type of expression is ambiguous

UIView .animateWithDuration(highlightTime,

delay: 0.0,

options: .CurveLinear & .AllowUserInteraction & .BeginFromCurrentState,

animations: {

button.backgroundColor = highlightColor

}, completion: { finished in

button.backgroundColor = originalColor

var newIndex: Int = Index + 1

self.playSequence(newIndex, highlightTime: highlightTime)

})
以上是代码第三行 options的那一行总出现type of expression is ambiguous without the context的错误提示 请问这是怎么回事儿呀

UIView.animateWithDuration(NSTimeInterval(highlightTime),
delay: NSTimeInterval(0.0),
options: [.CurveLinear, .AllowUserInteraction, .BeginFromCurrentState],
animations: {
button.backgroundColor = highlightColor
}, completion: { finished in
button.backgroundColor = originalColor
var newIndex : Int = index + 1
self.playSequence(newIndex, highlightTime: highlightTime)
})
国外的论坛上看到，改成这样就不会提示错误了

你好！ 是在xcode 7.2 beta版本 别的版本都好 仅代表个人观点，不喜勿喷，谢谢。