Hi,
I'm trying to set up FIRDebugEnabled as launch arguments in app delegate based on user choice using ProcessInfo.processInfo.arguments. Which is working fine in iOS 17 and below devices and stoped working in iOS 18
Here is my sample,
if condition {
var arguments = ProcessInfo.processInfo.arguments
arguments.append("-FIRDebugEnabled")
ProcessInfo.processInfo.setValue(arguments, forKey: "arguments")
}
Oh gosh, don’t do that!
The environment property is read-only and you’re bypassing that using key-value-coding (KVC). That sort of thing is not supported, and this is a good example as to why. Over the last few years we’ve been steadily rewriting Foundation in Swift [1], and that rewrite doesn’t support the implementation detail you were relying on.
The correct way to set an environment variable is with setenv. For example, this code:
print("before, version: \(UIDevice.current.systemVersion)")
print(ProcessInfo.processInfo.environment["foo"] ?? "-")
print(getenv("foo").map { String(cString: $0) } ?? "-")
setenv("foo", "bar", 1)
print("after")
print(ProcessInfo.processInfo.environment["foo"] ?? "-")
print(getenv("foo").map { String(cString: $0) } ?? "-")
works on iOS 17:
before, version: 17.5
-
-
after
bar
bar
and 18:
before, version: 18.0
-
-
after
bar
bar
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
[1] If you’re curious, watch the first half of Swift & Interoperability.
https://youtu.be/**6C_XEv1Mo