使用Storyboard时实例化ViewController

Question

我正在使用Template.displayResults.helpers({ projectsPossible: function () { var utilitiesCheckedDB = Utilities.find({ checked: true }).fetch(); var projectsAll = Projects.find().fetch(); return projectsPossible(utilitiesCheckedDB, projectsAll); } }); // Returns an array of all possible projects depending on the selected utilities function projectsPossible(utilitiesCheckedDB, projectsAll) { var result = []; _.each(projectsAll, function (project) { if (project.utilities.length === _.intersection(project.utilities, checkedCheckboxesList(utilitiesCheckedDB)).length) { result.push(project); } }); return result; } // Returns an array of all checked utilities in the current checkbox database function checkedCheckboxesList(checkedCheckboxesDB) { var result = []; _.each(checkedCheckboxesDB, function (checkbox) { result.push(checkbox.name); }); return result; } 并希望推动视图控制器，以便在点击标签栏项目时显示在Storyboard中。

为此，我使用与UITabBarController上创建的ViewController关联的现有TabBarController并使用以下代码。但是，我得到例外， Storyboard不包含带标识符的视图控制器＆＃39; SwitchViewController＆＃39;

Storyboard

更新：我在func tabBarController(tabBarController: UITabBarController, shouldSelectViewController viewController: UIViewController) -> Bool { let switchViewController = self.storyboard?.instantiateViewControllerWithIdentifier("SwitchViewController") self.presentViewController(switchViewController, animated: true, completion: nil) return false } 中为Storyboard ID添加了SwitchViewController，并对上述代码进行了评论。当我移动到此选项卡时，应用程序失败并出现相同的错误

我正在使用iOS 8和Xcode 7.请帮助

Answer 1

检查您的故事板ID，

试试这个，

func tabBarController(tabBarController: UITabBarController, shouldSelectViewController viewController: UIViewController) -> Bool {

    if viewController is SwitchViewController {
        let switchViewController = self.storyboard?.instantiateViewControllerWithIdentifier("SwitchViewController") as! SwitchViewController
        self.presentViewController(switchViewController, animated: true, completion: nil)
        return false
    }

    return true
}

Answer 2

请尝试以下代码：     让storyboard = UIStoryboard（名称：＆＃34; Main＆＃34;，bundle：nil）     让VC = storyboard.instantiateViewControllerWithIdentifier（＆＃34; SwitchViewController＆＃34;）