fix(log): iOS simulator freezing due to early logging (#2802)

* fix(log): iOS simulator freezing due to early logging

follow-up for #2626

* use logger

* set logReady

.changes/fix-log-freeze.md

@@ -0,0 +1,6 @@
+---
+"log": patch:bug
+"log-js": patch:bug
+---
+
+Fixes iOS simulator still freezing sometimes due to early logging.

plugins/log/ios/Sources/LogPlugin.swift

@@ -5,6 +5,7 @@
 import SwiftRs
 import Tauri
 import UIKit
+import os.log
 
 #if targetEnvironment(simulator)
   var logReady = false
@@ -12,24 +13,39 @@ import UIKit
   var logReady = true
 #endif
 
+var pendingLogs: [(Int, NSString)] = []
+var elapsedTime: TimeInterval = 0
+var logFlushScheduled = false
+
 @_cdecl("tauri_log")
 func log(level: Int, message: NSString) {
   if logReady {
     os_log(level, message)
   } else {
-    dispatch_log(level, message)
+    pendingLogs.append((level, message))
+    scheduleLogFlush()
   }
 }
 
-func dispatch_log(_ level: Int, _ message: NSString) {
+// delay logging when the logger isn't immediately available
-  // delay logging when the logger isn't immediately available
+// in some cases when using the simulator the app would hang when calling os_log too soon
-  // in some cases when using the simulator the app would hang when calling os_log too soon
+// better be safe here and wait a few seconds than actually freeze the app in dev mode
-  // better be safe here and wait a few seconds than actually freeze the app in dev mode
+// in production this isn't a problem
-  // in production this isn't a problem
+func scheduleLogFlush() {
-  DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
+  guard !logFlushScheduled else { return }
-    os_log(level, message)
+  logFlushScheduled = true
+
+  DispatchQueue.main.asyncAfter(deadline: .now() + 5) {
     logReady = true
+    flushLogs()
+  }
+}
+
+func flushLogs() {
+  for (level, message) in pendingLogs {
+    os_log(level, message)
   }
+  pendingLogs.removeAll()
 }
 
 func os_log(_ level: Int, _ message: NSString) {