An effective way of removing prefix

delete_prefix.m

// Raw data
NSString *appname = @"<NSRunningApplication: 0x600000107d70 (com.apple.iChat - 8272)>";

// Splitting address & appname
NSArray *splitted = [appname componentsSeparatedByString:@" "];

// Getting the pid
NSString *pid = [splitted objectAtIndex:2];

if([pid hasPrefix:@"("]){
    
    // Splitting the unwanted with wanted
    NSArray *rmprefix = [pid componentsSeparatedByString:@"("];
  
    // Retrieving the filtered pid
    pid = [rmprefix objectAtIndex:1];
}

NSLog(@"%@", pid);