#252 NSInvalidArgumentException -[UIWindow presentViewController:animated:completion:]: unrecognized selector sent to instance 0x1355b0a40 StudentGrowth -[LWImageBrowser show]

[2240054474]

#252 NSInvalidArgumentException -[UIWindow presentViewController:animated:completion:]: unrecognized selector sent to instance 0x1355b0a40 StudentGrowth -[LWImageBrowser show] crash

[Jake-Chiu]

• (UIViewController )_getParentVC{ 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; } } }

  result = window.rootViewController; if (result.presentedViewController) {

    result = result.presentedViewController;
  

  } // else{ // // UIView* frontView = [[window subviews] objectAtIndex:0]; // nextResponder = [frontView nextResponder]; // } if ([result isKindOfClass:[UITabBarController class]]){

    UITabBarController* tabbar = (UITabBarController *)result;
    UINavigationController* nav = (UINavigationController *)tabbar.viewControllers[tabbar.selectedIndex];
    result=nav.childViewControllers.lastObject;
  

  } else if ([result isKindOfClass:[UINavigationController class]]){

    UIViewController * nav = (UIViewController *)result;
    result = nav.childViewControllers.lastObject;
  

  } // else { // // result = nextResponder; // } return result; } 把这个方法改下，就ok了，他写的不对，这个方法是获取当前控制器