Question

I am trying to copy a NSMutableArray* into NSArray*, but it does not works and it generates a [__NSCFString superview]: unrecognized selector sent to instance error . Here is the code:

//where gc is a NSDictionary*, recentKey is a NSString*, and _objects is a NSArray*
//gc is an singleton is used to save chache data, with NSKeyedUnarchiver class
//_objects is used to reload the UITableView's data

NSArray *savedNews = [[NSArray alloc] initWithArray:[gc objectForKey:recentkey]];

//this not works...why??
_objects = [[NSArray alloc] initWithArray:savedNews];

Resolution:

Yes, as Herman suggests, the error was external. The savedNews Array was using a class with NSEncoding with an error:

- (void)encodeWithCoder:(NSCoder *)encoder {
//...where element was NSString* and not "UIImageView"
// element should be imgView
    if (imgView) [encoder encodeObject:element forKey:@"imgView"];
}

Thanks for all guys.

Answer 1

Somewhere in your App is the superview of an NSString object fetched.
I guess that you assigned an NSString object to something where a UIView is expected.
Could be something like:

someButton.textLabel = someString; // wrong - but should generate a compiler warning

instead of

someButton.textLabel.text = someString; // correct

This is not directly related to your array issue.