How to restore the ACEDrawingLabelView object after encoding and decoding in ios?

Question

In iOS, We use ACEDrawingView library for drawing purpose. We need to encode/decode the ACEDrawingView Tool objects. For that we use encodeWithCoder() and initWithCoder() methods. But objects are not properly encode.

- (void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeFloat:self.lineAlpha forKey:@"lineAlpha"];
[aCoder encodeObject:self.lineColor forKey:@"lineColor"];
[aCoder encodeFloat:self.lineWidth forKey:@"lineWidth"];
[aCoder encodeObject:self.drawingView forKey:@"drawingView"];
[aCoder encodeObject:self.labelView forKey:@"ACEDrawinglabelView"];
}

 -(id)initWithCoder:(NSCoder *)aDecoder{
if(self = [super init]){
    self.lineColor = [aDecoder decodeObjectForKey:@"lineColor"];
    self.lineAlpha = [aDecoder decodeFloatForKey:@"lineAlpha"];
    self.lineWidth = [aDecoder decodeFloatForKey:@"lineWidth"];
    self.drawingView = [aDecoder decodeObjectForKey:@"drawingView"];
    self.labelView = [aDecoder decodeObjectForKey:@"ACEDrawinglabelView"];
}

After using the above methods we are able to get the labelView but we are not able to get the subViews. Please refer the below screen shots.

Before encoding the ACEDrawingLabelView object we can see all its properties along with its subViews

After encoding and again decoding the object some of the properties of the object are lost and also the subViews are missing.

What else can we do to get the object restored along with its properties and its subviews?