gistfile1.m

/** Public, and safe since UIKit is single-threaded */
+(instancetype)controllerWithParam:(id)param0 {
  nextParam0 = param0;
  id vc = [[UIStoryboard storyboard…] instantiateViewController…];
  return vc;
}
static id nextParam0;
-(id)initWithCoder:(NSCoder *)aDecoder {
  self = [super initWithCoder:aDecoder];
  if(!self) return nil;
  self.param0 = nextParam0;
  nextParam0 = nil;
  return self;
}

// or even
-(id)initWithCoder:(NSCoder *)aDecoder param0:(id)p0 {
  self = [super initWithCoder:aDecoder];
  if(!self) return nil;
  self.param0 = p0;
  return self;
}
-(id)initWithCoder:(NSCoder *)aDecoder {
  id p0 = nextParam0; nextParam0 = nil;
  return [self initWithCoder:aDecoder param0:nextParam0];
}