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;
}
