ios - CoreBluetooth状态保存: correct way to restore CBCentralManager
<p><p>当应用由于状态保存事件而获得选项午餐时，从 AppDelegate 恢复 CBCentralManager 的正确方法是什么？</p>
<pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// The system provides the restoration identifiers only for central managers that had active or pending peripheral connections or were scanning for peripherals.
NSArray * centralManagerIdentifiers = launchOptions;
if (centralManagerIdentifiers != nil) {
for (int i=0; i<; i++) {
NSString * identifier = ;
NSLog(@"bluetooth central key identifier %@", identifier);
// here I expect to re-instatiate the CBCentralManager but not sure how and if this is the best place..
}
}
// Override point for customization after application launch.
return YES;
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>当您获得标识符列表时，您必须遍历此列表并为每个标识符初始化 <code>CBCentralManager</code> 的实例。列表包含 <code>NSString</code> 的对象。</p>
<pre><code>NSArray *centralManagerIdentifiers = launchOptions;
for (NSString *centralManagerIdentifier in centralManagerIdentifiers) {
CBCentralManager *centralManager = [ initWithDelegate:self
queue:nil
options:@{CBCentralManagerOptionRestoreIdentifierKey: centralManagerIdentifier}];
;
}
</code></pre>
<p>更多详情请引用<a href="https://developer.apple.com/library/ios/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothBackgroundProcessingForIOSApps/PerformingTasksWhileYourAppIsInTheBackground.html#//apple_ref/doc/uid/TP40013257-CH7-SW1" rel="noreferrer noopener nofollow" title="Core Bluetooth Programming Guide">State Preservation and Restoration</a>在核心蓝牙编程指南中。</p></p>
<p style="font-size: 20px;">关于ios - CoreBluetooth状态保存: correct way to restore CBCentralManager，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/33125295/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/33125295/
</a>
</p>
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