iOS BLE 4.0 实现搜索周边蓝牙设备并显示其信号强度(RSSI)

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iOS BLE 4.0 实现搜索周边蓝牙设备并显示其信号强度(RSSI)

源码：https://git.oschina.net/laughingzhong/MyBluetoothDemo.git

[Objective-C]代码

1. #import "ViewController.h"
   
2. #import "TableViewCell.h"
   
3. #import "PeripheralViewController.h"
   
4. 
   
5. #define ScanTimeInterval 1.0
   
6. 
   
7. @interface ViewController ()
   
8. 
   
9. @property (nonatomic,strong) NSMutableArray *devicesArray;
   
10. @property (nonatomic,strong) CBCentralManager *centralManager;
    
11. @property (nonatomic,strong) CBPeripheral *selectedPeripheral;
    
12. @property (nonatomic,strong) NSTimer *scanTimer;
    
13. 
    
14. @end
    
15. 
    
16. @implementation ViewController
    
17. 
    
18. - (void)dealloc
    
19. {
    
20.     _devicesArray = nil;
    
21.     _centralManager = nil;
    
22.     _selectedPeripheral = nil;
    
23.     _scanTimer = nil;
    
24. }
    
25. 
    
26. - (void)viewDidLoad {
    
27.     [super viewDidLoad];
    
28.     // Do any additional setup after loading the view, typically from a nib.
    
29.     _devicesArray = [[NSMutableArray alloc] initWithCapacity:1];
    
30.      
    
31.     [self initWithLeftBarButton];
    
32.     [self initWithRightBarButton];
    
33.     [self initWithTableView];
    
34.     [self initWithCBCentralManager];
    
35. }
    
36. 
    
37. #pragma mark - UI
    
38. - (void)initWithLeftBarButton
    
39. {
    
40.     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    
41.     [button setFrame:CGRectMake(0.0, 0.0, 60.0, 40.0)];
    
42.     [button setBackgroundColor:[UIColor clearColor]];
    
43.     [button setTitle:@"搜索" forState:UIControlStateNormal];
    
44.     [button addTarget:self action:@selector(startScanPeripherals) forControlEvents:UIControlEventTouchUpInside];
    
45.      
    
46.     UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:button];
    
47.     [self.navigationItem setLeftBarButtonItem:item];
    
48. }
    
49. 
    
50. - (void)initWithRightBarButton
    
51. {
    
52.     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    
53.     [button setFrame:CGRectMake(0.0, 0.0, 60.0, 40.0)];
    
54.     [button setBackgroundColor:[UIColor clearColor]];
    
55.     [button setTitle:@"停止" forState:UIControlStateNormal];
    
56.     [button addTarget:self action:@selector(stopScan) forControlEvents:UIControlEventTouchUpInside];
    
57.      
    
58.     UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:button];
    
59.     [self.navigationItem setRightBarButtonItem:item];
    
60. }
    
61. 
    
62. - (void)initWithTableView
    
63. {
    
64.     if (!_tableView) {
    
65.         _tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
    
66.         [_tableView setDelegate:self];
    
67.         [_tableView setDataSource:self];
    
68.         [_tableView setBackgroundColor:[UIColor clearColor]];
    
69.         [_tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];
    
70.         [_tableView setTranslatesAutoresizingMaskIntoConstraints:NO];
    
71.     }
    
72.     if (_tableView && _tableView.superview != self.view) {
    
73.         [self.view addSubview:_tableView];
    
74.          
    
75.         NSArray *h = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_tableView]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_tableView)];
    
76.         NSArray *v = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_tableView]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_tableView)];
    
77.         [self.view addConstraints:h];
    
78.         [self.view addConstraints:v];
    
79.     }
    
80. }
    
81. 
    
82. #pragma mark - ScanTimer
    
83. - (void)startScanPeripherals
    
84. {
    
85.     if (!_scanTimer) {
    
86.         _scanTimer = [NSTimer timerWithTimeInterval:ScanTimeInterval target:self selector:@selector(scanForPeripherals) userInfo:nil repeats:YES];
    
87.         [[NSRunLoop mainRunLoop] addTimer:_scanTimer forMode:NSDefaultRunLoopMode];
    
88.     }
    
89.     if (_scanTimer && !_scanTimer.valid) {
    
90.         [_scanTimer fire];
    
91.     }
    
92. }
    
93. 
    
94. - (void)stopScan
    
95. {
    
96.     if (_scanTimer && _scanTimer.valid) {
    
97.         [_scanTimer invalidate];
    
98.         _scanTimer = nil;
    
99.     }
    
100.     [_centralManager stopScan];
     
101. }
     
102. 
     
103. #pragma mark - CBCentralManager
     
104. - (void)initWithCBCentralManager
     
105. {
     
106.     if (!_centralManager) {
     
107.         dispatch_queue_t queue = dispatch_get_main_queue();
     
108.         _centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:queue options:@{CBCentralManagerOptionShowPowerAlertKey:@YES}];
     
109.         [_centralManager setDelegate:self];
     
110.     }
     
111. }
     
112. 
     
113. - (void)scanForPeripherals
     
114. {
     
115.     if (_centralManager.state == CBCentralManagerStateUnsupported) {//设备不支持蓝牙
     
116.          
     
117.     }else {//设备支持蓝牙连接
     
118.         if (_centralManager.state == CBCentralManagerStatePoweredOn) {//蓝牙开启状态
     
119.             //[_centralManager stopScan];
     
120.             [_centralManager scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey:[NSNumber numberWithBool:NO]}];
     
121.         }
     
122.     }
     
123. }
     
124. 
     
125. - (void)connectPeripheral
     
126. {
     
127.      
     
128. }
     
129. 
     
130. - (void)didReceiveMemoryWarning {
     
131.     [super didReceiveMemoryWarning];
     
132.     // Dispose of any resources that can be recreated.
     
133. }
     
134. 
     
135. #pragma mark - UITableView Datasource && Delegate
     
136. - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
     
137. {
     
138.     return 1;
     
139. }
     
140. 
     
141. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
     
142. {
     
143.     return _devicesArray.count;
     
144. }
     
145. 
     
146. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
     
147. {
     
148.     if (section == 0) {
     
149.         return @"Peripherals Nearby";
     
150.     }else {
     
151.         return nil;
     
152.     }
     
153. }
     
154. 
     
155. - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
     
156. {
     
157.     return 50.0;
     
158. }
     
159. 
     
160. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
     
161. {
     
162.     static NSString *cellID = @"cellID";
     
163.     TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
     
164.     if (!cell) {
     
165.         cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellID];
     
166.     }
     
167.     NearbyPeripheralInfo *info = [_devicesArray objectAtIndex:indexPath.row];
     
168.     [cell setPeripheral:info];
     
169.     return cell;
     
170. }
     
171. 
     
172. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
     
173. {
     
174.     if (_centralManager.state == CBCentralManagerStateUnsupported) {//设备不支持蓝牙
     
175.          
     
176.     }else {//设备支持蓝牙连接
     
177.         if (_centralManager.state == CBCentralManagerStatePoweredOn) {//蓝牙开启状态
     
178.             //连接设备
     
179.             NearbyPeripheralInfo *info = [_devicesArray objectAtIndex:indexPath.row];
     
180.             [_centralManager connectPeripheral:info.peripheral options:@{CBConnectPeripheralOptionNotifyOnConnectionKey:@YES,CBConnectPeripheralOptionNotifyOnNotificationKey:@YES,CBConnectPeripheralOptionNotifyOnDisconnectionKey:@YES}];
     
181.         }
     
182.     }
     
183. }
     
184. 
     
185. #pragma mark - CBCentralManager Delegate
     
186. - (void)centralManagerDidUpdateState:(CBCentralManager *)central
     
187. {
     
188.     switch (central.state) {
     
189.         case CBCentralManagerStatePoweredOff:
     
190.             NSLog(@"CBCentralManagerStatePoweredOff");
     
191.             break;
     
192.         case CBCentralManagerStatePoweredOn:
     
193.             NSLog(@"CBCentralManagerStatePoweredOn");
     
194.             break;
     
195.         case CBCentralManagerStateResetting:
     
196.             NSLog(@"CBCentralManagerStateResetting");
     
197.             break;
     
198.         case CBCentralManagerStateUnauthorized:
     
199.             NSLog(@"CBCentralManagerStateUnauthorized");
     
200.             break;
     
201.         case CBCentralManagerStateUnknown:
     
202.             NSLog(@"CBCentralManagerStateUnknown");
     
203.             break;
     
204.         case CBCentralManagerStateUnsupported:
     
205.             NSLog(@"CBCentralManagerStateUnsupported");
     
206.             break;
     
207.             
     
208.         default:
     
209.             break;
     
210.     }
     
211. }
     
212. //发现蓝牙设备
     
213. - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
     
214. {
     
215. //    NSLog(@"\nperipheral is :\n%@\nadvertisementData is :\n%@\nRSSI is :%d",peripheral,advertisementData,[RSSI intValue]);
     
216.      
     
217.      
     
218.     BOOL isExist = NO;
     
219.     NearbyPeripheralInfo *info = [[NearbyPeripheralInfo alloc] init];
     
220.     info.peripheral = peripheral;
     
221.     info.advertisementData = advertisementData;
     
222.     info.RSSI = RSSI;
     
223.      
     
224.     if (_devicesArray.count == 0) {
     
225.         [_devicesArray addObject:info];
     
226.         NSIndexPath *path = [NSIndexPath indexPathForRow:0 inSection:0];
     
227.         [_tableView insertRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationFade];
     
228.     }else {
     
229.         for (int i = 0;i < _devicesArray.count;i++) {
     
230.             NearbyPeripheralInfo *originInfo = [_devicesArray objectAtIndex:i];
     
231.             CBPeripheral *per = originInfo.peripheral;
     
232.             if ([peripheral.identifier.UUIDString isEqualToString:per.identifier.UUIDString]) {
     
233.                 isExist = YES;
     
234.                 [_devicesArray replaceObjectAtIndex:i withObject:info];
     
235.                 [_tableView reloadData];
     
236.             }
     
237.         }
     
238.         if (!isExist) {
     
239.             [_devicesArray addObject:info];
     
240.             NSIndexPath *path = [NSIndexPath indexPathForRow:(_devicesArray.count - 1) inSection:0];
     
241.             [_tableView insertRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationFade];
     
242.         }
     
243.     }
     
244. }
     
245. //连接蓝牙设备成功
     
246. - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
     
247. {
     
248.     NSLog(@"%s",__FUNCTION__);
     
249.     [self stopScan];
     
250.     _selectedPeripheral = peripheral;
     
251.     PeripheralViewController *viewController = [[PeripheralViewController alloc] initWithNibName:nil bundle:nil];
     
252.     viewController.currentPeripheral = _selectedPeripheral;
     
253.     [self.navigationController pushViewController:viewController animated:YES];
     
254. }
     
255. //连接蓝牙设备失败
     
256. - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
     
257. {
     
258.     NSLog(@"%s",__FUNCTION__);
     
259. }
     
260. //断开连接
     
261. - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
     
262. {
     
263.     NSLog(@"%s",__FUNCTION__);
     
264. }
     
265. @end

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