应用关闭时从通知中显示 UIAlertView 的问题

Posted 2023-02-23

【中文标题】应用关闭时从通知中显示 UIAlertView 的问题

【英文标题】：Problems displaying UIAlertView from notification when app is closed

【发布时间】：2014-09-15 00:06:21

【问题描述】：

我有以下用于推送通知的代码：

位于我的 appdelegate.m 中的是以下代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

// Override point for customization after application launch.

//Register to receive notifcations
//-- Set Notification
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];

else

    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];


[Pushbots getInstance];

NSDictionary * userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if(userInfo) 
    // Notification Message
    NSString* notificationMsg = [userInfo valueForKey:@"message"];
    // Custom Field
    NSString* title = [userInfo valueForKey:@"title"];
    NSLog(@"Notification Msg is %@ and Custom field title = %@", notificationMsg , title);


return YES;


-(void)onReceivePushNotification:(NSDictionary *) pushDict andPayload:(NSDictionary *)payload 
[payload valueForKey:@"title"];
UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"New Alert !" message:[pushDict valueForKey:@"alert"] delegate:self cancelButtonTitle:@"Thanks !" otherButtonTitles: @"Open",nil];
[message show];

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:@"Open"]) 
    [[Pushbots getInstance] OpenedNotification];
    // set Badge to 0
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
    // reset badge on the server
    [[Pushbots getInstance] resetBadgeCount];

当应用程序未关闭时，此代码可以正常工作，它会向我显示通知警报视图。

但是，当应用程序完全关闭且不在后台运行时，它无法正常工作。

我不知道该怎么办！

提前谢谢？

【问题讨论】：

当应用未运行或不在后台时代码如何执行？

【参考方案1】：

你不能，因为显示警报视图需要通知调用你的代码的某些部分，但是你的代码的入口点，即你可以首先处理与你的通知有关的任何事情的地方

(BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary)launchOptions

这意味着您的应用必须处于唤醒状态才能显示自定义警报视图。

现在你必须适应 ios 给你的默认实现，即顶部的通知栏。

希望有用