objc runtime used to create dynamic attribute

objc_runtime_util

- (NSString *)viewFrame1 {
  
  return objc_getAssociatedObject(self, kUIViewAdditionsFrame1);
}

- (void)setViewFrame1:(NSString *)frameStr {
  
  objc_setAssociatedObject(self, kUIViewAdditionsFrame1, frameStr, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


- (NSString *)viewFrame2 {
  
  return objc_getAssociatedObject(self, kUIViewAdditionsFrame2);
}

- (void)setViewFrame2:(NSString *)frameStr {
  
  objc_setAssociatedObject(self, kUIViewAdditionsFrame2, frameStr, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}