为什么CAAnimation Rotation返回到以前的状态 [英] Why CAAnimation Rotation is returning to previous state

问题描述

我正在使用CAKeyFrameAnimation来旋转箭头图像。

I am using CAKeyFrameAnimation to do rotation of an arrow image.

问题是动画后imageview返回到previos状态。

Problem is that the imageview is returning back to the previos state after animation.

代码：


CAKeyframeAnimation * rotation = [CAKeyframeAnimation animation];
rotation.duration = 0.55;
rotation.cumulative = TRUE;
rotation.removedOnCompletion =否；
if（isFlipRight）{
rotation.values = [NSArray arrayWithObjects：
[NSValue valueWithCATransform3D：CATransform3DMakeRotation（0.0，0.0f，1.0f，0.0f）]]，
[NSValue valueWithCATransform3D：CATransform3DMakeRotation（M_PI，0.0f，1.0f，0.0f）]，nil];

CAKeyframeAnimation *rotation = [CAKeyframeAnimation animation]; rotation.duration = 0.55; rotation.cumulative = TRUE; rotation.removedOnCompletion = NO; if (isFlipRight) { rotation.values = [NSArray arrayWithObjects: [NSValue valueWithCATransform3D:CATransform3DMakeRotation(0.0, 0.0f, 1.0f, 0.0f)], [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.0f, 1.0f, 0.0f)],nil];

}
else {
rotation.values = [NSArray arrayWithObjects：
[NSValue valueWithCATransform3D：CATransform3DMakeRotation（M_PI，0.0f，1.0f，0.0f）]，
[NSValue valueWithCATransform3D：CATransform3DMakeRotation（0.0，0.0f，1.0f，0.0f）]， nil];

} else { rotation.values = [NSArray arrayWithObjects: [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI, 0.0f, 1.0f, 0.0f)], [NSValue valueWithCATransform3D:CATransform3DMakeRotation(0.0, 0.0f, 1.0f, 0.0f)],nil];

}

[[arrowImageView layer] addAnimation：rotation forKey：@ transform];


[[arrowImageView layer] addAnimation:rotation forKey:@"transform"];

推荐答案

在调用addAnimation之前添加此行。.

Add this line before calling addAnimation..

rotation.fillMode = kCAFillModeForwards;

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