UIAlertController客製化

根據🍎的文件

The UIAlertController class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified.

如果不想理他的話，就用以下的方法吧！

1. 打開contentViewController的束縛
   @interface UIAlertController (ContentViewController)
   @property (nonatomic,retain) UIViewController * contentViewController;
   @end
2. 呼喚神秘的contentViewController
   alertController.contentViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "contentViewController")
3. 如果，使用tableview的話，記得加上
   override func viewWillLayoutSubviews() {

       super.viewWillLayoutSubviews()

           

       // make UITableView fit to content's size

       self.preferredContentSize = self.tableView.contentSize

   
   

   }

code