NullReferenceException trying to clear tracker parameter (iOS)

[nicolasjinchereau]

To clear a parameter, you should pass nil to value:

google-analytics-plugin-for-unity/source/Plugins/iOS-nobitcode/GAITracker.h

Lines 33 to 37 in 49a1ddf

  @param value The value to set for the parameter. If this is nil, the 
  value for the parameter will be cleared. 
  */ 
 - (void)set:(NSString *)parameterName 
       value:(NSString *)value; 

But first, this call is made, which calls +(NSString)stringWithUTF8String on value, which will throw when null is passed.

google-analytics-plugin-for-unity/source/Plugins/iOS-bitcode/GAIHandler.m

Lines 108 to 113 in 49a1ddf

 void set(const char * parameterName, const char * value ) { 
     id<GAITracker> tracker = [[GAI sharedInstance] defaultTracker]; 
      
     [tracker set:[NSString stringWithUTF8String:parameterName] 
            value:[NSString stringWithUTF8String:value ]]; 
 } 

But before calling those two, you must call this in C#, which calls ToString() on the value without checking if it's null.

google-analytics-plugin-for-unity/source/Plugins/GoogleAnalyticsV3/GAIHandler.cs

Lines 95 to 97 in 5a5caee

 public void _set(string parameterName, object value){ 
   set(parameterName, value.ToString()); 
 } 

Finally, SetTrackerVal, which should be able to accept null to clear parameters, but crashes due to aforementioned problems.

google-analytics-plugin-for-unity/source/Plugins/GoogleAnalyticsV3/GoogleAnalyticsiOSV3.cs

Lines 124 to 126 in 5a5caee

 public void SetTrackerVal(Field fieldName, object value){ 
   handler._set(fieldName.ToString(), value); 
 }