Question

我正在生成一个UIAlertController，用于在iOS8中替换UIActionSheet函数。

控制器正确显示，但我无法点击控制器中的任何位置来获取响应。我把简单的NSLog放入处理程序中，绝对不会触发。

有人能解释一下这个问题吗？

BTW，在iOS8中，UIActionSheet也没有生成点击事件，但在iOS7中，这完全没有代码更改。

这是代码：

    NSString *alertMessage = @"How do you wish to share ?";
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Share Image"
                                                                   message:alertMessage
                                                            preferredStyle:UIAlertControllerStyleAlert];

    // You can add as many actions as you want
    UIAlertAction *emailShare = [UIAlertAction actionWithTitle:@"Share using email"
                                                              style:UIAlertActionStyleDefault
                                                            handler:^(UIAlertAction *action) {
                                                                NSLog(@"EMAIL");
                                                            }];

    UIAlertAction *smShare = [UIAlertAction actionWithTitle:@"Share using twitter/facebook"
                                                              style:UIAlertActionStyleDefault
                                                            handler:^(UIAlertAction *action) {
                                                                [self actionSheet:nil didDismissWithButtonIndex:1];
                                                            }];

    UIAlertAction *cancelShare = [UIAlertAction actionWithTitle:@"cancel"
                                                      style:UIAlertActionStyleDefault
                                                    handler:^(UIAlertAction *action) {
                                                        [self actionSheet:nil didDismissWithButtonIndex:2];
                                                    }];

    // Add actions to the controller so they will appear
    [alertController addAction:emailShare];
    [alertController addAction:smShare];
    [alertController addAction:cancelShare];

    // Finally present the action
    [self presentViewController:alertController animated:YES completion:nil];

Answer 1

您的代码存在一些不同的问题。我评论了必要的变化。如果您有任何问题，请告诉我。

// No need to create a NSString. Just set the message.
// NSString *alertMessage = @"How do you wish to share?";

// If you'd like a UIActionSheet use UIAlertControllerStyleActionSheet as the preferredStyle
// Opposed to UIAlertControllerStyleAlert, which presents a UIAlertView

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Share Image"
                                                                         message:@"How do you wish to share?" // Message Set
                                                                  preferredStyle:UIAlertControllerStyleActionSheet]; // Changed to show action sheet

UIAlertAction *emailShare = [UIAlertAction actionWithTitle:@"Share using email"
                                                     style:UIAlertActionStyleDefault
                                                   handler:^(UIAlertAction *action) {
                                                       [alertController dismissViewControllerAnimated:YES completion:nil];
                                                       // Call your function here
                                                       // ie. [self emailShare];
                                                       NSLog(@"First Button");
                                                   }];
UIAlertAction *smShare = [UIAlertAction actionWithTitle:@"Share using twitter/facebook"
                                                  style:UIAlertActionStyleDefault
                                                handler:^(UIAlertAction *action) {
                                                    // [self actionSheet:nil didDismissWithButtonIndex:1];
                                                    // Where did you create actionSheet?
                                                    // didDismissWithButtonIndex: is not neccessary
                                                    // Just simply dismiss the UIAlertController
                                                    [alertController dismissViewControllerAnimated:YES completion:nil];
                                                    // And then call your function here
                                                    // ie. [self twitterShare];
                                                    NSLog(@"Second Button");
                                                }];
UIAlertAction *cancelShare = [UIAlertAction actionWithTitle:@"Cancel"
                                                      style:UIAlertActionStyleCancel // Set style to cancel
                                                    handler:^(UIAlertAction *action) {
                                                        // [self actionSheet:nil didDismissWithButtonIndex:2];
                                                        // Where did you create actionSheet?
                                                        // didDismissWithButtonIndex: is not neccessary
                                                        // Just simply dismiss the UIAlertController
                                                        [alertController dismissViewControllerAnimated:YES completion:nil];
                                                        NSLog(@"Cancel Button");
                                                    }];
[alertController addAction:emailShare];
[alertController addAction:smShare];
[alertController addAction:cancelShare];

[self presentViewController:alertController animated:YES completion:nil];

UIAlertController不允许点击

1 个答案: