在Objective C中,我将执行以下操作

[UIView animateWithDuration:1.0
                      delay:0
                    options:(curveValue.intValue << 16)

即使bitshift运算符相同,Swift也不允许我这样做.我想获得相当于枚举的原始值

UIViewAnimationOptionCurveEaseInOut = 0<< 16,UIViewAnimationOptionCurveEaseIn = 1<< 16,UIViewAnimationOptionCurveEaSEOut = 2<< 16,UIViewAnimationOptionCurveLinear = 3<< 16,更新 我不确定以下方法是否正确,似乎有效

var animationCurve : UIViewAnimationOptions = UIViewAnimationOptions.CurveEaSEOut
 info[UIKeyboardAnimationCurveUserInfoKey].getValue(&animationCurve)
 
 
 UIView.animateWithDuration(durationValue.doubleValue,delay: 0,options: animationCurve,animations: {self.navigationController.toolbar.frame = myRect},completion: nil)