Swift如何获取当前页面第一响应者？

Question

Swift如何获取当前页面第一响应者？

在网上查OC下可以这么做:

UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
UIView *firstResponder = [keyWindow performSelector:@selector(firstResponder)];

不知道Swift下该如何写呢？求大神指导~谢谢！

Answer 1

if self.view.resignFirstResponder() {
self.view .becomeFirstResponder();
}