如何实现这种文字切换动画？每个角色都有不透明度、位置和模糊的更改。不透明度和位置正在起作用。我找不到模糊的方法。就像这样：

func runTextAnimationPostion_Show() -> Void {
    isShowing = true
    for (idx,item) in textLayers.enumerated() {
        item.position = textLayerPostions[idx];
        item.removeAllAnimations();
        item.opacity = 0.0
    }
    
    for (index,textLayer) in textLayers.enumerated() {
        
        let animation2 = CABasicAnimation(keyPath: "opacity");
        animation2.fromValue = 0.0
        animation2.toValue = 1.0;
        let duration2 = Double(animationTime / Double(textLayers.count));
        animation2.duration = duration2*3.0;
        animation2.repeatCount = 1;
        animation2.beginTime = CACurrentMediaTime() + Double(index) * duration2;
        animation2.fillMode = .forwards;
        animation2.isRemovedOnCompletion = false;
        textLayer.add(animation2, forKey: "\(index)+o");
        
        
        let position = textLayerPostions[index];
        
        let point = CGPoint(x: textLayer.position.x, y: position.y - 10);
        textLayer.position = point;
        let animation = CABasicAnimation(keyPath: "position");
        animation.fromValue = point
        animation.toValue = position;
        let duration = Double(animationTime / Double(textLayers.count));
        animation.duration = duration*3.0;
        animation.repeatCount = 1;
        animation.beginTime = CACurrentMediaTime() + Double(index) * duration;
        animation.fillMode = .forwards;
        animation.isRemovedOnCompletion = false;
        textLayer.add(animation, forKey: "\(index)");
    }
}