ios - Firebase how to get NSDictionary data -


i data in user profile, i've got info got stuck @ one.

firebase database: enter image description here

here of code:

self.ref.child("users").child("profile").observe(.childadded, with: { (snapshot) in           if let dictionary = snapshot.value as? [string:any] {              let user = user()              let brands = dictionary["status"] as! nsdictionary               user.displayname = dictionary["displayname"] as? string             user.isconnected = brands["isconnected"] as? string              print(user.isconnected) //fatal error: unexpectedly found nil while unwrapping optional value   class user: nsobject {     var displayname: string?     var isconnected: string? }

try :

guard let dictionary = snapshot.value as? [string: any] else {     return }  guard let statusdictionary = dictionary["status"] as? [string: any] else {     return }  guard let devicestatusdictionary = statusdictionary["device_key"] as? [string: any] else {     return }  let user = user()  user.displayname = dictionary["displayname"] as? string user.isconnected = devicestatusdictionary["isconnected"] as? bool

you need know device key.

and :

class user: nsobject {     var displayname: string?     var isconnected: bool? }

Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more