在我目前的项目中,我有一个推送通知.当我点击应用程序图标时,我想从启动选项对象获取收到的通知,但它总是返回nil:
NSDictionary *userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
解决方法
您无法检测到这种情况,因为应用程序未使用推送通知打开(它已通过应用程序图标打开).
尝试通过滑动推送通知打开应用程序.
尝试通过滑动推送通知打开应用程序.
编辑:
如果您希望调用推送通知(通过后台获取,当您的应用程序未处于活动状态时),您需要让后端开发人员在推送通知中设置“content-available”:1.
之后-application:didReceiveRemoteNotification:fetchCompletionHandler:将被调用(当推送通知到达时),因此您可以将有效负载保存到文件中,然后当应用程序打开时,您可以读取文件并执行操作.
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler { NSLog(@"#BACKGROUND FETCH CALLED: %@",userInfo); // When we get a push,just writing it to file NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); Nsstring *documentsDirectory = [paths objectAtIndex:0]; Nsstring *filePath = [documentsDirectory stringByAppendingPathComponent:@"userInfo.plist"]; [userInfo writetoFile:filePath atomically:YES]; completionHandler(UIBackgroundFetchResultNewData); } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Checking if application was launched by tapping icon,or push notification if (!launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey]) { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,YES); Nsstring *documentsDirectory = [paths objectAtIndex:0]; Nsstring *filePath = [documentsDirectory stringByAppendingPathComponent:@"userInfo.plist"]; [[NSFileManager defaultManager] removeItemAtPath:filePath error:nil]; NSDictionary *info = [NSDictionary dictionaryWithContentsOfFile:filePath]; if (info) { // Launched by tapping icon // ... your handling here } } else { NSDictionary *info = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey]; // Launched with swiping // ... your handling here } return YES; }
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