- -(NSString *)birthdayStrFromIdentityCard:(NSString *)numberStr{
-
- if(numberStr.length == 0)
- return nil;
- NSMutableString *result = [NSMutableString stringWithCapacity:0];
- NSString *year = nil;
- NSString *month = nil;
-
- BOOL isAllNumber = YES;
- NSString *day = nil;
- if([numberStr length]<14)
- return result;
-
- //**截取前14位
- NSString *fontNumer = [numberStr substringWithRange:NSMakeRange(0, 13)];
-
- //**检测前14位否全都是数字;
- const char *str = [fontNumer UTF8String];
- const char *p = str;
- while (*p!='\0') {
- if(!(*p>='0'&&*p<='9'))
- isAllNumber = NO;
- p++;
- }
-
- if(!isAllNumber)
- return result;
-
- year = [numberStr substringWithRange:NSMakeRange(6, 4)];
- month = [numberStr substringWithRange:NSMakeRange(10, 2)];
- day = [numberStr substringWithRange:NSMakeRange(12,2)];
-
- [result appendString:year];
- [result appendString:@"-"];
- [result appendString:month];
- [result appendString:@"-"];
- [result appendString:day];
- return result;
-
- }
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