我正在以前使用 MFi 设备的项目中使用 BLE。目标是实现一种串行连接。
使用 EAaccessory，我有一个弹出框，要求连接设备并且工作正常。
使用 CB，我添加了一个视图，我调用它来扫描并选择要连接的设备。我可以很好地连接设备，但是当我返回主视图时，我失去了与外围设备的连接。
CoreBluetooth[WARNING] <CBConcretePeripheral: ... IsConnected = YES> is being dealloc'ed while connected
所以，由于我不是天才，也不是优秀的 iOs 程序员……有人能指出我正确的方向，将连接的外围设备从一个视图保留到主视图吗？
我试图了解我项目中 BT 设备制造商 ConnectBlue 的示例，但他们使用 Storyboard，而我没有。使用他们的演示，我可以在主视图上连接到外围设备并在另一个视图上与它聊天。
我试图谷歌，但没有发现任何相关的。
编辑：连接代码部分
#import "ScanTableViewController.h"
#import <CoreBluetooth/CBCentralManager.h>
#import <CoreBluetooth/CBPeripheral.h>
#import "DiscoveredPeripheral.h"
#import "ScanCell.h"
typedef enum
{
SCAN_S_NOT_LOADED,
SCAN_S_DISAPPEARED,
SCAN_S_WILL_DISAPPEAR,
SCAN_S_APPEARED_IDLE,
SCAN_S_APPEARED_SCANNING
} SCAN_State;
@interface ScanTableViewController ()
@end
@implementation ScanTableViewController
{
SCAN_State state;
CBCentralManager *cbCentralManager;
NSMutableArray *discoveredPeripherals;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(@"Scan viewDidLoad");
cbCentralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
// Do any additional setup after loading the view from its nib.
CGRect tableViewFrame = self.view.bounds;
UITableView *tableview = [[UITableView alloc] initWithFrame:tableViewFrame style:UITableViewStylePlain];
self.myTableView = tableview;
self.myTableView.rowHeight = 60;
self.myTableView.dataSource = self;
self.myTableView.delegate = self;
//Make sure our table view resizes correctly
self.myTableView.autoresizingMask =
UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleHeight;
[self.view addSubview:tableview];
discoveredPeripherals = [[NSMutableArray alloc] init];
//[cbCentralManager retrieveConnectedPeripherals];
state = SCAN_S_DISAPPEARED;
}
- (void)viewDidUnload
{
//[self setScanButton:nil];
[super viewDidUnload];
NSLog(@"Scan viewDidUnload");
cbCentralManager = nil;
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
state = SCAN_S_NOT_LOADED;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSLog(@"Scan viewWillAppear");
[self.myTableView reloadData];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
NSLog(@"Scan viewDidAppear");
[self clearPeriph];
state = SCAN_S_APPEARED_IDLE;
[self.myTableView reloadData];
}
- (void)viewWillDisappear:(BOOL)animated
{
NSLog(@"Scan viewWillDisappear");
//[self scan: FALSE];
state = SCAN_S_WILL_DISAPPEAR;
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
NSLog(@"Scan viewDidDisappear");
state = SCAN_S_DISAPPEARED;
}
-(void) enterForeground
{
NSLog(@"Scan enterForeground");
[self clearPeriph];
state = SCAN_S_APPEARED_IDLE;
}
-(void) enterBackground
{
NSLog(@"Scan enterBackground");
[self scan: FALSE];
state = SCAN_S_DISAPPEARED;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) initWithPeripherals: (NSMutableArray*) dp
{
NSLog(@"Scan initWithPeripherals");
discoveredPeripherals = dp;
state = SCAN_S_NOT_LOADED;
}
#pragma mark - Table view data source
// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
//NSLog(@"Nombre de sections");
return 2;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
NSInteger nRows;
switch(section)
{
case 0:
nRows = 1;
break;
case 1:
NSLog(@"Scan Nbre ligne section 1 : %i",discoveredPeripherals.count);
nRows = discoveredPeripherals.count;
break;
default:
nRows = 0;
break;
}
return nRows;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(@"Remplissage");
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] ;
cell.accessoryType=UITableViewCellAccessoryDetailDisclosureButton;
}
NSLog(@"Scan Section table:%u",indexPath.section);
switch(indexPath.section)
{
case 0:
{
cell.textLabel.text = @"";
if(state == SCAN_S_APPEARED_SCANNING)
{
cell.textLabel.text = @"Stop Scan";
//cell.labelInfo.text = @"Active";
//[cell.activityView startAnimating];
}
else
{
cell.textLabel.text = @"Start Scan";
//cell.labelInfo.text = @"Inactive";
//
//[cell.activityView stopAnimating];
}
break;
}
case 1:
{
if ( [discoveredPeripherals count] > 0)
{
DiscoveredPeripheral* discoveredPeripheral;
discoveredPeripheral = [discoveredPeripherals objectAtIndex:indexPath.row];
cell.textLabel.text =discoveredPeripheral.peripheral.name;
}
cell.detailTextLabel.textColor = [UIColor blackColor];
}
}
return cell;
}
- (NSString*) tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *str;
switch(section)
{
case 0:
str = @"Bluetooth Low Energy Scanning";
break;
case 1:
str = @"Found Devices";
break;
default:
break;
}
return str;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(cbCentralManager.state == CBCentralManagerStatePoweredOn)
{
//ScanCell* cell = (ScanCell*)[tableView cellForRowAtIndexPath:indexPath];
//static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if(indexPath.section == 0)
{
if(state == SCAN_S_APPEARED_SCANNING)
{
[self scan: FALSE];
cell.textLabel.text = @"Start Scan";
//cell.labelInfo.text = @"Inactive";
//[cell.activityView stopAnimating];
state = SCAN_S_APPEARED_IDLE;
}
else if((state == SCAN_S_APPEARED_IDLE) &&
(cbCentralManager.state == CBCentralManagerStatePoweredOn))
{
[self scan: TRUE];
cell.textLabel.text = @"Stop Scan";
//cell.labelInfo.text = @"Active";
//[cell.activityView startAnimating];
state = SCAN_S_APPEARED_SCANNING;
}
}
else
{
DiscoveredPeripheral* dp = [discoveredPeripherals objectAtIndex:indexPath.row];
NSDictionary *dictionary;
switch (dp.state)
{
case DP_STATE_IDLE:
cell.textLabel.text = @"Connecting";
//[cell.activityView startAnimating];
dictionary = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:1] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey];
[cbCentralManager connectPeripheral:dp.peripheral options:dictionary];
dp.state = DP_STATE_CONNECTING;
break;
case DP_STATE_CONNECTED:
case DP_STATE_CONNECTING:
[cbCentralManager cancelPeripheralConnection:dp.peripheral];
cell.textLabel.text = @"";
//[cell.activityView stopAnimating];
cell.accessoryType = UITableViewCellAccessoryNone;
dp.state = DP_STATE_IDLE;
break;
default:
break;
}
}
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
}
- (void) scan: (bool) enable
{
if(enable == TRUE)
{
NSLog(@"Scan Scan ON");
NSDictionary *dictionary = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:1] forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
[cbCentralManager scanForPeripheralsWithServices:nil options:dictionary];
}
else
{
NSLog(@"Scan Scan Off");
[cbCentralManager stopScan];
}
}
- (IBAction)startScan:(id)sender {
if(state == SCAN_S_APPEARED_IDLE)
{
[self scan: TRUE];
state = SCAN_S_APPEARED_SCANNING;
}
else if(state == SCAN_S_APPEARED_SCANNING)
{
[self scan: FALSE];
state = SCAN_S_APPEARED_IDLE;
}
}
- (void) clearPeriphForRow: (NSInteger)row
{
DiscoveredPeripheral* dp = [discoveredPeripherals objectAtIndex:row];
//if( (dp.peripheral.isConnected == FALSE) &&
// ( (dp.state == DP_STATE_CONNECTED) || (dp.state == DP_STATE_DISCONNECTING)))
if(dp.peripheral.isConnected == FALSE)
{
dp.state = DP_STATE_IDLE;
}
else if( (dp.peripheral.isConnected == TRUE) &&
(dp.state != DP_STATE_CONNECTED))
{
dp.state = DP_STATE_CONNECTED;
}
if(dp.state == DP_STATE_IDLE)
{
[discoveredPeripherals removeObjectAtIndex:row];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:1];
//ScanCell* cell = (ScanCell*)[self.tableView cellForRowAtIndexPath:indexPath];
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
//[cell.activityView stopAnimating];
cell.accessoryType = UITableViewCellAccessoryNone;
[self.myTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
- (void) clearPeriph
{
if(self->discoveredPeripherals.count > 0)
{
for(int i = discoveredPeripherals.count - 1; i >= 0 ; i--)
{
[self clearPeriphForRow:i];
}
}
[self.myTableView reloadData];
}
- (IBAction)clearPeripherals:(id)sender {
[self clearPeriph];
[self scan: FALSE];
state = SCAN_S_APPEARED_IDLE;
}
- (NSInteger)getRowForPeripheral: (CBPeripheral*)peripheral
{
NSInteger row = -1;
DiscoveredPeripheral* p;
for(int i = 0; (i < discoveredPeripherals.count) && (row == -1); i++)
{
p = [discoveredPeripherals objectAtIndex:i];
if([peripheral isEqual:p.peripheral] == TRUE)
{
row = i;
}
}
return row;
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
NSInteger row = [self getRowForPeripheral:peripheral];
if(row != -1)
{
NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:1];
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
//ScanCell* cell = (ScanCell*)[self.tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.text = [[NSString alloc] initWithFormat:@"Connected"];
//[cell.activityView stopAnimating];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
DiscoveredPeripheral* dp = [discoveredPeripherals objectAtIndex:row];
dp.state = DP_STATE_CONNECTED;
//[peripheral discoverServices:nil];
//[self scan:FALSE];
//[[self navigationController] popViewControllerAnimated:NO];
//[self.delegate didConnectedPeriph:dp];
}
}
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
NSInteger row = [self getRowForPeripheral:peripheral];
if(row != -1)
{
NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:1];
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
//ScanCell* cell = (ScanCell*)[self.tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.text = [[NSString alloc] initWithFormat:@""];
cell.accessoryType = UITableViewCellAccessoryNone;
//[cell.activityView stopAnimating];
DiscoveredPeripheral* dp = [discoveredPeripherals objectAtIndex:row];
dp.state = DP_STATE_IDLE;
}
}
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
bool new = TRUE;
DiscoveredPeripheral* discPeripheral;
int row = -1;
if((state == SCAN_S_APPEARED_SCANNING) &&
(peripheral != nil))
{
for(int i = 0; (i < discoveredPeripherals.count) && (new == TRUE); i++)
{
NSLog(@"Scan Ajout periph");
discPeripheral = [discoveredPeripherals objectAtIndex:i];
if(discPeripheral.peripheral == peripheral)
{
new = false;
row = i;
discPeripheral.peripheral = peripheral;
}
}
if(new == TRUE)
{
discPeripheral = [[DiscoveredPeripheral alloc] initWithPeripheral:peripheral andAdvertisment:advertisementData andRssi:RSSI];
discPeripheral.rssi = RSSI;
if(peripheral.isConnected == TRUE)
{
discPeripheral.state = DP_STATE_CONNECTED;
}
[discoveredPeripherals addObject:discPeripheral];
NSLog(@"Scan Ajout periph, total:%i",[discoveredPeripherals count]);
NSLog(@"Scan %i: Add %@",[discoveredPeripherals count]-1, discPeripheral.peripheral.name);
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[discoveredPeripherals count]-1 inSection:1];
NSLog(@"Scan Nouveau periph, index:%i, section:%i",indexPath.row,indexPath.section);
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
cell.textLabel.text = discPeripheral.peripheral.name;
//[self.tableView insertRowsAtIndexPaths: [NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[self.myTableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
else
{
discPeripheral.peripheral = peripheral;
discPeripheral.advertisment = advertisementData;
discPeripheral.rssi = RSSI;
NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:1];
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
//ScanCell* cell = (ScanCell*)[self.tableView cellForRowAtIndexPath:indexPath];
//NSLog(@"%i: Update %@", row, discPeripheral.peripheral.name);
cell.textLabel.text = discPeripheral.peripheral.name;
//cell.labelInfo.text = [[NSString alloc] initWithFormat:@"RSSI: %@", discPeripheral.rssi];
}
}
}
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
NSInteger row = [self getRowForPeripheral:peripheral];
if(row != -1)
{
NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:1];
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
//ScanCell* cell = (ScanCell*)[self.tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.text = [[NSString alloc] initWithFormat:@""];
cell.accessoryType = UITableViewCellAccessoryNone;
//[cell.activityView stopAnimating];
DiscoveredPeripheral* dp = [discoveredPeripherals objectAtIndex:row];
dp.state = DP_STATE_IDLE;
}
}
- (void)centralManager:(CBCentralManager *)central didRetrieveConnectedPeripherals:(NSArray *)peripherals
{
//DiscoveredPeripheral* discPeripheral;
CBPeripheral* peripheral;
for(int i = 0; i < peripherals.count; i++)
{
peripheral = [peripherals objectAtIndex:i];
/*
discPeripheral = [[DiscoveredPeripheral alloc] initWithPeripheral:peripheral andAdvertisment:nil andRssi:nil];
if(peripheral.isConnected == TRUE)
{
discPeripheral.state = DP_STATE_CONNECTED;
}
[discoveredPeripherals addObject:discPeripheral];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[discoveredPeripherals count] - 1 inSection:1];
[self.tableView insertRowsAtIndexPaths: [NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
*/
//[cbCentralManager cancelPeripheralConnection:peripheral];
NSDictionary *dictionary;
dictionary = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:1] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey];
[cbCentralManager connectPeripheral:peripheral options:dictionary];
}
}
- (void)centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals
{
}
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
//NSLog(@"Central Manager State: %d", [central state]);
if(central.state == CBCentralManagerStatePoweredOn)
{
[cbCentralManager retrieveConnectedPeripherals];
}
}
@end
编辑：这个视图是从视图控制器调用的。视图控制器从蓝牙接收数据，记录并显示数据。我想要实现的是有一个单独的视图来连接到 BLE 外围设备，回到主视图，连接串口并运行。第二次，如果外围设备丢失，请尝试重新连接，否则弹出连接视图并提醒用户。
干杯。
塞德里克