使用Parse从一个用户向另一个用户发送推送通知

时间：2013-12-17 05:22:57

标签： ios objective-c xcode push-notification parse-platform

我已经构建了一个类似于Snapchat的消息传递应用程序 - 一个用户可以发送另一个用户图片。我正在尝试向应用添加推送通知，以便当从UserA向UserB发送消息时，UserB会收到“来自UserA的新消息”的推送通知。

我现在已经研究了几个小时了，我觉得我非常接近。

我正在尝试使用Parse发送推送通知。我希望它的工作方式如下：当UserA向UserB发送消息时，还会向UserB发送一条推送通知，其中显示“来自UserA的新消息”。我成功地使用Parse网站向使用该应用程序的设备发送推送通知，但是无法从应用程序内部成功发送推送通知（当用户发送消息时）接收用户的设备。

推送通知显然已成功发送，因为我的Parse帐户显示了我发送的消息。但是，没有消息实际到达目标设备，推送通知列表显示每个推送通知的0个订阅者。

我可以点击其中一个来查看详细信息。

此外，我正在使用分发/生产配置文件＆amp;证书。

这是我在UserA向UserB发送消息后使用发送推送通知的代码 - message对象是已上传到Parse的消息，而messageRecipients是消息的用户正被送往：

// Send Push Notification to recipients

NSArray *messageRecipients = [message objectForKey:@"recipientIds"];

PFQuery *pushQuery = [PFInstallation query];
                    [pushQuery whereKey:@"owner" containedIn:messageRecipients];

PFPush *push = [[PFPush alloc] init];
[push setQuery:pushQuery];
[push setMessage:[NSString stringWithFormat: @"New Message from %@!",  [PFUser currentUser].username]];
[push sendPushInBackground];

以下是我的AppDelegate.m相关方法：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [Parse setApplicationId:@"[This is where my app Id is]"
                  clientKey:@"[This is where client Id is]"];
    [self customizeUserInterface];
    [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert|UIRemoteNotificationTypeBadge|UIRemoteNotificationTypeSound];

    return YES;
}

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
    [PFPush storeDeviceToken:deviceToken];
    [PFPush subscribeToChannelInBackground:@""];
}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
    NSLog(@"Did fail to register for push, %@", error);
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    [PFPush handlePush:userInfo];
}

我还在Parse.com论坛上提交了一篇文章：https://parse.com/questions/sending-a-push-notification-from-one-user-to-another-user

我有什么遗漏或做错了吗？

编辑：我现在能够在我的Parse帐户中看到订阅者，但我实际上并没有在我的设备上收到推送通知。当我尝试从Parse网站发送推送通知测试时也是如此。 enter image description here

5 个答案:

答案 0 :(得分：4)

我的搜索一直回到这里，但这里没有任何内容真正拼写出来。所以这就是我的工作方式：

在我的AppDelegate.m中，我有： 

- (void)applicationDidBecomeActive:(UIApplication *)application
{

    PFUser *currentUser = [PFUser currentUser];
    if (currentUser) {
        //save the installation
        PFInstallation *currentInstallation = [PFInstallation currentInstallation];
        currentInstallation[@"installationUser"] = [[PFUser currentUser]objectId];
        // here we add a column to the installation table and store the current user’s ID
        // this way we can target specific users later

        // while we’re at it, this is a good place to reset our app’s badge count
        // you have to do this locally as well as on the parse server by updating
        // the PFInstallation object
        if (currentInstallation.badge != 0) {
            currentInstallation.badge = 0;
            [currentInstallation saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
                if (error) {
                    // Handle error here with an alert…
                }
                else {
                    // only update locally if the remote update succeeded so they always match
                    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
                    NSLog(@"updated badge");
                }
            }];
        }
    } else {

        [PFUser logOut];
        // show the signup screen here....
    }
}
在我发送推送的viewController中

：

<强> myViewController.h 

@property (nonatomic, strong) NSMutableArray *recipients; // declare the array we'll use to store our recipients

<强> myViewController.m 

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.recipients = [[NSMutableArray alloc] init]; // initialize the array we'll use to hold our recipients
}


// in another part of the code (not shown here) we set up a tableView with all of the current user's friends in it
// when the user taps a row in that tableView we add or remove the selected friend from our recipients list
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self.tableView deselectRowAtIndexPath:indexPath animated:NO];

    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
    PFUser *user = [self.friends objectAtIndex:indexPath.row];

    if (cell.accessoryType == UITableViewCellAccessoryNone) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        [self.recipients addObject:user.objectId]; //  user selected a recipient, add them to the array
    }
    else {
        cell.accessoryType = UITableViewCellAccessoryNone;
        [self.recipients removeObject:user.objectId]; //  user de-selected a recipient, remove them from the array
    }

}




- (void)uploadMessage 
{
    UIImage *newImage = [self resizeImage:self.image toWidth:640.0f andHeight:960.0f];
    NSData *fileData= UIImageJPEGRepresentation(newImage, 1.0);
    NSString *fileName= @"image.jpg";;
    NSString *fileType= @"image";

    PFFile *file = [PFFile fileWithName:fileName data:fileData];

    [file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (error) {
                // Handle error here with an alert…
        }
        else {
            PFObject *message = [PFObject objectWithClassName:@"Messages"];
            [message setObject:file forKey:@"file"];
            [message setObject:fileType forKey:@"fileType"];
            [message setObject:self.recipients forKey:@"recipientIds"];
                  // self.recipients is an NSMutableArray of the objectIds for each 
                  // user the message will go to 
            [message setObject:[[PFUser currentUser] objectId] forKey:@"senderId"];
            [message setObject:[[PFUser currentUser] username] forKey:@"senderName"];
            [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
                if (error) {
                    // Handle error here with an alert…
                }
                else {
                    // Everything was successful! Reset UI… do other stuff
                    // Here’s where we will send the push
                    //set our options
                    NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:
                                          @“Ne messages available!!”, @"alert",
                                          @"Increment", @"badge",
                                          nil];

                    // Now we’ll need to query all saved installations to find those of our recipients 
                    // Create our Installation query using the self.recipients array we already have
                    PFQuery *pushQuery = [PFInstallation query];
                    [pushQuery whereKey:@"installationUser" containedIn:self.recipients];

                    // Send push notification to our query
                    PFPush *push = [[PFPush alloc] init];
                    [push setQuery:pushQuery];
                    [push setData:data];
                    [push sendPushInBackground];
                }
            }];
        }
    }];
}

答案 1 :(得分：3)

我想我有答案。我遇到了同样的问题，我刚解决了。

当您为所有者设置值时，应使用“[PFUser currentUser] .objectId”，而不是[PFUser currentUser]。后者为您提供了一个指向所有者的指针，但我们需要一个字符串来在这种情况下设置Push查询。

当我们第一次将所有者设置为安装时，我们应该将objectId设置为字符串为owner而不是像下面的[PFUser currentUser]。

[currentInstallation setObject:[PFUser currentUser].objectId forKey:@"owner"];

稍后我们可以将所有者（字符串）设置为我们的pushQuery。

答案 2 :(得分：0)

您是否尝试将所有者存储在安装中。即

- (void)application:(UIApplication *)application
        didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{

    PFInstallation *currentInstallation = [PFInstallation currentInstallation];
    [currentInstallation setDeviceTokenFromData:deviceToken];
    [currentInstallation setObject:[PFUser currentUser] forKey:@"owner"];
    [currentInstallation saveInBackground];
}

来自：click here

答案 3 :(得分：0)

鉴于您到目前为止发布的内容，我不确定您的代码为什么不适合您。似乎您的安装表不包含“所有者”列，或者它包含“所有者”列，其值/类型不是[message objectForKey:@"recipientIds"]数组中包含的值/类型;但是，为了防止您需要/想要尝试备份方法，这是使用Parse将推送通知从一个设备发送到另一个设备的另一种方法：

首先将接收推送的用户/用户组订阅到他们自己的唯一频道（除主频道外），例如

[PFPush subscribeToChannelInBackground:taylors_channel];

然后，从发送推送的设备，将频道设置为收件人的频道：

PFPush *push = [[PFPush alloc] init];
[push setChannel:taylors_channel];
[push setMessage:[NSString stringWithFormat: @"New Message from %@!",  [PFUser currentUser].username]];
[push sendPushInBackground];

此外，您还可以为多个同伴设置相同的频道，或使用[push setChannels:channel_array]一次向多个频道发送消息;

答案 4 :(得分：0)

要详细说明djshiow的响应，请保存当前安装。

PFQuery * pushQuery = [PFInstallation query];
PFUser * userReceivingPush; 
[pushQuery whereKey:@"owner" equalTo:userReceivingPush]; 

NSString * alert = [NSString stringWithFormat:@"You have a new message from %@!", [PFUser currentUser].username];
NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:
                                  alert, @"alert",
                                  @"default", @"sound",
                                  @"Increment", @"badge",
                                  nil];
[PFPush sendPushDataToQueryInBackground:pushQuery withData:data block:^(BOOL succeeded, NSError *error) {
                if (!error) {

                }
                else {
                }
            }];
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