How to Convert date format in iOS

Convert Different Date Format in IOS

+(NSString )getDateFromString:(NSString )mySstring
{
 
    //NSString * dateString = [NSString stringWithFormat: @"%@",mySstring];
 
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd/MM/yyyy"];
    //NSDate* myDate = [dateFormatter dateFromString:mySstring];
 
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy/MM/dd"];
    NSString *stringFromDate = [formatter stringFromDate:[dateFormatter dateFromString:mySstring]];
 
    NSLog(@"%@", stringFromDate);
    return stringFromDate;
}