Updating city in iOS Contacts postalAddress - ios

Question

I’m new to iOS (Swift) development, and I’ve been tinkering with this all week. I am trying to update only the city of the postal addresses of a contact from iOS Contacts, and leave the rest of the postal address (street, ZIP code, etc.) intact. I figured I could just get a mutable copy of the contact.postalAddress using postalAddress.mutableCopy(), and then write to mutableCopy.city = “New City”. However, when I try this I get a -[CNLabeledValue mutableCopyWithZone:]: unrecognized selector sent to instance error. My current solution is to create a new address filled with values from the old address, but it seems there should be a better way (like copying the old address and just changing the city, like I’m trying to do). Is there something I’m missing? Thanks!
So, what I want to work:
func updateContact(contact: CNContact) -> BooleanLiteralType{
var success = false
let store = CNContactStore()
do {
let updContact = contact.mutableCopy() as! CNMutableContact
var addrArray = [CNLabeledValue<CNPostalAddress>]()
for postAddress in updContact.postalAddresses{
let curLabel = postAddress.label
var address = postAddress.mutableCopy() as! CNMutablePostalAddress
address.city = "Cityville"
let curAddrLabeledVal = CNLabeledValue<CNPostalAddress>(label:curLabel, value:address)
addrArray.append(curAddrLabeledVal)
}
updContact.postalAddresses = addrArray
let req = CNSaveRequest()
req.update(updContact)
try store.execute(req)
success = true
}
catch let err{
print(err)
}
return success
}
This results in the following exception:
2020-05-26 00:06:19.537517+0200 My App[78089:4168944] -[CNLabeledValue mutableCopyWithZone:]: unrecognized selector sent to instance 0x600001388b80
2020-05-26 00:06:19.545537+0200 My App[78089:4168944] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CNLabeledValue mutableCopyWithZone:]: unrecognized selector sent to instance 0x600001388b80'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23e3cf0e __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff50ba89b2 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23e5dc34 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x00007fff23e4190c ___forwarding___ + 1436
4 CoreFoundation 0x00007fff23e43bf8 _CF_forwarding_prep_0 + 120
5 My App 0x00000001015b4898 $s12My_App13updateContact7contactSbSo9CNContactC_tF + 1048
6 My App 0x00000001015bf3f1 $s12My_App11ContentViewV4bodyQrvg7SwiftUI05TupleD0VyAE0D0PAEE7opacityyQrSdFQOyAiEE5frame5width6height9alignmentQr12CoreGraphics7CGFloatVSg_ArE9AlignmentVtFQOyAA11ProgressBarV_Qo__Qo__AE010NavigationD0VyAiEE010navigationS5Items7leading8trailingQrqd___qd_0_tAeHRd__AeHRd_0_r0_lFQOyAiEE0uS5TitleyQrAE4TextVFQOyAE4ListVys5NeverOAE7ForEachVySaySo9CNContactCGSSAE6HStackVyAE0T4LinkVyAA10ContactRowVAA13ContactDetailVGGGG_Qo__AE6ButtonVyA4_GA29_Qo_GtGyXEfU_A30_yXEfU_yycfU2_yycfU_ + 465
7 My App 0x00000001015bf8f0 $sIeg_IeyB_TR + 48
8 libdispatch.dylib 0x0000000101877f11 _dispatch_call_block_and_release + 12
9 libdispatch.dylib 0x0000000101878e8e _dispatch_client_callout + 8
10 libdispatch.dylib 0x000000010187b2d8 _dispatch_queue_override_invoke + 1022
11 libdispatch.dylib 0x000000010188a399 _dispatch_root_queue_drain + 351
12 libdispatch.dylib 0x000000010188aca6 _dispatch_worker_thread2 + 135
13 libsystem_pthread.dylib 0x00007fff51c089f7 _pthread_wqthread + 220
14 libsystem_pthread.dylib 0x00007fff51c07b77 start_wqthread + 15
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
This is the solution that works, but as you can see it’s not really what I want as it requires me to define all postalAddress attributes:
func updateContact(contact: CNContact) -> BooleanLiteralType{
var success = false
let store = CNContactStore()
do {
let updContact = contact.mutableCopy() as! CNMutableContact
var addrArray = [CNLabeledValue<CNPostalAddress>]()
for postAddress in updContact.postalAddresses{
let curLabel = postAddress.label
let address = CNMutablePostalAddress()
address.street = postAddress.value.street
address.city = "Cityville"
address.postalCode = postAddress.value.postalCode
address.state = postAddress.value.state
address.country = postAddress.value.country
address.isoCountryCode = postAddress.value.isoCountryCode
address.subAdministrativeArea = postAddress.value.subAdministrativeArea
address.subLocality = postAddress.value.subLocality
let curAddrLabeledVal = CNLabeledValue<CNPostalAddress>(label:curLabel, value:address)
addrArray.append(curAddrLabeledVal)
}
updContact.postalAddresses = addrArray
let req = CNSaveRequest()
req.update(updContact)
try store.execute(req)
success = true
}
catch let err{
print(err)
}
return success
}
Any help is much appreciated!