Use runtime to rewrite the coder and Decode methods when archiving the solution

When we archive custom objects, we can override the Encodewithcoder and Initwithcoder of the custom model.

That's probably the beginning, and when there's a lot of attributes, it doesn't seem like it's a good idea to repeat the same thing. Actually, we can give it to runtime.

-(void) Encodewithcoder: (Nscoder *) Acoder//encode attribute {    [acoder encodeObject:self.name forkey:@ ' name '];    [Acoder encodeObject:self.phone forkey:@ "Phone"];    [Acoder encodeInteger:self.age forkey:@ "age"];   } -(ID) Initwithcoder: (Nscoder *) Adecoder//decode attribute {    NSString *name1 = [adecoder decodeobjectforkey:@ "name"];    NSString *phone1 = [Adecoder decodeobjectforkey:@ "Phone"];    int age1 = [Adecoder decodeintegerforkey:@ "age"];    [Self initwithname:name1 phone:phone1 age:age1];        return self;}

Use runtime to achieve the above functions

-(void) Encodewithcoder: (Nscoder *) encoder{unsigned int count;    Ivar *ivar = Class_copyivarlist ([User class], &count);        for (int i=0; i<count; i++) {Ivar IV = Ivar[i];        const char *name = Ivar_getname (iv);        NSString *strname = [NSString stringwithutf8string:name];        Use KVC to value id value = [self valueforkey:strname];    [Encoder Encodeobject:value Forkey:strname]; } free (Ivar);}    -(ID) Initwithcoder: (Nscoder *) decoder{self = [super init];        if (self) {unsigned int count = 0;        Gets the name of all member variables in the class Ivar *ivar = Class_copyivarlist ([User class], &count);            for (int i = 0; i<count; i++) {Ivar IVA = ivar[i];            const char *name = Ivar_getname (IVA);            NSString *strname = [NSString stringwithutf8string:name];            The value ID of the file to be extracted is = [decoder decodeobjectforkey:strname];        Use KVC to assign a value to a property [self setvalue:value forkey:strname]; } Free (Ivar); } return self;}

Use runtime to rewrite the coder and Decode methods when archiving the solution