在 Appdelegate 中传递变量

Question

当我在AppDelegate 中使用变量，然后在函数中使用它时，变量不会改变它的值！

有什么帮助吗？我使用目标c

  - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
        // Show alert for push notifications recevied while the
    // app is running

    NSString *message = [[userInfo objectForKey:@"aps"]
                         objectForKey:@"alert"];


    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@""
                          message:message
                          delegate:nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil];
    [alert show];

如何在此函数之外获取消息？

Answer 1

你可以创建一个类变量：

NSString *mesage;//You can use this variable anywhere in AppDelegate

 - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
        // Show alert for push notifications recevied while the
    // app is running

    message = [[userInfo objectForKey:@"aps"]
                         objectForKey:@"alert"];


    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@""
                          message:message
                          delegate:nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil];
    [alert show];