ios-chat/wfuikit/WFChatUIKit/Vendor/LBXScan/LBXAlertAction/Class/UIWindow+LBXHierarchy.m

//
//  UIWindow+Hierarchy.m
// https://github.com/hackiftekhar/IQKeyboardManager
// Copyright (c) 2013-16 Iftekhar Qurashi.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#import "UIWindow+LBXHierarchy.h"
#import <UIKit/UINavigationController.h>

@implementation UIWindow (LBXHierarchy)

- (UIViewController*)topMostController
{
    UIViewController *topController = [self rootViewController];
    
    //  Getting topMost ViewController
    while ([topController presentedViewController])	topController = [topController presentedViewController];
	
    //  Returning topMost ViewController
    return topController;
}

- (UIViewController*)currentViewController;
{
    UIViewController *currentViewController = [self topMostController];
    
    while ([currentViewController isKindOfClass:[UINavigationController class]] && [(UINavigationController*)currentViewController topViewController])
        currentViewController = [(UINavigationController*)currentViewController topViewController];
    
    return currentViewController;
}


@end