客观C- BLE设备制造商数据比较 [英] Objective C- BLE device Manufacturers data comparison

问题描述

我的任务是将制造商的数据与字符串进行比较以显示BLE设备.

I have a task of comparing Manufacturers data to a string to display the BLE devices .

-(void)centralManager:(CBCentralManager *):didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSString *manufac=[advertisementData objectForKey:CBAdvertisementDataManufacturerDataKey];
    NSString *string=@"57394423 4334445 55";
    if([string isEqualToString:manufac])
       NSLog(@"yes it is the device");
    else
       NSLog(@"sorry not a device");
}

"manufac"在打印时给出的结果为< 57394423 4334445 55>，该结果在任何时候都不能证明是正确的. 怎么可以比较?请帮忙.

'manufac' when printed gives result as <57394423 4334445 55> which doesnot prove to be correct at any time. How can it be compared ? please help.

推荐答案

CBAdvertisementDataManufacturerDataKey返回的对象是NSData对象. 您正在将其分配给错误的NSString对象.

The object returned by the CBAdvertisementDataManufacturerDataKey is an NSData object. You are assigning it to an NSString object which is wrong.

要获取UUID，您可以执行以下操作:

To get the UUID you could do the following:

NSData *manufacturer = [advertisementData objectForKey:CBAdvertisementDataManufacturerDataKey];
NSUUID *uuid = [[NSUUID alloc] initWithUUIDBytes:manufacturer.bytes];

然后将该UUID与您要搜索的UUID进行比较.如果需要实际的NSString表示形式，请使用uuid.UUIDString.

And then compare this UUID to the one you are searching for. If you need an actual NSString representation, use uuid.UUIDString.

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