Hello everyone,
Recently, I have encountered an issue in my tvOS app where a specific property of UITextField, isSecureTextEntry, set to true, was preventing another property, keyboardType, from functioning correctly. In my case, keyboardType is set to numberPad option.
The problem is that during the first tap on the text field, the default keyboard with numbers, letters, and some special characters opens. However, after the second tap, the correct keyboard type with only numbers appears as I want. Removing isSecureTextEntry or setting to false solves the problem.
import UIKit
class ViewController: UIViewController {
private let textField = UITextField()
override func viewDidLoad() {
super.viewDidLoad()
textField.keyboardType = .numberPad
textField.isSecureTextEntry = true
view.addSubview(textField)
setupConstraints()
}
}
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Hello 👋
I need to implement a logic for searching for devices with our own service type using Bonjour. Using the NWBrowser, I can receive a list of all devices and connect to them. I need to utilize a WebSocket connection. By the property endpoint of NWBrowser.Result objects I can create NWConnection. Below is my implementation which works fine on iOS 17:
let params = NWParameters.tcp
let webSocketOptions = NWProtocolWebSocket.Options()
params.defaultProtocolStack.applicationProtocols.insert(webSocketOptions, at: 0)
// The `endpoint` is from `browseResultsChangedHandler` of NWBrowser
let connection = NWConnection(to: endpoint, using: params)
However, it doesn't work on iOS 15 and 16 because of the crash:
2024-06-01 16:07:18.136068+0300 MyApp[591:16845549] [] nw_endpoint_get_url called with null endpoint
2024-06-01 16:07:18.136932+0300 MyApp[591:16845549] [] nw_endpoint_get_url called with null endpoint, dumping backtrace:
[arm64] libnetcore-3100.102.1
0 Network 0x000000018530e174 __nw_create_backtrace_string + 188
1 Network 0x000000018538ba20 nw_endpoint_get_url + 852
2 Network 0x0000000185310020 nw_ws_create_client_request + 84
3 Network 0x0000000184f4b3cc __nw_ws_create_state_block_invoke + 416
4 Network 0x000000018504bc68 nw_protocol_options_access_handle + 92
5 Network 0x0000000184f41e98 nw_ws_create_state + 204
6 Network 0x0000000184f41aec __nw_protocol_copy_ws_definition_block_invoke_2 + 176
7 Network 0x0000000184f69188 nw_framer_protocol_connected + 348
8 Network 0x00000001854a6638 _ZL29nw_socket_handle_socket_eventP9nw_socket + 1560
9 libdispatch.dylib 0x0000000126b89d50 _dispatch_client_callout + 16
10 libdispatch.dylib 0x0000000126b8d208 _dispatch_continuation_pop + 756
11 libdispatch.dylib 0x0000000126ba48d4 _dispatch_source_invoke + 1676
12 libdispatch.dylib 0x0000000126b94398 _dispatch_workloop_invoke + 2428
13 libdispatch.dylib 0x0000000126ba0b74 _dispatch_workloop_worker_thread + 1716
14 libsystem_pthread.dylib 0x000000012371f814 _pthread_wqthread + 284
15 libsystem_pthread.dylib 0x000000012371e5d4 start_wqthread + 8
Also, there is the stack trace of bt-command in the debug console:
* thread #20, queue = 'com.apple.network.connections', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0: 0x0000000123078c24 libsystem_platform.dylib`_platform_strlen + 4
frame #1: 0x00000001803c538c CoreFoundation`CFStringCreateWithCString + 40
frame #2: 0x0000000185310030 Network`nw_ws_create_client_request + 100
frame #3: 0x0000000184f4b3cc Network`__nw_ws_create_state_block_invoke + 416
frame #4: 0x000000018504bc68 Network`nw_protocol_options_access_handle + 92
frame #5: 0x0000000184f41e98 Network`nw_ws_create_state + 204
frame #6: 0x0000000184f41aec Network`__nw_protocol_copy_ws_definition_block_invoke_2 + 176
frame #7: 0x0000000184f69188 Network`nw_framer_protocol_connected + 348
frame #8: 0x00000001854a6638 Network`nw_socket_handle_socket_event(nw_socket*) + 1560
frame #9: 0x0000000126b89d50 libdispatch.dylib`_dispatch_client_callout + 16
frame #10: 0x0000000126b8d208 libdispatch.dylib`_dispatch_continuation_pop + 756
frame #11: 0x0000000126ba48d4 libdispatch.dylib`_dispatch_source_invoke + 1676
frame #12: 0x0000000126b94398 libdispatch.dylib`_dispatch_workloop_invoke + 2428
frame #13: 0x0000000126ba0b74 libdispatch.dylib`_dispatch_workloop_worker_thread + 1716
frame #14: 0x000000012371f814 libsystem_pthread.dylib`_pthread_wqthread + 284
I have found out a couple things:
There are no crashes if I initialize the NWConnection object with using, for instance, the NWEndpoint.url(_:). initializer:
let urlHost = URL(string: "ws://10.20.30.40:5060")!
let endpoint = NWEndpoint.url(urlHost)
let params = NWParameters.tcp
let webSocketOptions = NWProtocolWebSocket.Options()
params.defaultProtocolStack.applicationProtocols.insert(webSocketOptions, at: 0)
let connection = NWConnection(to: endpoint, using: params)
self.connection = connection
But, in this case, I must extract IP-addresses 🙇♂️ Meanwhile, there is a topic such as Don’t Try to Get the Device’s IP Address..
I have tried to find anything that could help me move forward in this problem and run into some odd behaviour. There is a property skipHandshake of NWProtocolWebSocket.Options object. If I set the property value to true, there are no crashes as well as no connection to a device.
Hello to everybody 👋
I and my coworkers can't solve a dispute about initialization of a view hierarchy for a long time. We implement a view hierarchy from code, without using Interface Builder. Each of us has own background experience about how it should work "right". If everything is clearly and understandably in Objective-C, there are some questions in Swift on which Apple hasn't answered.
We have three technical solutions and each of us applies own solution:
1️⃣
swift
class SomeClass: UIViewController {
private var someLabel: UILabel!
private var someSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
let someLabel = UILabel()
someLabel.text = "Test"
view.addSubview(someLabel)
self.someLabel = someLabel
let someSwitch = UISwitch()
someSwitch.isOn = true
view.addSubview(someSwitch)
self.someSwitch = someSwitch
}
}
2️⃣
swift
class SomeClass: UIViewController {
private let someLabel = UILabel()
private let someSwitch = UISwitch()
override func viewDidLoad() {
super.viewDidLoad()
someLabel.text = "Test"
view.addSubview(someLabel)
someSwitch.isOn = true
view.addSubview(someSwitch)
}
}
3️⃣
swift
class SomeClass: UIViewController {
private lazy var someLabel = UILabel()
private lazy var someSwitch = UISwitch()
override func viewDidLoad() {
super.viewDidLoad()
someLabel.text = "Test"
view.addSubview(someLabel)
someSwitch.isOn = true
view.addSubview(someSwitch)
}
}
I suppose that the same question has already discussed here, but I haven't found a discussion. If you know where there was the discussion, please, send to me.