JKDBModel 模型离线缓存第三方库

https://github.com/Joker-King/JKDBModel

1.将FMDB和DBModel拖入项目中，然后添加libsqlite3.dylib

2.

#import "JKDBModel.h" @interface WrksheetInfoModel : JKDBModel

3./** 数据库中是否存在表 */

+ (BOOL)isExistInTable;

/** 保存或更新 * 如果不存在主键，保存， * 有主键，则更新 */

- (BOOL)saveOrUpdate;

/** 保存单个数据 */

- (BOOL)save;

/** 批量保存数据 */

+ (BOOL)saveObjects:(NSArray *)array;

/** 更新单个数据 */

- (BOOL)update;

/** 批量更新数据*/

+ (BOOL)updateObjects:(NSArray *)array;

/** 删除单个数据 */

- (BOOL)deleteObject;

/** 批量删除数据 */

+ (BOOL)deleteObjects:(NSArray *)array;

/** 通过条件删除数据 */

+ (BOOL)deleteObjectsByCriteria:(NSString *)criteria;

/** 清空表 */

+ (BOOL)clearTable;/** 查询全部数据 */+ (NSArray *)findAll;

/** 通过主键查询 */

+ (instancetype)findByPK:(int)inPk;

/** 查找某条数据 */

+ (instancetype)findFirstByCriteria:(NSString *)criteria;

/** 通过条件查找数据 * 这样可以进行分页查询 @" WHERE pk > 5 limit 10" */

+ (NSArray *)findByCriteria:(NSString *)criteria;

/** * 创建表 * 如果已经创建，返回YES */

+ (BOOL)createTable;#pragma mark - must be override method

/** 如果子类中有一些property不需要创建数据库字段，那么这个方法必须在子类中重写 */

+ (NSArray *)transients;

4.使用示例

#pragma mark - 插入数据 /** 创建多条子线程 */ - ( IBAction )insertData:( id )sender {     for ( int i = 0; i < 1; i++) {         User *user = [[ User alloc ] init ];         user. name = [ NSString stringWithFormat : @" 麻子 %d" ,i];         user. sex = @" 男 " ;         user. age = 10+i;         dispatch_async ( dispatch_get_global_queue (0, 0), ^{             [user save ];         });     } } /** 子线程一 : 插入多条用户数据 */ - ( IBAction )insertData2:( id )sender {     dispatch_queue_t q1 = dispatch_queue_create ( "queue1" , NULL );     dispatch_async (q1, ^{         for ( int i = 0; i < 5; ++i) {             User *user = [[ User alloc ] init ];             user. name = @" 赵五 " ;             user. sex = @" 女 " ;             user. age = i+5;             [user save ];         }     }); } - ( IBAction )insertData3:( id )sender {     for ( int i = 0; i < 1000; ++i) {         User *user = [[ User alloc ] init ];         user. name = @" 张三 " ;         user. sex = @" 男 " ;         user. age = i+5;         [user save ];     } } /** 子线程三：事务插入数据 */ - ( IBAction )insertData4:( id )sender {     dispatch_async ( dispatch_get_global_queue (0, 0), ^{         NSMutableArray *array = [ NSMutableArray array ];         for ( int i = 0; i < 500; i++) {             User *user = [[ User alloc ] init ];             user. name = [ NSString stringWithFormat : @" 李四 %d" ,i];             user. age = 10+i;             user. sex = @" 女 " ;             [array addObject :user];         }         [ User saveObjects :array];     }); } #pragma mark - 删除数据 /** 通过条件删除数据 */ - ( IBAction )deleteData:( id )sender { //    [User deleteObjectsByCriteria:@" WHERE pk < 10"];     [ User deleteObjectsWithFormat : @"Where %@ < %d" , @"pk" ,10]; } /** 创建多个线程删除数据 */ - ( IBAction )deleteData2:( id )sender {     for ( int i = 0; i < 5; i++) {         User *user = [[ User alloc ] init ];         user. pk = 1+i;         dispatch_async ( dispatch_get_global_queue (0, 0), ^{             [user deleteObject ];         });     } } /** 子线程用事务删除数据 */ - ( IBAction )deleteData3:( id )sender {     dispatch_async ( dispatch_get_global_queue (0, 0), ^{         NSMutableArray *array = [ NSMutableArray array ];         for ( int i = 0; i < 500; i++) {             User *user = [[ User alloc ] init ];             user. pk = 501+i;             [array addObject :user];         }         [ User deleteObjects :array];     }); } #pragma mark - 修改数据 /** 创建多个线程更新数据 */ - ( IBAction )updateData1:( id )sender {     for ( int i = 0; i < 5; i++) {         User *user = [[ User alloc ] init ];         user. name = [ NSString stringWithFormat : @" 更新 %d" ,i];         user. age = 120+i;         user. pk = 5+i;         dispatch_async ( dispatch_get_global_queue (0, 0), ^{             [user update ];         });     } } /** 单个子线程批量更新数据，利用事务 */ - ( IBAction )updateData:( id )sender {     dispatch_queue_t q3 = dispatch_queue_create ( "queue3" , NULL );     dispatch_async (q3, ^{         NSMutableArray *array = [ NSMutableArray array ];         for ( int i = 0; i < 500; i++) {             User *user = [[ User alloc ] init ];             user. name = [ NSString stringWithFormat : @" 啊我哦 %d" ,i];             user. age = 88+i;             user. pk = 10+i;             [array addObject :user];         }         [ User updateObjects :array];     });     } #pragma mark - 查询 /** 查询单条记录 */ - ( IBAction )queryData1:( id )sender {     dispatch_async ( dispatch_get_global_queue (0, 0), ^{         NSLog ( @" 第一条 :%@" ,[ User findFirstByCriteria : @" WHERE age = 20 " ]);     }); } /**  条件查询多条记录 */ - ( IBAction )queryData2:( id )sender {     dispatch_async ( dispatch_get_global_queue (0, 0), ^{         NSLog ( @" 小于 20 岁 :%@" ,[ User findByCriteria : @" WHERE age < 20 " ]);     }); } /** 查询全部数据 */ - ( IBAction )queryData3:( id )sender {     dispatch_async ( dispatch_get_global_queue (0, 0), ^{         NSLog ( @" 全部 :%@" ,[ User findAll ]);     }); } /** 分页查询数据 */ - ( IBAction )queryData:( id )sender {     static int pk = 5;     NSArray *array = [ User findByCriteria :[ NSString stringWithFormat : @" WHERE pk > %d limit 10" ,pk]];     pk = (( User *)[array lastObject ]). pk ;     NSLog ( @"array:%@" ,array); } - ( void )prepareForSegue:( UIStoryboardSegue *)segue sender:( id )sender {     NSString *title = @" 查询 " ;     int type = 3;     if ([segue. identifier isEqualToString : @"One" ]) {         title = @" 查询一条数据 " ;         type = 1;     } else if ([segue. identifier isEqualToString : @"Two" ]){         title = @" 条件查询 " ;         type = 2;     } else if ([segue. identifier isEqualToString : @"Three" ]){         title = @" 查询全部 " ;         type = 3;     } else if ([segue. identifier isEqualToString : @"Four" ]){         title = @" 分页查询 " ;         type = 4;     }         QueryTableViewController *destVC = segue. destinationViewController ;     destVC. title = title;     destVC. type = type; }

如果模型属性中包含数组或者字典，需要做如下操作：

1.模型属性全部用NSString修饰 2.模型属性赋值时   model. orderHisInfo = [[ NSString alloc ] initWithData :[ Utility toJSONData :dic[ @"orderHisInfo ” ]]  encoding:NSUTF8StringEncoding]; // 查看进程 3.取值时，取出来是数组或者字典   [ Utility  toArrayOrNSDictionary :[ self . model . orderHisInfo  dataUsingEncoding : NSUTF8StringEncoding ]];

// 将 JSON 串转化为字典或者数组  数组转换字符串 + ( id )toArrayOrNSDictionary:( NSData *)jsonData{     NSError *error = nil ;     id jsonObject = [ NSJSONSerialization JSONObjectWithData :jsonData                                                     options : NSJSONReadingMutableContainers                                                       error :&error];         if (jsonObject != nil && error == nil ){         return jsonObject;     } else {         // 解析错误         return nil ;     }     } // 将字典或者数组转化为 JSON 串 + ( NSData *)toJSONData:( id )theData{         NSError *error = nil ;     NSData *jsonData = [ NSJSONSerialization dataWithJSONObject :theData                                                        options : NSJSONWritingPrettyPrinted                                                          error :&error];     NSLog ( @"%@" , jsonData);         if ([jsonData length ] != 0 && error == nil ){         return jsonData;     } else {         return nil ;     } }