ios - Getting '-[__NSCFArray removeObjectAtIndex:]: mutating method sent to immutable object' while trying to reorder cells in UITableView -

i'm using afnetworking fetch json data in uitableview cells. have declared array nsmutablearray, still i'm getting -[__nscfarray removeobjectatindex:]: mutating method sent immutable object error , application crashing whenever i'm trying reorder cells.

here's logic i'm using reordering -

-(void)tableview:(uitableview *)tableview moverowatindexpath:(nsindexpath *)fromindexpath  toindexpath:(nsindexpath *)toindexpath {  nsstring *item = [self.jobsarrayfromafnetworking objectatindex:fromindexpath.row]; [self.jobsarrayfromafnetworking removeobject:item]; [self.jobsarrayfromafnetworking insertobject:item atindex:toindexpath.row];   } 

i tried solutions being answered before, couldn't understand. can tell me what's going wrong here? thanks!

your @property jobsarrayfromafnetworking either initialized nsarray or declared copy.

both lead error message since backing ivar point (immutable) nsarray.

if declared property of nsmutablearray type, use strong storage modifier instead of copy.