我想向后台的应用程序发送静默推送通知,然后获取当前用户位置并将其发送到Web服务.
我实现了推送通知方法以及这两个方法：
– (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
NSDate *fetchStart = [NSDate date];
[self sendLocationToServerWithCompletionHandler:^(UIBackgroundFetchResult result) {
completionHandler(result);
NSDate *fetchEnd = [NSDate date];
NSTimeInterval timeElapsed = [fetchEnd timeIntervalSinceDate:fetchStart];
NSLog(@”Background Fetch Duration: %f seconds”,timeElapsed);
}];
}
– (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
}
我还创建了一个将位置发送到服务器的方法：
– (void)sendLocationToServerWithCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
NSDictionary *params = @{
@”UserId” : self.userId,@”Latitude” : self.latitude,@”Longitude” : self.longitude
}
ServerManager *manager = [ServerManager sharedManager];
[manager sendLocationToServerWithCompletion:^(BOOL success) {
if (success)
{
completionHandler(UIBackgroundFetchResultNewData);
}
else
{
completionHandler(UIBackgroundFetchResultFailed);
}
}];
}
我只是无法理解它们如何一起工作,Apple会批准它,它是否可能以及位置背景获取的位置.
提前致谢.