在外部定义了一个返回的方法,在按钮中药调用,最后一行报错,提示我再加一句 as [AnyObject]上去.加上去之后报错信息为:cannot convert value of type '[AnyObject]' to expected argument type '[UIViewController]'
func doBack(){
let currentControllers = self.navigationController?.viewControllers;
let newControllers:NSMutableArray=NSMutableArray(array: currentControllers!)
newControllers.removeLastObject()
self.navigationController?.navigationBarHidden=true;
self.navigationController?.setViewControllers(newControllers as [AnyObject] , animated: true)}
既然是swift，就尽量用swift的东西写代码……
let currentControllers -> var currentControllers
newControllers 不需要了
直接 currentControllers removeLast
PS：你的newControllers 是个Obc对象：NSMutableArray,
方法需要的是一个Array<UIViewController>
这两个是完全不一样的东西……