(chore): Add debugLevel setting into sample codes (JIRA-4729) (#196)

* add debugLevel setting into sample codes

* change logLevel to debug for sample codes

Author: jaeopt

DemoObjCApp/AppDelegate.m

@@ -109,7 +109,7 @@ -(void)initializeOptimizelySDKWithCustomization {
                                                 eventDispatcher:nil
                                              userProfileService:nil
                                        periodicDownloadInterval:customDownloadIntervalInSecs
-                                                defaultLogLevel:OptimizelyLogLevelInfo];
+                                                defaultLogLevel:OptimizelyLogLevelDebug];
 
     NSNumber *notifId;
     notifId = [self.optimizely.notificationCenter addDecisionNotificationListenerWithDecisionListener:^(NSString *type,

DemoSwiftApp/AppDelegate.swift

@@ -54,9 +54,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     // MARK: - Initialization Examples
 
     func initializeOptimizelySDKAsynchronous() {
-        optimizely = OptimizelyClient(sdkKey: sdkKey)
-        var handler = optimizely.datafileHandler
-        handler.endPointStringFormat = "https://cdn.optimizely.com/datafiles/%@.json"
+        optimizely = OptimizelyClient(sdkKey: sdkKey, defaultLogLevel: .debug)
 
         optimizely.start { result in
             switch result {
@@ -74,8 +72,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         guard let localDatafilePath = Bundle.main.path(forResource: datafileName, ofType: "json") else {
             fatalError("Local datafile cannot be found")
         }
-        
-        optimizely = OptimizelyClient(sdkKey: sdkKey)
+   
+        optimizely = OptimizelyClient(sdkKey: sdkKey, defaultLogLevel: .debug)
 
         do {
             let datafileJSON = try String(contentsOfFile: localDatafilePath, encoding: .utf8)
@@ -98,8 +96,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
         optimizely = OptimizelyClient(sdkKey: sdkKey,
                                        logger: customLogger,
-                                       periodicDownloadInterval: customDownloadIntervalInSecs)
-        
+                                       periodicDownloadInterval: customDownloadIntervalInSecs,
+                                       defaultLogLevel: .debug)
         // notification listeners
 
         _ = optimizely.notificationCenter.addDecisionNotificationListener(decisionListener: { (type, userId, attributes, decisionInfo) in