如何在 iOS 8 中使用 UIAlertView？

Question

自 iOS8 发布以来我一直在使用 AlertView，但在 iOS8 发布后，UIAlertView 被 UIAlertViewController 取代。那么如何将它用作 UIAlertView。

Answer 1

AlertView 在 Swift 在 ios8

var alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)

Answer 2

if ([UIAlertController class])
{
    // use UIAlertController
    UIAlertController *alert= [UIAlertController
                                  alertControllerWithTitle:@"Enter Folder Name"
                                  message:@"Keep it short and sweet"
                                  preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                               handler:^(UIAlertAction * action){
                                                   //Do Some action here


                                               }];
    UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault
                                                   handler:^(UIAlertAction * action) {

                                                       NSLog(@"cancel btn");

                                                       [alert dismissViewControllerAnimated:YES completion:nil];

                                                   }];

    [alert addAction:ok];
    [alert addAction:cancel];



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

使用此代码

Answer 3

UIAlertController * myAlert=   [UIAlertController
                                alertControllerWithTitle:@"My Alert"
                                message:@"put a message here"
                                preferredStyle:UIAlertControllerStyleAlert];

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