ios - 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

改传 UIInterfaceOrientation.LandscapeRight.rawValue

Answer 2

id 对应 AnyObject?, 你定义一个带?的var试验下：

import Foundation
func displayObjectName(yourobject : AnyObject?)
{
    NSLog("%@",yourobject as! String);
}


var s:String?="Hello,World";
displayObjectName(s);