Implement UIView extension function using Generic in objective C - objective-c

Question

I am trying to convert some swift function to objective-c
extension UIView {
class func fromNib<T: UIView>() -> T {
return Bundle(for: T.self).loadNibNamed(String(describing: T.self), owner: nil, options: nil)![0] as! T
}
}
It is a code from Load a UIView from nib in Swift
I thought .h file can be wrote like this
#interface UIView <T: UIView *> (MyCommon)
+ (T) loadFromNib;
#end
And I got error like this
Category of non-parameterized class 'UIView' cannot have type parameters
Is that means it's impossible to implement UIView extension function using Generic in objective C?

Answer 1

That answer I mentioned use a NSObject category. Maybe change that to a UIView category as below.
EDIT
Since you want a MyView see the changes below and try that. Note that in Objective-C you get a warning while Swift will slap you on the wrist for such code ...
#class MyView;
#interface UIView (loadFromNib)
#end
#implementation UIView (LoadFromNib)
// This only returns UIView or subclass ... or nil
+ ( UIView * )loadFromNib:( NSString * ) name
{
// For the adventurous
return [[NSBundle mainBundle] loadNibNamed:name owner:self options:nil].firstObject;
// For the cautious
for ( NSObject * i in [[NSBundle mainBundle] loadNibNamed:name owner:self options:nil] )
{
if ( [i isKindOfClass:UIView.class] )
{
return i;
}
}
// For the unsuccessful
return nil;
}
// This returns MyView
+ ( MyView * ) loadMyViewFromNib:( NSString * ) name
{
return [UIView loadFromNib:name];
}
#end