我有以下ViewController：
class PageContentViewController: UIViewController {
var pageIndex: Int
}
如何从另一个ViewController访问pageIndex？
我需要在此功能中访问pageIndex：
func pageViewController(pageViewController: UIPageViewController!,viewControllerBeforeViewController viewController: UIViewController!) -> UIViewController! {
//var index: Int
//index = ?
NSUInteger index = ((PageContentViewController*) viewController).pageIndex; // in Swift?
if ((index == 0) || (index == NSNotFound)) {
return nil;
}
index--;
return [self viewControllerAtIndex:index]; // in Swift?
}
解决方法
swift中默认的一切都是公开的,因此如果你声明如下：
class SomeViewController: UIViewController {
var someVariable: SomeType = someValue
init(nibName nibNameOrNil: String?,bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil,bundle: nibBundleOrNil)
}
}
只要你有一个实例,你可以访问它：
var myCustomViewController: SomeViewController = SomeViewController(nibName: nil,bundle: nil) var getThatValue = myCustomViewController.someVariable