最近时间一直在研究ibeacon所以把自己遇到的一些问题写下来做个笔记。
参考资料:https://github.com/nixzhu/dev-blog/blob/master/2014-04-23-ios7-ibeacons-tutorial.md
iBeacon是苹果被允许能在后台运行的,不论你将应用退出到后台还是杀死,iBeacon都能激活应用不过只能激活10秒左右,但是这段时间足可以做很多事情了。
开始监听你的Ibeacon。
在iOS8里面苹果改变了地位的开启方式(iBeacon的使用是基于蓝牙和定位的),首先要在工程里的info.plist增加字段NSLocationAlwaysUsageDescription(这个是允许一直在后台运行的)
接着在程序里添加
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
if (status == kCLAuthorizationStatusAuthorizedAlways) {
[self.locationmanager startMonitoringForRegion:self.beacon1];
}
}
.h文件
#import<UIKit/UIKit.h>
#import<CoreLocation/CoreLocation.h>
#import<CoreLocation/CoreLocation.h>
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate,CLLocationManagerDelegate,>
@property (nonatomic, strong) NSArray *beaconArr;//存放扫描到的iBeacon
@property (strong, nonatomic) CLBeaconRegion *beacon1;//被扫描的iBeacon
@property (strong, nonatomic) CLLocationManager * locationmanager;
@end,,,
.m文件
#define BEACONUUID @"12334566-7173-4889-9579-954995439125"//iBeacon的uuid可以换成自己设备的uuid
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 20, 320, 400)];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview:self.tableView];
self.beaconArr = [[NSArray alloc] init];
self.locationmanager = [[CLLocationManager alloc] init];//初始化
self.locationmanager.delegate = self;
self.beacon1 = [[CLBeaconRegion alloc] initWithProximityUUID:[[NSUUID alloc] initWithUUIDString:BEACONUUID] identifier:@"media"];//初始化监测的iBeacon信息
[self.locationmanager requestAlwaysAuthorization];//设置location是一直允许
}
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{
if (status == kCLAuthorizationStatusAuthorizedAlways) {
[self.locationmanager startMonitoringForRegion:self.beacon1];//开始MonitoringiBeacon
}
}
{
//发现有iBeacon进入监测范围
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
[self.locationmanager startRangingBeaconsInRegion:self.beacon1];//开始RegionBeacons
}
//找的iBeacon后扫描它的信息
- (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region{
//如果存在不是我们要监测的iBeacon那就停止扫描他
if (![[region.proximityUUID UUIDString] isEqualToString:BEACONUUID]){
[self.locationmanager stopMonitoringForRegion:region];
[self.locationmanager stopRangingBeaconsInRegion:region];
}
//打印所有iBeacon的信息
for (CLBeacon* beacon in beacons) {
NSLog(@"rssi is :%ld",beacon.rssi);
NSLog(@"beacon.proximity %ld",beacon.proximity);
......
}
self.beaconArr = beacons;
[self.tableView reloadData];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.beaconArr.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *ident = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ident];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ident];
}
CLBeacon *beacon = [self.beaconArr objectAtIndex:indexPath.row];
cell.textLabel.text = [beacon.proximityUUID UUIDString];
NSString *str;
switch (beacon.proximity) {
case CLProximityNear:
str = @"近";
break;
case CLProximityImmediate:
str = @"超近";
break;
case CLProximityFar:
str = @"远";
break;
case CLProximityUnknown:
str = @"不见了";
break;
default:
break;
}
cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ %ld %@ %@",str,beacon.rssi,beacon.major,beacon.minor];
return cell;
}
uuid唯一标识此类iBeacon。
proximity远近范围的,有Near(在几米内),Immediate(在几厘米内),Far(超过 10 米以外,不过在测试中超不过10米就是far),Unknown(无效)
major和minor组合后区分同一类型下的iBeacon。
accuracy和iBeacon的距离
rssi信号轻度为负值,越接近0信号越强,等于0时无法获取信号强度
当进入iBeacon范围是会触发didEnterRegion方法,此时可能获取不到iBeacon的rssi ,proximity,accuracy值因为距离有点远,所一要在此时做些动作和这三个参数有关的话需要小心。