UIWindow(获取当前Viewcontroller)

最新推荐文章于 2023-06-14 11:10:53 发布

转载最新推荐文章于 2023-06-14 11:10:53 发布 · 2.1k 阅读

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本文提供了一个实用的方法来获取iOS应用中当前显示在最顶层的ViewController，适用于导航控制器和标签栏控制器等多种场景。

当前Viewcontroller

- (UIViewController *)topViewController {
    UIViewController *resultVC;
    resultVC = [self _topViewController:[[UIApplication sharedApplication].keyWindow rootViewController]];
    while (resultVC.presentedViewController) {
        resultVC = [self _topViewController:resultVC.presentedViewController];
    }
    return resultVC;
}

- (UIViewController *)_topViewController:(UIViewController *)vc {
    if ([vc isKindOfClass:[UINavigationController class]]) {
        return [self _topViewController:[(UINavigationController *)vc topViewController]];
    } else if ([vc isKindOfClass:[UITabBarController class]]) {
        return [self _topViewController:[(UITabBarController *)vc selectedViewController]];
    } else {
        return vc;
    }
    return nil;
}

http://www.cocoachina.com/ios/20161013/17739.html