将NSNotification.userInfo [UIKeyboardAnimationCurveUserInfoKey]转换为Enum [英] Convert NSNotification.userInfo[UIKeyboardAnimationCurveUserInfoKey] to Enum

问题描述

使用NSNotification.userInfo中的NSNumber [UIKeyboardAnimationCurveUserInfoKey]

Using NSNumber from NSNotification.userInfo[UIKeyboardAnimationCurveUserInfoKey]

在目标CI中将执行以下操作

In Objective C I would do the following

 [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。我想得到相当的枚举原始值

Swift will not allow me to do the same even though the bitshift operator is the same. I would like to get the enum raw value which is equivalent

UIViewAnimationOptionCurveEaseInOut = 0<< 16，

UIViewAnimationOptionCurveEaseInOut = 0 << 16,

UIViewAnimationOptionCurveEaseIn = 1<< 16，

UIViewAnimationOptionCurveEaseIn = 1 << 16,

UIViewAnimationOptionCurveEaseOut = 2<< 16，

UIViewAnimationOptionCurveEaseOut = 2 << 16,

UIViewAnimationOptionCurveLinear = 3<< 16，

UIViewAnimationOptionCurveLinear = 3 << 16,

更新

我不确定是否下面的方法是正确的，它似乎工作

I am not sure if the below approach is correct , it seems to work

 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)

推荐答案

在Beta-5中

UIViewAnimationOptions.fromRaw(
    UInt(
        ( p.userInfo[ UIKeyboardAnimationCurveUserInfoKey ] as NSNumber ).unsignedIntValue << 16
    )
)!

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