关于手势-平移 旋转 缩放

  //平移

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

    [myView addGestureRecognizer:pan];

    //缩放

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

    [myView addGestureRecognizer:pinch];

    //旋转

    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];

    [myView addGestureRecognizer:rotation];

    

}

 

//旋转

- (void)rotation:(UIRotationGestureRecognizer *)traget {

    UIView *myView = traget.view;

    myView.transform = CGAffineTransformMakeRotation(traget.rotation);

}

 

//平移

- (void)pan:(UIPanGestureRecognizer *)traget {

    UIView *myView = traget.view;

    CGPoint point = [traget translationInView:self.view];

    myView.center = CGPointMake(myView.center.x + point.x, myView.center.y

                                + point.y);

    [traget setTranslation:CGPointZero inView:self.view];

}

 

//缩放

- (void)pinch:(UIPinchGestureRecognizer *)traget {

    UIView *myView = traget.view;

    myView.transform = CGAffineTransformMakeScale(traget.scale, traget.scale);

//    myView.transform = CGAffineTransformScale(myView.transform, traget.scale, traget.scale);

//    traget.scale = 1;

}