fix: us OSLog framework for logging on iOS (#120)

* fix: us OSLog framework for logging on iOS

* cleanup

library/Cargo.toml

@@ -62,8 +62,8 @@ log-panics = { version = "2", features = ["with-backtrace"] }
 [target.'cfg(target_os = "ios")'.dependencies]
 # Send panics to syslog (instead of stderr).
 log-panics = { version = "2", features = ["with-backtrace"] }
-# Use stderr for logging on iOS.
-simple-logging = "2.0.2"
+# Support for logging on iOS (https://developer.apple.com/documentation/oslog)
+oslog = "0.2.0"
 
 [dev-dependencies]
 mockall = "0.11.4"

library/src/logging.rs

@@ -13,10 +13,13 @@ pub fn init_logging() {
 
 #[cfg(target_os = "ios")]
 pub fn init_logging() {
-    // I could not figure out how to get fancier logging set up on iOS
-    // but logging to stderr seems to work.
-    simple_logging::log_to(std::io::stderr(), log::LevelFilter::Info);
-    debug!("Logging initialized");
+    let init_result = oslog::OsLogger::new("dev.shorebird")
+        .level_filter(log::LevelFilter::Info)
+        .init();
+    match init_result {
+        Ok(_) => debug!("Logging initialized"),
+        Err(e) => error!("Failed to initialize logging: {}", e),
+    }
 }
 
 #[cfg(all(not(target_os = "android"), not(target_os = "ios")))]