此代码在以前版本的 Xcode 中运行良好,但现在不显示任何内容。它只显示“正在运行的项目”的事件指示器
import UIKit
import PlaygroundSupport
let container = UIView()
container.frame.size = CGSize(width: 215.0, height: 215.0)
var view = UIView()
view.frame.size = CGSize(width: 185.0, height: 185.0)
view.center = container.center
view.layer.cornerRadius = view.frame.size.height/2
view.backgroundColor = UIColor.white
container.addSubview(view)
let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
scaleAnimation.fromValue = CGFloat(0.6)
scaleAnimation.toValue = CGFloat(1.15)
scaleAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
scaleAnimation.isRemovedOnCompletion = false
let opacityAnimation = CABasicAnimation(keyPath: "opacity")
opacityAnimation.fromValue = CGFloat(0.0)
opacityAnimation.toValue = CGFloat(0.1)
opacityAnimation.duration = 1
opacityAnimation.isRemovedOnCompletion = false
opacityAnimation.autoreverses = true;
let circleAnimations: CAAnimationGroup = CAAnimationGroup()
circleAnimations.duration = 2
circleAnimations.repeatCount = HUGE;
circleAnimations.animations = [scaleAnimation, opacityAnimation];
view.layer .add(circleAnimations, forKey: "circleAnimations")
PlaygroundPage.current.liveView = container
PlaygroundPage.current.needsIndefiniteExecution = true
有什么问题吗?
最佳答案
关于ios - Xcode 8.3.2 Playground 实时 View 渲染不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43654195/