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We need to see code in order to help you. (Sorry I'm not going to watch a 6 minute YouTube Video.)

Given the error message "Object cannot be set - either readonly property or no setter found", then your statement already suggests the answer...? In other words, maybe a setter is needed.

I don't think it has a setter.
 
Without code, it's just a guess.

But, make sure to check your .m file for an "@synthesize foo;" Normally, that's what causes that type of message.

If you have "@property (nonatomic, retain) NSString *foo;" in your .h file. Check the corresponding .m file for the "@synthesize foo;" -- as that is what generates the setter and getter for "foo".

Hope that makes sense.
 
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