ios - 单击特定按钮时显示多个警报 Controller ？

Question

我有一个标签，它提出了一个问题，用户需要通过点击“YES”或“NO”按钮来回答。如果用户直接点击 NEXT 按钮，警告会弹出，说 Choose Yes or No 如果用户选择 Yes，那么他会在那里自己得到一个新的子问题，如果用户点击 NEXT 而没有回答子问题，另一个 alertView 应该弹出窗口。在这两种情况下，只显示一个警报 View 。请帮忙这是代码

 -(IBAction)btnNextClicked:(id)sender {

    activeButton = sender;
    if (([_txtOwnerShipPercentage.text isEqualToString:@" "] || _txtOwnerShipPercentage.text==nil || _txtOwnerShipPercentage.text.length==0) && (activeButton.tag == 1)) {
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Warning" message:@"Select Ownership Percentage" preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
       [alertController addAction:okAction];
       [self presentViewController:alertController animated:YES completion:nil];
    } else if (activeButton.tag == 0){
       UIAlertController *alertController2 = [UIAlertController alertControllerWithTitle:@"Warning" message:@"Select 'YES' or 'No'" preferredStyle:UIAlertControllerStyleAlert];
       UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
      [alertController2 addAction:okAction];
      [self presentViewController:alertController2 animated:YES completion:nil];

   }
}

并且我已分别将标签设置为 YES 和 No Button... 1 & 2。activebutton 只不过是全局声明的 UIButton

Answer 1

这里是您如何根据您的要求在一个上下文中管理两个或多个警报 Controller 的代码。

    //declare first alert controller
    UIAlertController *alertviewcontroller1 = [UIAlertController alertControllerWithTitle:@"My Alert 1"
                                                                   message:@"This is an action sheet of alert 1"
                                                            preferredStyle:UIAlertControllerStyleActionSheet];

    //declare second alert controller
    UIAlertController *alertviewcontroller2 = [UIAlertController alertControllerWithTitle:@"My Alert 2"
                                                                                  message:@"This is an action sheet of alert 2"
                                                                           preferredStyle:UIAlertControllerStyleActionSheet];

    //declare first alert controller action with hendler
    UIAlertAction *firstActionOfAlert1 = [UIAlertAction actionWithTitle:@"YES"
                                                          style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {

                                                              //Present second alert controller when user taps on 'YES' of first alert controller.
                                                              [self presentViewController:alertviewcontroller2 animated:YES completion:nil];
                                                          }];

    //declare second alert controller action with hendler
    UIAlertAction *firstActionOfAlert2 = [UIAlertAction actionWithTitle:@"YES"
                                                          style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {


                                                          }];

    //add both actions relatively
    [alertviewcontroller1 addAction:firstActionOfAlert1];
    [alertviewcontroller1 addAction:firstActionOfAlert2];

    //Present first alert controller
    [self presentViewController:alertviewcontroller1 animated:YES completion:nil];