如何创建iOS 9音乐应用中使用的模糊/色彩效果？

Question

您将如何实现下面链接中出现的模糊/色彩效果（说实话，我不太清楚这是什么）？

谢谢！

Answer 1

好的，我以任何方式发布链接答案的快速版本，类似于您的要求。

您可以按照下面的步骤进行操作，只需创建一个具有颜色u的渐变层，然后将其分布在整个渐变层上，最后将渐变设置为图像视图即可，例如

@IBOutlet weak var aImageView: UIImageView!
var theColor: UIColor?
var gradientLayer:CAGradientLayer?
override func viewDidLoad() 
{
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
 self.theColor = UIColor(colorLiteralRed: 146.0/255.0, green: 146.0/255.0, blue: 146.0/255.0, alpha: 1)
 self.gradientLayer = CAGradientLayer()
 self.gradientLayer?.frame = self.aImageView.frame
 let array: [AnyObject] = [(theColor?.colorWithAlphaComponent(0.1))!.CGColor,
 (theColor?.colorWithAlphaComponent(0.12))!.CGColor,(theColor?.colorWithAlphaComponent(0.13))!.CGColor,
 (theColor?.colorWithAlphaComponent(0.74))!.CGColor,
 (theColor?.colorWithAlphaComponent(0.82))!.CGColor,
 (theColor?.colorWithAlphaComponent(1.0))!.CGColor]
 gradientLayer?.colors = array;
    aImageView.layer .addSublayer(gradientLayer!);
}

只需尝试放入示例项目中，结果将如下所示