iOS Development-Bluetooth backend receive data (BLE4.0)

1. In the Xxx-info.plist file, create a new row Required background modes , adding the following two items.

app shares data using Corebluetooth and app communicates using Corebluetooth

:

After adding this entry, you will find that Bluetooth remains connected when the app is in the background.

However, after entering the background, although the application is still hanging, can receive data normally. However, to the data, if we need to respond in real time, it will be used to push.

That is, when the data comes, pop up a prompt box, prompting the user to come to the data.

2. Set up local push

The method here is written in APPDELEGATE.M. The receivedata corresponds to the response function that you receive the data.

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2. -(void) Receivedata: (nsdata*) Data

4. {

6. NSLog (@"received data");

10. //Receive data, set push   

12. Uilocalnotification *noti = [[Uilocalnotification alloc] init];

14. if (Noti)

16. {

18. //Set time zone   

20. Noti.timezone = [Nstimezone defaulttimezone];

22. //Set repeat Interval   

24. Noti.repeatinterval = Nsweekcalendarunit;

26. //Push sound   

28. Noti.soundname = Uilocalnotificationdefaultsoundname;

30. //Content   

32. Noti.alertbody = @"received data";

34. Noti.alertaction = @"open";

36. //The number of the red circle displayed on the icon   

38. Noti.applicationiconbadgenumber = 1;

40. //Set UserInfo to be used after subsequent revocation   

42. Nsdictionary *infodic = [nsdictionary dictionarywithobject:@"name" forkey:@"key"];

44. Noti.userinfo = Infodic;

46. //Add push to UIApplication   

48. UIApplication *app = [UIApplication sharedapplication];

50. [App Schedulelocalnotification:noti];

52. }

54. }

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2. #pragma mark-received a push

4. -(void) Application: (UIApplication *) application didreceivelocalnotification: (uilocalnotification*) Notification

6. {

8. Uialertview *alert = [[Uialertview alloc] initwithtitle:@"Call Prompt"

10. Message:notification.alertBody

12. Delegate:nil

14. cancelbuttontitle:@"Answer"

16. otherbuttontitles:@"Hang Off", nil];

18. [Alert show];

20. //Here, you can do something you want to do through notification's Useinfo .

22. Application.applicationiconbadgenumber-= 1;

24. }

iOS Development-Bluetooth backend receive data (BLE4.0)