获取当前屏幕显示的viewcontroller

​​//获取当前屏幕显示的viewcontroller  ​​

​​- (​​​​UIViewController​​​ ​​*)getCurrentVC  ​​

​​{  ​​

​​UIViewController​​​ ​​*result =​​​ ​​nil​​​​;  ​​

 

​​UIWindow​​​ ​​* window = [[​​​​UIApplication​​​ ​​sharedApplication​​​​]​​​ ​​keyWindow​​​​];  ​​


​​if​​​ ​​(window​​​​.windowLevel​​​ ​​!= UIWindowLevelNormal)  ​​


​​{  ​​


​​NSArray​​​ ​​*windows = [[​​​​UIApplication​​​ ​​sharedApplication​​​​]​​​ ​​windows​​​​];  ​​


​​for​​​​(​​​​UIWindow​​​ ​​* tmpWin ​​​​in​​​ ​​windows)  ​​


​​{  ​​


​​if​​​ ​​(tmpWin​​​​.windowLevel​​​ ​​== UIWindowLevelNormal)  ​​


​​{  ​​


​​window = tmpWin;  ​​


​​break;  ​​


​​}  ​​


​​}  ​​


​​}  ​​

 

​​UIView​​​ ​​*frontView = [[window​​​ ​​subviews​​​​]​​​ ​​objectAtIndex​​​​:​​​​0​​​​];  ​​


​​id​​​ ​​nextResponder = [frontView​​​ ​​nextResponder​​​​];  ​​

 

​​if​​​ ​​([nextResponder​​​ ​​isKindOfClass​​​​:[​​​​UIViewController​​​ ​​class​​​​]])  ​​


​​result = nextResponder;  ​​


​​else​​ 

​​result = window​​​​.rootViewController​​​​;  ​​

 

​​return​​​ ​​result;  ​​

​​}​​