小编she*_*r17的帖子

我在NSData或UIImage中查找图像类型中的以下代码,这有助于检查UIimage的四种不同图像类型

     (NSString *)contentTypeForImageData:(NSData *)data {
    uint8_t c;
    [data getBytes:&c length:1];

    switch (c) {
    case 0xFF:
        return @"image/jpeg";
    case 0x89:
        return @"image/png";
    case 0x47:
        return @"image/gif";
    case 0x49:
    case 0x4D:
        return @"image/tiff";
    }
    return nil;
}

我想知道如何找到该文件是一个位图图像或不具有.bmp扩展名.有人可以请帮助我.修改上面的代码也可以找到bmp,或者请给我一些代码的解决方案.

谢谢你

SET SERVEROUTPUT ON;
DECLARE
    type r05_id_type is TABLE  of r01_table.R01_ID%TYPE;

    r01_ids r05_id_type;
BEGIN

SELECT r1.r01_ID as R01_ID
BULK COLLECT INTO r01_ids
FROM r01_table r1, r05_table r5
WHERE r1.r01_ID= r5.r05_R01_ID_FK
AND r5.r05_status='D' AND  r5.r05_date_time_captured <= TRUNC(SYSDATE) - 1095 
AND r1.r01_id NOT IN(select r01.r01_ID
                FROM r01_table r01, r05_table r05
                WHERE r05.r05_status !='D'
                AND r01.r01_ID= r05.r05_R01_ID_FK);

  dbms_output.put_line(r01_ids.COUNT);

  FOR indx IN 1 .. r01_ids.COUNT
  LOOP
     dbms_output.put_line(r01_ids(indx));
     insert all into r01_table_archived (R01_ID_TYPE,R01_IDENTITY_NUMBER,R01_PASSPORT_COUNTRY,R01_DATE_TIME_CAPTURED)
     values(rr1_R01_ID_TYPE,rr1_R01_IDENTITY_NUMBER,rr1_R01_PASSPORT_COUNTRY,rr1_R01_DATE_TIME_CAPTURED)
     select rr1_R01_ID_TYPE,rr1_R01_IDENTITY_NUMBER,rr1_R01_PASSPORT_COUNTRY,rr1_R01_DATE_TIME_CAPTURED
     FROM (SELECT R01_ID_TYPE,R01_IDENTITY_NUMBER,R01_PASSPORT_COUNTRY,R01_DATE_TIME_CAPTURED
            FROM r01_table
            WHERE r01_id IN (r01_ids));
  END …