Question

ios开发如何获取当前显示页

Answer 1

-(UIViewController *)getCurrentRootViewController {

UIViewController *result;

// Try to find the root view controller programmically

// Find the top window (that is not an alert view or other window)

UIWindow *topWindow = [[UIApplication sharedApplication] keyWindow];

if (topWindow.windowLevel != UIWindowLevelNormal)

{

NSArray *windows = [[UIApplication sharedApplication] windows];

for(topWindow in windows)

{

if (topWindow.windowLevel == UIWindowLevelNormal)

break;

}

}

UIView *rootView = [[topWindow subviews] objectAtIndex:0];

id nextResponder = [rootView nextResponder];

if ([nextResponder isKindOfClass:[UIViewController class]])

result = nextResponder;

else if ([topWindow respondsToSelector:@selector(rootViewController)] && topWindow.rootViewController != nil)

result = topWindow.rootViewController;

else

NSAssert(NO, @"ShareKit: Could not find a root view controller. You can assign one manually by calling [[SHK currentHelper] setRootViewController:YOURROOTVIEWCONTROLLER].");

return result;

}

Answer 2

利用navigationController，获取栈顶元素。

Answer 3

描述不够清晰啊