iOS-获取界面控制器

获取控制器的几种方法

#pragma mark - 获取UIView所在控制器
static inline UIViewController * GetCurrentViewControllerByView(UIView *view)
{
    for (UIView *next = [view superview]; next; next = next.superview) {
        UIResponder* nextResponder = [next nextResponder];
        if ([nextResponder isKindOfClass:[UIViewController class]]) {
            return (UIViewController*)nextResponder;
        }
    }
    return nil;
}

#pragma mark - 获取当前控制器
static inline UIViewController * GetCurrentViewController()
{
    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;
}

#pragma mark - 获取当前模态出来的控制器
static inline UIViewController * GetPresentedViewController()
{
    UIViewController *rootVC = [UIApplication sharedApplication].keyWindow.rootViewController;
    UIViewController *topVC = rootVC;
    if (topVC.presentedViewController) {
        topVC = topVC.presentedViewController;
    }
    return topVC;
}