【IOS】获取顶层UIViewController
Objective-c版本:
- (UIViewController *)appRootViewController { UIViewController *appRootVC = [UIApplication sharedApplication].keyWindow.rootViewController; UIViewController *topVC = appRootVC; while (topVC.presentedViewController) { topVC = topVC.presentedViewController; } return topVC; }
Swift版本:
func AppRootViewController() -> UIViewController? { var topVC = UIApplication.sharedApplication().keyWindow?.rootViewController while topVC?.presentedViewController != nil { topVC = topVC?.presentedViewController } return topVC? }
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