如何在IOS上找到最頂層視圖控制器現在，我遇到了一些情況，可以方便地找到“最頂層”視圖控制器(負責當前視圖的視圖控制器)，但還沒有找到方法。從根本上說，挑戰是這樣的：考慮到這一點在非視圖控制器的類中執行(或視圖)[并且沒有活動視圖的地址]并且沒有傳遞最頂層視圖控制器的地址(或者說導航控制器的地址)，是否有可能找到該視圖控制器？(如果是的話，怎么做？)或者，如果做不到這一點，是否有可能找到最上面的視圖？
3 回答
呼啦一陣風
TA貢獻1802條經驗 獲得超6個贊
[UIApplication sharedApplication].keyWindow.rootViewController;
呼喚遠方
TA貢獻1856條經驗 獲得超11個贊
+ (UIViewController*) topMostController{
UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topController.presentedViewController) {
topController = topController.presentedViewController;
}
return topController;}SWIFT 3.0+
func topMostController() -> UIViewController? {
guard let window = UIApplication.shared.keyWindow, let rootViewController = window.rootViewController else {
return nil }
var topController = rootViewController while let newTopController = topController.presentedViewController {
topController = newTopController }
return topController}
臨摹微笑
TA貢獻1982條經驗 獲得超2個贊
- (UIViewController*)topViewController {
return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {
if ([rootViewController isKindOfClass:[UITabBarController class]]) {
UITabBarController* tabBarController = (UITabBarController*)rootViewController;
return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
} else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController* navigationController = (UINavigationController*)rootViewController;
return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
} else if (rootViewController.presentedViewController) {
UIViewController* presentedViewController = rootViewController.presentedViewController;
return [self topViewControllerWithRootViewController:presentedViewController];
} else {
return rootViewController;
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