存储图片
// Save Small Image Data by given main url - (void) SaveImagesToSql: (NSData*) imgData :(NSString*) mainUrl { NSLog( @"\n*****Save image to SQLite*****\n" ); const char* sqliteQuery = "INSERT INTO IMAGES (URL, IMAGE) VALUES (?, ?)"; sqlite3_stmt* statement; if( sqlite3_prepare_v2(articlesDB, sqliteQuery, -1, &statement, NULL) == SQLITE_OK ) { sqlite3_bind_text(statement, 1, [mainUrl UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_blob(statement, 2, [imgData bytes], [imgData length], SQLITE_TRANSIENT); sqlite3_step(statement); } else NSLog( @"SaveBody: Failed from sqlite3_prepare_v2. Error is: %s", sqlite3_errmsg(articlesDB) ); // Finalize and close database. sqlite3_finalize(statement); }
读取图片
// Load images from data base with given image url - (NSData*) LoadImagesFromSql: (NSString*) imageLink { NSData* data = nil; NSString* sqliteQuery = [NSString stringWithFormat:@"SELECT IMAGE FROM IMAGES WHERE URL = '%@'", imageLink]; sqlite3_stmt* statement; if( sqlite3_prepare_v2(articlesDB, [sqliteQuery UTF8String], -1, &statement, NULL) == SQLITE_OK ) { if( sqlite3_step(statement) == SQLITE_ROW ) { int length = sqlite3_column_bytes(statement, 0); data = [NSData dataWithBytes:sqlite3_column_blob(statement, 0) length:length]; } } // Finalize and close database. sqlite3_finalize(statement); return data; }