Question

我使用Nearby来检测信标。这是我的代码

- (void)viewDidLoad {
[super viewDidLoad];

[self setup];
[self startScanning];
}

-(void)setup {

[GNSMessageManager setDebugLoggingEnabled:YES];

void (^paramsBlock)(GNSMessageManagerParams *) = ^(GNSMessageManagerParams *params) {
    params.bluetoothPermissionErrorHandler = ^(BOOL hasError) {
        if (hasError) {
            NSLog(@"Nearby works better if Bluetooth use is allowed");
        }
    };
    params.bluetoothPowerErrorHandler = ^(BOOL hasError) {
        if (hasError) {
            NSLog(@"Nearby works better if Bluetooth is turned on");
        }
    };
};
_messageManager = [[GNSMessageManager alloc] initWithAPIKey:@"API-KEY" paramsBlock: paramsBlock]; 
}


- (void)startScanning {

// Create a subscription that scans for nearby beacons.
NSString *(^stringFromData)(NSData *) = ^(NSData *content) {
    return [[NSString alloc] initWithData:content encoding:NSUTF8StringEncoding];
};
GNSBeaconStrategy *beaconScanStrategy =
[GNSBeaconStrategy strategyWithParamsBlock:^(GNSBeaconStrategyParams *params) {
    params.includeIBeacons = NO;

}];
GNSMessageHandler messageFoundHandler = ^(GNSMessage *message) {

};
GNSMessageHandler messageLostHandler = ^(GNSMessage *message) {

};
_subscription = [_messageManager
                 subscriptionWithMessageFoundHandler:messageFoundHandler
                 messageLostHandler:messageLostHandler
                 paramsBlock:^(GNSSubscriptionParams *params) {
                     params.deviceTypesToDiscover = kGNSDeviceBLEBeacon;
                     params.beaconStrategy = beaconScanStrategy;
                     }];
}

Beacon被正确检测到，但是每隔5分钟就会在附近调用messageLostHandler方法并且：

当不再观察到消息（设备超出范围或不再发布消息）时，将调用消息丢失处理程序。

来源：https://developers.google.com/nearby/messages/ios/pub-sub

有人可以告诉我为什么每5分钟调用一次这个方法吗？我不得不说灯塔和设备停留在同一个地方，所以我仍然在灯塔区域。其余的附近功能工作正常。

这对我来说非常重要，因为当附近检测到信标时，我会连接到他并做出另一个动作。有人有一些想法吗？

每5分钟附近发送一次messageLostHandler事件

0 个答案: