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我正在尝试使用Link-OS SDK使用XCode for iOS中的GraphicsUtil类将图像发送到Zebra iMZ320打印机.

-(void)printImage:(UIImage *)image{

    NSString *serialNumber = @"";
    EAAccessoryManager *sam = [EAAccessoryManager sharedAccessoryManager];
    NSArray * connectedAccessories = [sam connectedAccessories];
    for (EAAccessory *accessory in connectedAccessories) {
        if([accessory.protocolStrings indexOfObject:@"com.zebra.rawport"] != NSNotFound){
            serialNumber = accessory.serialNumber;
            break;
        }
    }
    self.connection = [[MfiBtPrinterConnection alloc] initWithSerialNumber:serialNumber];
    NSError *error = nil;

    BOOL success = [self.connection open];

    self.printer = [ZebraPrinterFactory getInstance:self.connection error:&error];

    //Set the device language to zpl or the image prints its HEX value
    [SGD SET:@"device.languages" withValue:@"zpl" andWithPrinterConnection:self.connection error:&error];

    id<GraphicsUtil, NSObject> graphicsUtil = [self.printer …