iOS的蓝牙BLE连接到空
问题描述:
我连接到蓝牙系统http://redbearlab.com/blemini/iOS的蓝牙BLE连接到空
从服务中读取一些数据的设备,但节目服务,
我怎么能看到可用的服务此设备, 我已经使用lightblue ios app进行检查,我的设备有服务。
我可以连接到我的设备,并获得名字,
但我的服务阵列将显示为空[检查是不是null上面的应用程序]
这里我的代码
#import "MainViewController.h"
@interface MainViewController()
@property (nonatomic, retain)UILabel *deviceName;
@property (nonatomic, retain)UILabel *deviceUUID;
@property (nonatomic, retain)UILabel *deviceConnected;
@end
@implementation MainViewController
- (void)dealloc
{
[_deviceName release];
[_deviceUUID release];
[_deviceConnected release];
[super dealloc];
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self initUI];
self.view.backgroundColor = [UIColor lightGrayColor];
NSLog(@"mgmt");
self.manager = [[CBCentralManager alloc]initWithDelegate:self queue:nil];
}
- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
NSLog(@"centralManagerDidUpdateState");
switch (central.state) {
case CBCentralManagerStatePoweredOn:
// Scans for any peripheral
[self.manager scanForPeripheralsWithServices:nil options:nil];
break;
default:
NSLog(@"Central Manager did change state");
break;
}
}
// device discovered
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
NSLog (@"Discovered peripheral: %@", [peripheral name]);
NSLog (@"UUID peripheral: %@", [peripheral UUID]);
NSLog (@"peripheral services: %@", [peripheral services]);
self.deviceName.text = [NSString stringWithFormat:@"Device Name: %@", [peripheral name]];
self.deviceUUID.text = [NSString stringWithFormat:@"Device UUID: %@",[peripheral UUID]];
[self.manager connectPeripheral:peripheral options:nil];
}
//scan for peripherals
- (int) scanForPeripherals {
NSLog(@"scanForPeripherals");
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO], CBCentralManagerScanOptionAllowDuplicatesKey, nil];
[self.manager scanForPeripheralsWithServices:nil options:options];
return 0;
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
NSLog(@"Central Manager didConnectPeripheral");
self.deviceConnected.text = @"Device Connected: YES";
NSLog (@"UUID services: %@", [peripheral services]);
// Clears the data that we may already have
[self.data setLength:0];
// Sets the peripheral delegate
[self.activePeripheral setDelegate:self];
// Asks the peripheral to discover the service
//test! direct
CBUUID *serviceUUID = [CBUUID UUIDWithString:@"D298E274-3CB0-2C5F-A0B0-A90D97304453"];
NSArray *serviceArray = [NSArray arrayWithObjects:serviceUUID, nil];
[self.activePeripheral discoverServices:serviceArray];
}
- (void)peripheral:(CBPeripheral *)aPeripheral didDiscoverServices:(NSError *)error {
NSLog(@"didDiscoverServices");
if (error) {
NSLog(@"Error discovering service: %@", [error localizedDescription]);
//[self cleanup];
return;
}
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {
NSLog(@"didDiscoverCharacteristicsForService");
if (error) {
NSLog(@"Error discovering characteristic: %@", [error localizedDescription]);
//[self cleanup];
return;
}
}
//
- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
NSLog(@"didUpdateNotificationStateForCharacteristic");
if (error) {
NSLog(@"Error changing notification state: %@", error.localizedDescription);
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
所以请咨询为什么我的服务数组为空? 以及如何访问它以“阅读”谢谢!
答
您必须将您的属性self.activePeripheral设置为您在didDiscoverPeripheral中获得的外围设备。你的代码正在为一个无效的外设发现服务,这就是为什么你没有得到服务。
尝试:'[self.activePeripheral discoverServices:nil]'发现所有服务。 然后在'didDiscoverServices'中,NSLog将外围服务。 其他可能性:在iDevice上重新启动/关闭蓝牙iDevice/Sensor Switch。有时我的应用不想发现服务。它只是卡住了。不知道为什么。 – Larme 2013-04-24 09:46:18