『ios』在任何地方获取当前所在的控制器

开发中，我们经常会进行一系列的封装，业务逻辑区分，在这时候我们就需要拿到当前的控制器，当然你也可以把控制器传进来。当然也有偷懒的方法。下面的方法考虑的了很多种情况，相信满足大部分的需求。

-(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;
}

-(UIViewController *)getCurrentUIVC
{
    UIViewController  *superVC = [self getCurrentVC];
    
    if ([superVC isKindOfClass:[UITabBarController class]]) {
        
        UIViewController  *tabSelectVC = ((UITabBarController*)superVC).selectedViewController;
        
        if ([tabSelectVC isKindOfClass:[UINavigationController class]]) {
            
            return ((UINavigationController*)tabSelectVC).viewControllers.lastObject;
        }
        return tabSelectVC;
    }else
        if ([superVC isKindOfClass:[UINavigationController class]]) {
            
            return ((UINavigationController*)superVC).viewControllers.lastObject;
        }
    return superVC;
}

ios自习室欢迎进入，一起学习一起进步。

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