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.