iOS---取出字符串中的数字

 //取出字符串中的数字

    /** ---------------------------------------------------------------------------*/

第一种:

字符串: urlString

    NSScanner *scanner = [NSScanner scannerWithString:urlString];

    [scanner scanUpToCharactersFromSet:[NSCharacterSet decimalDigitCharacterSet] intoString:nil];

    

    int number;

    [scanner scanInt:&number];    

    NSString *num=[NSString stringWithFormat:@"%d",number];

    

    /** ---------------------------------------------------------------------------*/

第二种:

字符串: urlString

    NSCharacterSet* nonDigits =[[NSCharacterSet decimalDigitCharacterSet] invertedSet];

    int remainSecond =[[urlString stringByTrimmingCharactersInSet:nonDigits] intValue];

    NSLog(@" num %d ",remainSecond);