Question

请帮助我，如何平滑地旋转（投掷）一个圆形图像时钟以及逆时针，

我尝试了很多但没有得到正确的结果。

所以请帮助我，提前谢谢。

（void）viewDidLoad {   [super viewDidLoad];   ij = 0; rotatingDirection = 1; additionalOffset = 0; totalAnglesRotated = 0; isInFlingMode = TRUE; isOptionSelected =   假;   viewAnimation.hidden = FALSE; [[NSNotificationCenter defaultCenter] addObserver：self   selector：@selector（_handleWhateverChange）name：@“DataDownload”   对象：无];

panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget：self action：@selector（move :)]; [panRecognizer   setMinimumNumberOfTouches：1]; [panRecognizer   setMaximumNumberOfTouches：1]; [panRecognizer setDelegate：self];   [imgViewdialer addGestureRecognizer：panRecognizer];
[self Imagesswipemethod];
}

-(void)move:(id)sender {
            //[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations];

    CGPoint convertedPoint = [self.view.superview convertPoint:self.view.frame.origin toView:nil];
        // NSLog(@" Convert Point.. :: x = %f , y = %f",convertedPoint.x,convertedPoint.y);

            [imgViewdialer bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]];         CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:view1.superview];   //  NSLog(@" trans values.. :: x
= %f , y = %f",translatedPoint.x,translatedPoint.y);

    int y=translatedPoint.y;
    int xx = translatedPoint.x;

        if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
                        firstX = [[sender view] center].x;          firstY = [[sender view] center].y;      }
                translatedPoint = CGPointMake(firstX+translatedPoint.x, firstY+translatedPoint.y);
                if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
                        if (isInFlingMode) {


                //NSLog(@"Completed");
                CGPoint vPoint = [panRecognizer velocityInView:imgViewdialer.superview];
                double point = [panRecognizer locationInView:view1].x;
                double pinty = [panRecognizer locationInView:view1].y;

                NSLog(@"touch Point y %f",pinty);
                NSLog(@"touch Point x %f",point);
                NSLog(@"Translate Point x %d",xx);
                NSLog(@"Translate Point y %d",y);




                float angleToBeRotated = (vPoint.x + vPoint.y) ;
                //(vPoint.x < 0) && (vPoint.y >= 0)) || ((vPoint.x < 0) && (vPoint.y < 0)
                if(point>160)
                {
                    if(y<0)
                        rotatingDirection = -1;
                    else if(y>0)
                        rotatingDirection = 1;

                } else {

                    if(y<0)
                        rotatingDirection = 1;
                    else if(y>0)
                        rotatingDirection = -1;
                }

                if(pinty > 200 && xx <0)
                    rotatingDirection = 1;
                else if(pinty >200 && xx>160)
                    rotatingDirection = -1;

                            //  rotatingDirection = 1;

                angleToBeRotated = (angleToBeRotated > 0) ? angleToBeRotated : (angleToBeRotated * -1);

                globalAngle = angleToBeRotated;

                ////NSLog(@"angleToBeRotated = %f", (globalAngle / 75.0));

                [NSThread detachNewThreadSelector:@selector(rotaterThreadMethod) toTarget:self withObject:nil];
                        }       } else {
                /*  CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender locationInView:view1];           ////NSLog(@"Current Point X = %f, Y = %f", translatedPoint.x + firstX, translatedPoint.y + firstY);             previousTouchPoint = CGPointMake(firstX, firstY);
                        if(!isOptionSelected) {
                CGPoint center = CGPointMake(CGRectGetMidX([imgViewdialer bounds]), CGRectGetMidY([imgViewdialer bounds]));
                ////NSLog(@"Center Point X = %f, Y = %f", center.x, center.y);
                CGPoint currentTouchPoint = CGPointMake(translatedPoint.x , translatedPoint.y);
                CGFloat angleInRadians;
                if((previousTouchPoint.x != 0) && (previousTouchPoint.y != 0)) {
                    angleInRadians = atan2f(currentTouchPoint.y - center.y, currentTouchPoint.x - center.x) - atan2f(previousTouchPoint.y - center.y, previousTouchPoint.x - center.x);
                }
                //previousTouchPoint = currentTouchPoint;
                CGFloat angleInDegree = RadianTodegrees(angleInRadians);

                angleInDegree = globalAngle+angleInDegree;
                [self rotateAccordingToAngle:degreesToRadian(angleInDegree)];

                revolutions+= (angleInDegree/360.0f);           }*/
                    }    }



- (void)rotateAccordingToAngle:(float) angle
{
    ////NSLog(@"Current Global Angle = %f", globalAngle);

    totalAnglesRotated += RadianTodegrees(angle);

    if(totalAnglesRotated >= 360)
        totalAnglesRotated -= 360;
    else if(totalAnglesRotated <= -360)
        totalAnglesRotated += 360;


    lblRotatingAngle.text = [[NSNumber numberWithFloat:totalAnglesRotated] stringValue];

    [imgViewdialer setTransform:CGAffineTransformRotate(imgViewdialer.transform, angle)];
}

Answer 1

尝试使用旋转识别器，这将对您有所帮助：

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

[rotationrecognizer setDelegate:self];


[img12 addGestureRecognizer:rotationrecognizer];

之后：

-(void)rotate:(id)sender
{

NSLog(@"rotate method called");


[self.view bringSubviewToFront:[(UIRotationGestureRecognizer*)sender view]];

if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
        lastRotation = 0.0;
        return;
}

CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)sender rotation]);


CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform;
            CGAffineTransform newTransform = 
CGAffineTransformRotate(currentTransform,rotation);


[[(UIRotationGestureRecognizer*)sender view] setTransform:newTransform];


lastRotation = [(UIRotationGestureRecognizer*)sender rotation];

}

Answer 2

浏览Gesture Implementation。我认为这是手势的最佳链接之一。

需要使用Pan Gesture旋转（fluring）图像

2 个答案: