UIAlertController

UIAlertController *alert = [UIAlertController alertControllerWithTitle:msg message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
        NSLog(@"确定");
    }]];
    [self presentViewController:alert animated:YES completion:^{
        
    }];