action:@selector(cancelBtnClick) forControlEvents:UIControlEventTouchUpInside];
UIButton * tureButton = [[UIButton alloc]init];
[self.view addSubview:tureButton];
[tureButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[tureButton setTitle:@"确定" forState:UIControlStateNormal];
tureButton.frame = CGRectMake(_viewWeidth -70, _viewHeight-60, 40, 40);
[tureButton addTarget:self action:@selector(sureBtnClick) forControlEvents:UIControlEventTouchUpInside];
}
#pragma mark - action
- (void)cancelBtnClick {
[self.navigationController popViewControllerAnimated:YES];
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)sureBtnClick {
UIGraphicsBeginImageContextWithOptions(CGSizeMake(_cutWidth, _cutWidth), YES, [UIScreen mainScreen].scale);
CGFloat imgX = _imageView.frame.origin.x-(_viewWeidth-_cutWidth)/2;
CGFloat imgY = _imageView.frame.origin.y - (_viewHeight-_cutWidth)/2;
CGFloat imgW = _imageView.frame.size.width;
CGFloat imgH = _imageView.frame.size.height;
[_imageView.image drawInRect:CGRectMake(imgX, imgY, imgW, imgH)];
UIImage * tempImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
if (self.complete) {
self.complete(tempImage);
}
[self.navigationController popViewControllerAnimated:YES];
[self dismissViewControllerAnimated:YES completion:nil];
}
// 手势
- (void)pichGestureAction:(UIPinchGestureRecognizer *)pinch{
if (pinch.state == UIGestureRecognizerStateBegan || pinch.state == UIGestureRecognizerStateChanged) {
CGFloat newWidth = _imageView.frame.size.width * pinch.scale;
CGFloat newHeight = _imageView.frame.size.height * pinch.scale;
_imageView.bounds = CGRectMake(0, 0, newWidth, newHeight);
pinch.scale = 1;
}else if(pinch.state == UIGestureRecognizerStateEnded){
[self autoScale];
[self autoTransLationUseRect:_imageView.frame];
}
}
- (void)panGestureAction:(UIPanGestureRecognizer *)pan{
if (pan.state == UIGestureRecognizerStateBegan || pan.state == UIGestureRecognizerStateChanged) {
CGPoint transLationPoint = [pan translationInView:self.view];
CGFloat newCentX = _imageView.center.x + transLationPoint.x;
CGFloat newCentY = _imageView.center.y + transLationPoint.y;
_imageView.center = CGPointMake(newCentX, newCentY);
[pan setTranslation:CGPointZero inView:self.view.superview];
}else if(pan.state == UIGestureRecognizerStateEnded){
[self autoTransLationUseRect:_imageView.frame];
}
}
// 移动处理
- (void)autoTransLationUseRect:(CGRect)imgFrame {
CGRect cutRect = self.cutRect;
// 水平方向
if (imgFrame.origin.x > cutRect.origin.x) { //左边
imgFrame.origin.x = cutRect.origin.x;
}
if (CGRectGetMaxX(imgFrame) <= CGRectGetMaxX(cutRect)) { //右边
imgFrame.origin.x = CGRectGetMaxX(cutRect) - imgFrame.size.width;
}
// 垂直方向
if (imgFrame.origin.y > cutRect.origin.y) {
imgFrame.origin.y = cutRect.origin.y;
}
if (CGRectGetMaxY(imgFrame) <= CGRectGetMaxY(cutRect)) {
imgFrame.origin.y = CGRectGetMaxY(cutRect) - imgFrame.size.height;
}
if (imgFrame.size.width < cutRect.size.width || imgFrame.size.height < cutRect.size.height) {
CGPoint center = CGPointMake(cutRect.origin.x+_cutWidth/2, cutRect.origin.y+_cutWidth/2);
[UIView animateWithDuration:_animationTime animations:^{
self.imageView.center = center;
}];
}else {
[UIView animateWithDuration:_animationTime animations:^{
self.imageView.frame = imgFrame;
}];
}
}
// 缩放处理,设置了边界。保证内容都在裁剪框里面
- (void)autoScale {
CGFloat scale = _imageView.frame.size.width / _cutWidth;
if (_isWideImg) {
scale = _imageView.frame.size.height / _cutWidth;
}
CGFloat imgW = _imageMinSize.width;
CGFloat imgH = _imageMinSize.height;
if (scale < 1) {
[UIView animateWithDuration:_animationTime animations:^{
self.imageView.bounds = CGRectMake(0, 0,imgW, imgH);
}];
}else if(scale > _maxScale){
imgW = imgW * _maxScale;
imgH = imgH * _maxScale;
[UIView animateWithDuration:_animationTime animations:^{
self.imageView.bounds = CGRectMake(0, 0,imgW, imgH);
}];
}
}
@end
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