无法将值分配给类型 \'String\' 以键入 \'CAMediaTimingFillMode\'答案

【问题标题】：Cannot assign value to type 'String' to type 'CAMediaTimingFillMode'无法将值分配给类型 \'String\' 以键入 \'CAMediaTimingFillMode\'
【发布时间】：2023-01-24 05:21:44
【问题描述】：

继续遇到一个问题，它说“无法将值分配给类型‘字符串’以键入‘CAMEdiaTimingFillMode’undergroup.fillmode= MotionanimationFillModeToValue(Mode: .both)

XCode 建议的修复将 'group.fillMode = MotionAnimationFillModeToValue(mode: .both)' 替换为 'CAMediaTimingFillMode(rawValue: group.fillMode = MotionAnimationFillModeToValue(mode: .both)) ?? <#default value#>' 只是创建一个循环。

    public class func animate(group animations: [CAAnimation], timingFunction: CAMediaTimingFunction = .easeInOut, duration: CFTimeInterval = 0.5) -> CAAnimationGroup {
        let group = CAAnimationGroup()
        group.fillMode = MotionAnimationFillModeToValue(mode: .both)
        group.isRemovedOnCompletion = false
        group.animations = animations
        group.duration = duration
        group.timingFunction = timingFunction
        return group
    }

【问题讨论】：

标签： swift string

【解决方案1】：

fillMode的类型是CAMediaTimingFillMode，一个枚举，timingFunction参数必须是CAMediaTimingFunction实例

public class func animate(group animations: [CAAnimation],
                    timingFunction: CAMediaTimingFunction = .init(name: .easeInEaseOut),
                    duration: CFTimeInterval = 0.5) -> CAAnimationGroup {
    let group = CAAnimationGroup()
    group.fillMode = .both
    group.isRemovedOnCompletion = false
    group.animations = animations
    group.duration = duration
    group.timingFunction = timingFunction
    return group
}

【讨论】：