动画组合

动画组合(uber启动时的等待效果代码)

- (void)startAnimation {

    self.layer.masksToBounds= 0;
    self.layer.cornerRadius= 50;
    if (self.layer.sublayers== nil) {
        [selfsetUpAnimation];
    }
    self.layer.speed= 1;
}

- (void)setUpAnimation {
    CABasicAnimation *posAnim = [CABasicAnimationanimationWithKeyPath:@"transform.scale"];
    posAnim.fromValue= @(0.01);
    posAnim.toValue= @(1);
    posAnim.duration= 1;
    posAnim.timingFunction= [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];
   
    CABasicAnimation *opacity = [CABasicAnimationanimationWithKeyPath:@"opacity"];
    opacity.fromValue= @(1);
    opacity.toValue= @(0);
    opacity.duration= 1;
    opacity.timingFunction= [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];
   
    CAAnimationGroup *animGroup = [CAAnimationGroupanimation];
    animGroup.animations= [NSArrayarrayWithObjects:posAnim, opacity,nil];
    animGroup.duration= 1;
    animGroup.repeatCount= HUGE;
    [self.layeraddAnimation:animGroupforKey:nil];}