Getting values of property objects in Objective-C

Question

This question is trivial but I have no idea how to do it

I have this swift code

... = XYZ.auth().currentUser;

... = XYZ.auth().currentUser.phoneNumber;

I want to convert this Swift code to Objective-C code , I want to call auth static method of XYZ class and access the currentUser property

and in the second case I want also to access phoneNumber property of currentUser object

NOTE: I don't know Objective-C but I trying to build ReactNative Module that require from me to do this in Objective-C, currently I haven't the time to learn this language.

Most likely [XYZ auth].currentUser.phoneNumber;

vadian
– vadian

2017-08-28 11:50:42 +00:00
Commented Aug 28, 2017 at 11:50 — vadian
– vadian, Commented Aug 28, 2017 at 11:50

giorashc · Accepted Answer · 2017-08-28 11:50:41Z

1

Use the following:

[XYZ auth].currentUser.phoneNumber

The [] syntax is used to send a message (i.e. call a method) on an instance or a class. In this case we are calling a static method auth on class XYZ then we access with . the required property

answered Aug 28, 2017 at 11:50

giorashc

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4 Comments

Lorenzo B Over a year ago

Do you know the . syntax is a concise alternative to accessor method calls? You should really clarify it in your answer.

Lorenzo B Over a year ago

@giorashc Have your read my answer? Take also a look to the documentation EncapsulatingData. I'm not sure what you mean with your statement.

giorashc Over a year ago

@LorenzoB Read your answer and now I understand your statement.. however the OP asked how to convert the given code to ObjC. The fact that you just gave does not change the correctness of the answer in this context imho

Lorenzo B Over a year ago

I think so since . and [] does not make any difference since at the end you are always send a message to the object.

Lorenzo B · Accepted Answer · 2017-08-28 12:29:57Z

1

Even if you have a reply to it, I want to stress out that in Objective-C

Dot Syntax Is a Concise Alternative to Accessor Method Calls

so, the following code:

NSString *firstName = somePerson.firstName;
somePerson.firstName = @"Johnny";

is equivalent to

NSString *firstName = [somePerson firstName]
[somePerson setFirstName:@"Johnny"]

So, in your code:

[XYZ auth].currentUser.phoneNumber

is equivalent to

[[[XYZ auth] currentUser] phoneNumber]

In addition to that, I would like to say that auth method should be renamed to something more meaningful.

My question is: why do you have a static method?

edited Aug 28, 2017 at 12:29

answered Aug 28, 2017 at 12:20

Lorenzo B

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1 Comment

Ali Faris Over a year ago

thanks for clarification , ZYX is actually FIRAuth class which is from firebase firebase.google.com/docs/reference/ios/firebaseauth/api/…

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