//獲取鍵盤第一響應(yīng)者
UIWindow*keyWindow = [[UIApplicationsharedApplication]keyWindow];
UIView*firstResponder = [keyWindowperformSelector:@selector(firstResponder)];
//獲取鍵盤第一響應(yīng)者
UIWindow*keyWindow = [[UIApplicationsharedApplication]keyWindow];
UIView*firstResponder = [keyWindowperformSelector:@selector(firstResponder)];