How to prevent all rows of an NSTableView being selected at startup - objective-c

Question

I am new to Objective-C. I am using NSArrayController to fill NSTableView. Initially, I am getting all rows selected in the table view. I am unable to find the reason behind it.
for(int i=0;i<nCount;i++)
{
NSString *fileName_File = [[[filenames objectAtIndex:i] lastPathComponent] stringByDeletingPathExtension];
NSString *pathExtension = [[filenames objectAtIndex:i] pathExtension];
NSString *yourPath = [filenames objectAtIndex:i];
NSFileManager *fmgr = [[NSFileManager alloc] init];
NSDictionary *attrs = [fmgr attributesOfItemAtPath: yourPath error: nil];
[attrs retain];
UInt32 result = [attrs fileSize];
/*NSString * zStr1 = [[NSString alloc]initWithFormat:#"%d",i+1];
NSString * zStr2 = [[NSString alloc]initWithFormat:#"%#",fileName_File];
NSString * zStr3 = [[NSString alloc]initWithFormat:#"%#",pathExtension];
NSString * zStr4 = [[NSString alloc]initWithFormat:#"%d",result];
NSString * zStr5 = [[NSString alloc]initWithFormat:#"%#",[filenames objectAtIndex:i]];*/
CMyMediaData * MyMediaObj = [[CMyMediaData alloc]initWithString1:[[NSString alloc]initWithFormat:#"%#",#""]
andString2:[[NSString alloc]initWithFormat:#"%#",fileName_File]
andString3:[[[NSString alloc]initWithFormat:#"%#",pathExtension]uppercaseString]
andString4:[[NSString alloc]initWithFormat:#"%d",result]
andString5:[[NSString alloc]initWithFormat:#"%#",[filenames objectAtIndex:i]]
];
[attrs release];
[mMedia.mcMediaController.mcTableViewMyMedia addObject:MyMediaObj];
//[mMedia.nsMutaryOfDataObject addObject:MyMediaObj];
} this is the code to add data to nsarraycontroller object.mcMediaController is object of NSArrayController

Answer 1

NSArrayController has a property selectsInsertedObjects. If that is YES, inserted objects are marked selected, including the ones added by addObject:.
You can set that property to NO, or you can use the following to unset the selection after adding the items:
mMedia.mcMediaController.mcTableViewMyMedia.selectedObjects = #[];