now it works with this code:
NSString *myDate = @"06/18/2015 8:26:17 AM";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MM/dd/yyyy hh:mm:ss a"];
[dateFormatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US"]];
NSDate *date = [dateFormatter dateFromString:myDate];
[dateFormatter setDateFormat:@"dd.MM. HH:mm"];
NSString *dateString = [dateFormatter stringFromDate:date];
cell.timeLabel.text = dateString;
You have to set the date format as the string