openURL打电话

 通过正则表达式
  -(NSString *) formatIdentificationNumber:(NSString *)string {     NSCharacterSet * invalidNumberSet = [NSCharacterSet characterSetWithCharactersInString:@"\n_!@#$%^&*()[]{}'\".,<>:;|\\/?+=\t~` "];          NSString  * result  =  @"";     NSScanner * scanner = [NSScanner scannerWithString:string];     NSString  * scannerResult;          [scanner setCharactersToBeSkipped:nil];          while (![scanner isAtEnd])     {         if([scanner scanUpToCharactersFromSet:invalidNumberSet intoString:&scannerResult])         {             result = [result stringByAppendingString:scannerResult];         }         else         {             if(![scanner isAtEnd])             {                 [scanner setScanLocation:[scanner scanLocation]+1];             }         }     }          return result; }   - (NSString *)makeCall:(NSString *)number {     NSString *txt = number;     NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"-+() *#"];     txt = [[txt componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];     txt = [NSString  stringWithFormat:@"tel://%@", txt];     return txt; }

找了好久这个代码！终于找到了！

哈哈