获取iOS应用中当前处于Activity状态的ViewController
// 获取当前处于activity状态的view controller - (UIViewController *)activityViewController { UIViewController* activityViewController = 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; } } } NSArray *viewsArray = [window subviews]; if([viewsArray count] > 0) { UIView *frontView = [viewsArray objectAtIndex:0]; id nextResponder = [frontView nextResponder]; if([nextResponder isKindOfClass:[UIViewController class]]) { activityViewController = nextResponder; } else { activityViewController = window.rootViewController; } } return activityViewController; }
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