import <UIKit/UIKit.h>
@interface ImagHandlerView : UIView
@property(nonatomic,strong) void(^handleCompletionBlock)(UIImage* imge);
@end
import "ImagHandlerView.h"
@interface ImagHandlerView ()<UIGestureRecognizerDelegate>
@property(strong,nonatomic)UIImageView * imageView;
@end
@implementation ImagHandlerView
-(instancetype)initWithFrame:(CGRect)frame{
if (self = [super initWithFrame:frame]) {
self.imageView = [[UIImageView alloc]initWithFrame:self.bounds];
_imageView.userInteractionEnabled = YES;
_imageView.backgroundColor = [UIColor orangeColor];
[self addSubview:_imageView];
self.backgroundColor = [UIColor clearColor];
[self setUpGestureRecognizer];
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
-(void)setUpGestureRecognizer{
/拖动/
UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
[self.imageView addGestureRecognizer:pan];
/**
旋转
*/
UIRotationGestureRecognizer * rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
[self.imageView addGestureRecognizer:rotation];
rotation.delegate = self;
/**
缩放
*/
UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
[self.imageView addGestureRecognizer:pinch];
pinch.delegate = self;
//长按
UILongPressGestureRecognizer * longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
[self.imageView addGestureRecognizer:longPress];
}
-(void)pan:(UIPanGestureRecognizer*)pan{
//获取手指偏移量
CGPoint transP= [pan translationInView:self.imageView];
self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, transP.x, transP.y);
[pan setTranslation:CGPointZero inView:self.imageView];
}
-(void)rotation:(UIRotationGestureRecognizer*)rotation{
self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotation.rotation);
rotation.rotation = 0;
}
-(void)pinch:(UIPinchGestureRecognizer)pinch{
self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale) ;
pinch.scale = 1;
}
-(void)longPress:(UILongPressGestureRecognizer)longPress{
／／ 这里要注意 长安的状态 有开始。改变。和结束
if (longPress.state == UIGestureRecognizerStateBegan) {
[UIView animateWithDuration:0.25 animations:^{
self.imageView.alpha = 0;
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.25 animations:^{
self.imageView.alpha= 1.0;
} completion:^(BOOL finished) {
// 获取图片
UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 0);
CGContextRef ref = UIGraphicsGetCurrentContext();
[self.layer renderInContext:ref];
UIImage *imge = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.handleCompletionBlock(imge);
[self removeFromSuperview];
}];
}];
}
}
pragma mark 代理方法
// 实现这个地理方法这样的话 可用同时响应多个手势
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(nonnull UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
@end
