iphone - 如何将 3d View 旋转 360 度？

Question

我正在开发一个应用程序，我在其中将 View 旋转 360 度，但我无法将其旋转 360 度。 它旋转了 180 度，旋转后又回到了原来的位置..

animation = [CABasicAnimation animationWithKeyPath:@"transform"];
transform = CATransform3DMakeRotation(3.14f, 1.0f, 1.0f, 1.0f);  
value = [NSValue valueWithCATransform3D:transform]; 
[animation setToValue:value];
[animation setAutoreverses:YES]; 
[animation setDuration:0.9];
[[rotatBall layer] addAnimation:animation forKey:@"180"];  //rotatBall is a view

换句话说，就是来回旋转。 如何连续旋转它...... 请帮助...

Answer 1

这有点棘手，但您可以在 docs 中找到它.
要连续旋转它，您首先需要设置 toValue，然后将动画重复计数设置为 HUGH_VALF(在 math.h 中定义)。

    CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];

    transform = CATransform3DMakeRotation(1.0f, 1.0f, 1.0f, 1.0f);  
    fromValue = [NSValue valueWithCATransform3D:transform];

    transform = CATransform3DMakeRotation(M_PI*2, 1.0f, 1.0f, 1.0f);  
    toValue = [NSValue valueWithCATransform3D:transform];

    animation.fromValue = fromValue;
    animation.toValue = toValue;
    animation.duration = 0.9f; 
    animation.repeatCount = HUGE_VALF;     // HUGE_VALF is defined in math.h so import it
    [rotatBall.layer addAnimation:animation forKey:@"rotation"];