问题描述
我有一个有 4 个标签的 UITabBarController。我想为第二个标签栏项目显示不同的视图控制器。根据我想显示该标签栏项目的视图控制器的条件。
我写了以下代码:
UITabbarController -
override func tabBar(_ tabBar: UITabBar,didSelect item: UITabBarItem) {
if item.tag == 2 {
if UserDefaults.standard.bool(forKey: "FirstTimeUser") == true {
// let vc1 = storyboard?.instantiateViewController(identifier: "CreateNewProjectViewController") as! CreateNewProjectViewController
// self.navigationController?.pushViewController(vc1,animated: true)
let vc1 = self.storyboard?.instantiateViewController(withIdentifier: "CreateNewProjectViewController") as! CreateNewProjectViewController
let window = UIApplication.shared.windows.first
window?.rootViewController = vc1
tabBarController?.tabBar.isHidden = false
}else {
// let vc2 = storyboard?.instantiateViewController(identifier: "ProjectsViewController") as! ProjectsViewController
// self.navigationController?.pushViewController(vc2,animated: true)
let vc2 = self.storyboard?.instantiateViewController(withIdentifier: "ProjectsViewController") as! ProjectsViewController
let window = UIApplication.shared.windows.first
window?.rootViewController = vc2
tabBarController?.tabBar.isHidden = false
}
}
}
我尝试使用 navigationController 但它显示空白屏幕。
如果我尝试使用“
”设置视图控制器let vc2 = self.storyboard?.instantiateViewController(withIdentifier: "ProjectsViewController") as! ProjectsViewController
let window = UIApplication.shared.windows.first
window?.rootViewController = vc2
tabBarController?.tabBar.isHidden = false
解决方法
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