在NSUserdefaults问题中存储custom_button？

Question

i am storing my "custom button" in NSUserdefaults using the following code.But i am getting an error "[UIImage encodeWithCoder:]: unrecognized selector sent to instance" while converting the object to NSdata..here "custom button" is UIButton class. Anyone know why...? please help me.

 Custom_button *lock11 = (Custom_button*)[menu1 viewWithTag:100];
                 NSLog(@"opened lock1 ========= %@",lock11);
                 lock11.is_menu_lock_opened = YES; 

                 NSData *myEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:lock11]; //[NSKeyedArchiver archivedDataWithRootObject:lock11];
                 [prefs setObject:myEncodedObject forKey:@"set1lock"];

Answer 1

The NSUserDefaults class provides convenience methods for accessing common types such as floats, doubles, integers, Booleans, and URLs. A default object must be a property list, that is, an instance of (or for collections a combination of instances of): NSData, NSString, NSNumber, NSDate, NSArray, or NSDictionary. If you want to store any other type of object, you should typically archive it to create an instance of NSData.

Objects that don't map directly to property list objects are turned into NSData by being sent a coder and encoding their contents. [UIImage encodeWithCoder:] . They need to conform to the NSCoding protocol for this to work. You will find that UIImage does not confirm to the NSCoding protocol before iOS 5. If you want to deploy before iOS 5 you will have to work something out yourself, by implementing NSCoding in your Custom Button class and storing that image in a different way.

Answer 2

Implement this method into your Custom_button Class

initWithCoder and encodeWithCoder for all object

-(id) initWithCoder: (NSCoder *)coder {

       self = [[CastInnerListData alloc] init];
       if (self != nil) {       
           self.object1 = [coder decodeObjectForKey:@"object1"];
           self.object2 = [coder decodeObjectForKey:@"object2"];    
    }
    return self;
}

-(void) encodeWithCoder: (NSCoder *)coder{

      [coder encodeObject:object1 forKey:@"object1"];
      [coder encodeObject:object2 forKey:@"object2"];
}

For more detail click here

Answer 3

Well a little searching would have given you the answer fast:

UIImage encodeWithCoder urecognised selector?