AppDelegate中获取UINavigationController或者UITabBarController
// 在AppDelegate中收到推送消息后可以用这个方法拿到控制器直接完成跳转.
- (UIViewController *)currentViewController {
UIViewController *result = nil;
UIWindow *window = [[UIApplication sharedApplication] keyWindow];
//app默认windowLevel是UIWindowLevelNormal，如果不是，找到UIWindowLevelNormal的
if (window.windowLevel != UIWindowLevelNormal) {
NSArray *windows = [[UIApplication sharedApplication] windows];
for(UIWindow *tmpWin in windows) {
if (tmpWin.windowLevel == UIWindowLevelNormal) {
window = tmpWin;
break;
}
}
}
id nextResponder = nil;
UIViewController *appRootVC=window.rootViewController;
if (appRootVC.presentedViewController) {
nextResponder = appRootVC.presentedViewController;
} else {
UIView *frontView = [[window subviews] objectAtIndex:0];
nextResponder = [frontView nextResponder];
}
if ([nextResponder isKindOfClass:[UITabBarController class]]){
UITabBarController *tabbar = (UITabBarController *)nextResponder;
UINavigationController *nav = (UINavigationController *)tabbar.viewControllers[tabbar.selectedIndex];
result = nav.childViewControllers.lastObject;
} else if ([nextResponder isKindOfClass:[UINavigationController class]]){
UIViewController *nav = (UIViewController *)nextResponder;
result = nav.childViewControllers.lastObject;
} else {
result = nextResponder;
}
return result;
}
