swift中怎么强制类型转化为AnyObject

Question

UIDevice.currentDevice().performSelector(

    "setOrientation:",

    withObject:UIInterfaceOrientation.LandscapeRight

)

有如上代码 后面 withObject 的参数是一个 AnyObject 类型的，这样直接传的话会报错，试过几种方法都不行，求大神帮忙。T T

Answer 1

id 对应 AnyObject?, 你定义一个带?的var试验下：import Foundationfunc displayObjectName(yourobject : AnyObject?){    NSLog("%@",yourobject as! String);}var s:String?="Hello,World";displayObjectName(s);

Answer 2

改传 UIInterfaceOrientation.LandscapeRight.rawValue