iOS彈窗UIAlertAction用法

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"確認" message:@"確認刪除嗎？" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
        //取消處理
    }];
    
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"確認" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        //確認處理
    }];
    
    [alert addAction:action1];
    [alert addAction:action2];
    [self.navigationController presentViewController:alert animated:YES completion:nil];