40.iOS循环播放雷达扫描动画--Life365中的开启定位

//循环播放动画

_locationImageView.image = [UIImage imageNamed:@"scanning"];

CABasicAnimation *animation = [CABasicAnimationanimationWithKeyPath:@"transform.rotation.z"];

animation.fromValue = @(0);

animation.toValue = @(2*M_PI);

animation.duration = 1.f;//

animation.repeatCount = INT_MAX;//重复时间

[_locationImageView.layer addAnimation:animationforKey:@"keyFrameAnimation"];

[self.layer removeAllAnimations];//移除动画