ios - CoreBluetooth discover pheriperal advertisementData format -


i'm using corebluetooth discover ble device. in 

- (void)centralmanager:(cbcentralmanager *)central  diddiscoverperipheral:(cbperipheral *)peripheral      advertisementdata:(nsdictionary *)advertisementdata                   rssi:(nsnumber *)rssi

i receive advertisementdata dictionary

{     kcbadvdataisconnectable = 1;     kcbadvdatalocalname = "gate_02";     kcbadvdatamanufacturerdata = <00ff0102 0303>; }

if try read advertisementdata[@"kcbadvdatamanufacturerdata"] class obtain _nsinlinedata. how can convert nsstring or nsdata object ?

nsinlinedata is nsdata. more specifically, (private) subclass of nsdata - common pattern in cocoa, called class cluster.

so can use methods of nsdata on instance of nsinlinedata.

i'm not sure mean "converting nsdata nsstring". value of kcbadvdatamanufacturerdata not nsstring (as first byte 0x00, used terminate string).

if want convert hexadecimal data decimal, there's no need convert nsstring first. can iterate on nsdata byte-by-byte, this:

  for(nsuinteger = 0; < data.length; ++i) {     byte byte = 0;     [data getbytes:&byte range:nsmakerange(i, 1)];     //do byte }

Comments

Post a Comment

Popular posts from this blog

php - failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request -

this code i'm using find latitude , longitude of place: function coords($address){ echo $url="http://maps.googleapis.com/maps/api/geocode/json?address=".$address; $json = file_get_contents(urlencode($url)); $data = json_decode($json, true); print_r($data['results'][0]['geometry']['location']['lat']); print_r($data['results'][0]['geometry']['location']['lng']); } however returns warning: failed open stream: http request failed! http/1.0 400 bad request if use above code in simple procedure works fine not in function. note: have tried curl_init()... method produced same result? instead of encoding whole url encode address part. following code work fine $add='jamshoro phase 2'; $url="http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($add); $json = file_get_contents($url); $data = json_decode($json, true); print_r($data['r
Read more

java - How to filter a backspace keyboard input -

i have code gives message when key number pressed: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochararray().length - 1]; if (!(ch >= '0' && ch <= '9')) { system.out.println("the char entered not number"); t.consume(); } } }); now if press on wrong button , press backspace remove it, error message. how can add backspace input if statement? i have found answer: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochar
Read more

java - Show Soft Keyboard when EditText Appears -

i have code in android app, alert dialog , keyboard, , when dialog shown want keyboard appear. not , not sure why? here code: final alertdialog.builder alert = new alertdialog.builder(this); alert.settitle("title"); alert.setmessage("message"); final edittext input = new edittext(this); input.setinputtype(inputtype.type_class_number); alert.setview(input); input.setonfocuschangelistener(new view.onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus) { log.i(tag, "in focus"); inputmethodmanager inputmethodmanager = (inputmethodmanager) getsystemservice(context.input_method_service); inputmethodmanager.showsoftinput(input, inputmethodmanager.show_implicit); } } }); but keyboard not appear though edit text in focus, , tell appear why, doesn't come up? thanks in advance.
Read more