ios - 显示页面时出现 UiNavigation 错误

Question

我正在编写 Swift在我的这部分代码中，它应该在选择表格中的单元格时打开一个 View Controller 。

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {


    let next = self.storyboard?.instantiateViewController(withIdentifier: "SVC")
    self.navigationController?.pushViewController(next!, animated: true)
    self.present(next!, animated: true, completion: nil)

}

它返回一个错误!!

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present modally an active controller

当我运行它时它工作正常但是当它打开那个特定的 View Controller 时它崩溃并且屏幕卡住

Answer 1

你应该使用这个

self.navigationController?.pushViewController(next!, animated: true)

或者这个

 self.present(next!, animated: true, completion: nil)

编辑:使用这个

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    let next = self.storyboard?.instantiateViewController(withIdentifier: "SVC")
    self.navigationController?.pushViewController(next!, animated: true) 
}