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Advanced iOS Tag Manager configuration

To extend the functionality of Google Tag Manager, you can add Function Call variables and Function Call tags. Function Call variables let you capture the values returned by calls to pre-registered functions. Function Call tags let you execute pre-registered functions (e.g. to trigger hits for additional measurement and remarketing tools that are not currently supported with tag templates in Google Tag Manager).

To create a custom tag, create a class that implements the TAGCustomFunction protocol:

@implementation MYCustomTag<TAGCustomFunction>

- (NSObject*)executeWithParameters:(NSDictionary*)parameters {
  // Add custom tag implementation here.
}

@end

To create a custom variable, create a class that implements the TAGCustomFunction protocol:

@implementation MYCustomVariable<TAGCustomFunction>

- (NSObject*)executeWithParameters:(NSDictionary*)parameters {
  // Return the value of the custom variable.
  return @42;
}

@end

Once your class has been set up with TAGCustomFunction, use Tag Manager's web interface to set up tags or variables with the class name you created.