在iOS中配置弹出窗口

我想向用户显示一条弹出消息，但是我在查找文档时遇到了问题

以下是如何创建警报：

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Wait" message:@"Are you sure you want to delete this.  This action cannot be undone" delegate:self cancelButtonTitle:@"Delete" otherButtonTitles:@"Cancel", nil];
[alert show];

我如何创建一个只显示以下内容的弹出窗口：

"Thanks for signing up!"
[ OK ]

在iOS 8之前使用UIAlertView

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil 
                                                message:@"Thanks for signing up" 
                                               delegate:self 
                                      cancelButtonTitle:nil 
                                      otherButtonTitles:@"OK", nil];
[alert show];

确保添加UIAlertViewDelegate。可以找到UIAlertView的文档，使用UIAlertController发布iOS 8

UIAlertController * alert=   [UIAlertController alertControllerWithTitle:nil
                                                                 message:@"Thanks for signing up"
                                                          preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK"
                                             style:UIAlertActionStyleDefault
                                           handler:^(UIAlertAction * action) {
                                               //Do some thing here
                                               [view dismissViewControllerAnimated:YES completion:nil];
                                           }];
[alert addAction:ok];

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

---

可以在UIAlertController文档中找到

这样做很容易

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Thanks for signing up!" message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];

---

你在哪个iOS版本上做这个？在iOS8中，UIAlertView已被弃用，取而代之的是UIAlertController，请尝试搜索该视图。

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Thanks for signing up!" message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];