viewcontroller

在静态函数中如何获取当前视图?  
[[UIApplication sharedApplication].keyWindow.rootViewController ]
怎么获取当前的视图controller？
01.-(void) myCommonMethod:(UIViewController*) aViewController
02.{
03.      if([aViewController isMemberOfClass:NSClassFromString(@"MyFirstController")])
04.      {
05.      }
06.      else if([aViewController isMemberOfClass:NSClassFromString(@"MySecondController")])
07.      { 
08.
09.      }
10.}
如何获取当前视图中成为第一响应者的组件,并取消注册
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
UIView *firstResponder = [keyWindow performSelector:@selector(firstResponder)];
[firstResponder resignFirstResponder];