iPhone學(xué)習(xí) Sqlite數(shù)據(jù)庫(kù)讀寫(xiě)圖片實(shí)例
iPhone學(xué)習(xí) Sqlite數(shù)據(jù)庫(kù)讀寫(xiě)圖片實(shí)例是本文要介紹的內(nèi)容,內(nèi)容不多,基本是基于代碼實(shí)現(xiàn),我們來(lái)看內(nèi)容講解。用 iPhone 的 sqlite 數(shù)據(jù)庫(kù)讀寫(xiě)圖片,先把你的圖片轉(zhuǎn)換成 NSData 形式,然后在數(shù)據(jù)庫(kù)添加一行 blob 數(shù)據(jù),代碼如下(data就是圖片) :
- NSMutableString *insertSql = [[NSMutableString alloc] initWithString:@"INSERT INTO "];
- [insertSql appendString:BLOB];
- [insertSql appendString:@" ("];
- [insertSql appendString:BLOB_DATA];
- [insertSql appendString:@") VALUES(?1)"];
- sqlite3_stmt *insert_statement = nil;
- sqlite3 *database = 你的數(shù)據(jù)庫(kù);
- if (sqlite3_prepare_v2(database, [insertSql UTF8String], -1, &insert_statement, NULL) == SQLITE_OK) {
- sqlite3_bind_blob(insert_statement, 1, [data bytes], [data length], NULL);
- if(sqlite3_step(insert_statement) != SQLITE_DONE) {
- NSLog(@"Db error %s", sqlite3_errmsg(database));
- }
- } else {
- NSLog(@"Db error %s", sqlite3_errmsg(database));
- }
- sqlite3_finalize(insert_statement);
- [insertSql release];
小結(jié):iPhone學(xué)習(xí) Sqlite數(shù)據(jù)庫(kù)讀寫(xiě)圖片實(shí)例的內(nèi)容介紹完了,希望本文對(duì)你有所幫助!