我想确定键盘将如何设置动画。在iOS6上，我得到了UIKeyboardAnimationCurveUserInfoKey的有效值(应该是UIViewAnimationCurve，其值来自0-3)但该函数返回值7。键盘如何设置动画？7的值可以做什么？NSConcreteNotification0xc472900{name=UIKeyboardWillChangeFrameNotification;userInfo={UIKeyboardAnimationCurveUserInfoKey=7;UIKeyboardAnimationDurationUserInfoKey="0.25";UIK

使用来自NSNotification.userInfo[UIKeyboardAnimationCurveUserInfoKey]的NSNumber在ObjectiveC中我会做以下事情[UIViewanimateWithDuration:1.0delay:0options:(curveValue.intValue即使位移运算符相同，Swift也不允许我这样做。我想获得等效的枚举原始值UIViewAnimationOptionCurveEaseInOut=0UIViewAnimationOptionCurveEaseIn=1UIViewAnimationOptionCurveEaseOu