'animate(withDuration:delay:options:animations:)' 的使用不明确

Question

我已经升级到新发布的Xcode 8，而这个

let mediumInterval: TimeInterval = 0.6
UIView.animate(withDuration: mediumInterval) {
  print("test")
}

给我错误 Ambiguous use of 'animate(withDuration:delay:options:animations:)' 我真的不明白这里有什么歧义... UIView 中声明的所有 animate 函数都是

open class func animate(withDuration duration: TimeInterval, delay: TimeInterval, options: UIViewAnimationOptions = [], animations: @escaping () -> Swift.Void, completion: (@escaping (Bool) -> Swift.Void)? = nil)

open class func animate(withDuration duration: TimeInterval, animations: @escaping () -> Swift.Void, completion: (@escaping (Bool) -> Swift.Void)? = nil)

open class func animate(withDuration duration: TimeInterval, animations: @escaping () -> Swift.Void)

open class func animate(withDuration duration: TimeInterval, delay: TimeInterval, usingSpringWithDamping dampingRatio: CGFloat, initialSpringVelocity velocity: CGFloat, options: UIViewAnimationOptions = [], animations: @escaping () -> Swift.Void, completion: (@escaping (Bool) -> Swift.Void)? = nil)

===获取xcode编译的解决方案===

UIView.animate(withDuration: mediumInterval, animation: {
  print("test")
}, completion: nil)

会编译，

UIView.animate(withDuration: mediumInterval, animation: {
  print("test")
})

会像以前一样失败。我还是不明白发生了什么...

Answer 1

我一直在使用的 PromiseKit 似乎有一个 UIView 的扩展，它定义了一个冲突版本的 animate (https://github.com/PromiseKit/UIKit/blob/master/Sources/UIView%2BPromise.swift)

XCode 无法告诉我这两个相互冲突的版本来自哪里，所以我花了一段时间才明白。我已经报告了这个问题。

Answer 2

我有同样的错误，因为我忘记在 "animation" 中添加 "s"。所以也许 :

UIView.animate(withDuration: mediumInterval, animation: {
  print("test")
})

因此无法编译。

'animate(withDuration:delay:options:animations:)' 的使用不明确

Ambiguous use of 'animate(withDuration:delay:options:animations:)'

overloading

compilation

swift