5.1基于SQLite快速开发封装库

5.1基于sqlite快速开发封装库

一 LKDBHelper简介

LKDBHelper是github上开源的数据库操作封装库。

全面支持 NSArray,NSDictionary,ModelClass,NSNumber,Nsstring,NSDate,NSData,UIColor,UIImage,CGRect,CGPoint,CGSize,NSRange,int,char,float,double,long.. 等属性的自动化操作(插入和查询)。

二 如何引用LKDBHelper

*必备环境

•iOS 4.3+

•ARC only

•FMDB(https://github.com/ccgus/fmdb)

1 可以使用pod导入，pod'LKDBHelper','~> 2.1.9'。

2 手动导入，依赖于FMDB，添加libsqlite3.dylib。

三LKDBHelper使用说明

1创建一个Model

@interfaceLKTest : NSObject @property(copy,nonatomic)Nsstring* name; @propertyNSUInteger age; @propertyBOOL isgirl; @property(strong,nonatomic)LKTestForeign* address; @property(strong,nonatomic)NSArray* blah; @property(strong,nonatomic)NSDictionary* hoho; @propertychar like; ...

2在.m文件重写getTableName方法

+(Nsstring *)getTableName { return@"LKTestTable"; }

3在.m文件重写callback方法（可选）

@interfaceNSObject(LKDBHelper_Delegate) +(void)dbDidCreateTable:(LKDBHelper*)helper tableName:(Nsstring*)tableName; +(void)dbDidAlterTable:(LKDBHelper*)helper tableName:(Nsstring*)tableName addColumns:(NSArray*)columns; +(BOOL)dbWillInsert:(NSObject*)entity; +(void)dbDidInserted:(NSObject*)entity result:(BOOL)result; +(BOOL)dbWillUpdate:(NSObject*)entity; +(void)dbDidUpdated:(NSObject*)entity result:(BOOL)result; +(BOOL)dbWillDelete:(NSObject*)entity; +(void)dbDidDeleted:(NSObject*)entity result:(BOOL)result; ///data read finish +(void)dbDidSeleted:(NSObject*)entity; @end

4 初始化Model，插入数据库

LKTestForeign* foreign = [[LKTestForeign alloc]init]; foreign.address = @":asdasdasdsadasdsdas"; foreign.postcode = 123341; foreign.addid = 213214; //插入数据 insert table row LKTest* test = [[LKTest alloc]init]; test.name = @"zhan san"; test.age = 16; //外键 foreign key test.address = foreign; test.blah = @[@"1",@"2",@"3"]; test.blah = @[@"0",@[@1],@{@"2":@2},foreign]; test.hoho = @{@"array":test.blah,@"foreign":foreign,@"normal":@123456,@"date":[NSDatedate]}; //异步插入第一条数据 Insert the first [test savetoDB]; //or //[globalHelper insertToDB:test];

5 select（查询）

NSMutableArray* array = [LKTest searchWithWhere:nilorderBy:niloffset:0count:100]; for (id obj in arraySync) { addText(@"%@",[obj printAllPropertys]); }

6 delete（删除）

[LKTest deletetoDB:test];

7 update（更新）

test.name = "rename"; [LKTest updatetoDB:test where:nil];

8 isExists（是否存在）

[LKTest isExistsWithModel:test];

9 rowCount（函数）

[LKTest rowCountWithWhere:nil]; }

10 查询条件举例

single: @"rowid = 1" or @{@"rowid":@1} more: @"rowid = 1 and sex = 0" or @{@"rowid":@1,@"sex":@0} when where is "or" type,such as @"rowid = 1 or sex = 0" you only use Nsstring array: @"rowid in (1,2,3)" or @{@"rowid":@[@1,@2,@3]} composite: @"rowid in (1,3) and sex=0 " or @{@"rowid":@[@1,@3],@"sex":@0} If you want to be judged,only use Nsstring For example: @"date >= '2013-04-01 00:00:00'"

11 table mapping（表映射）

+(NSDictionary *)getTableMapping { //return nil return @{@"name":LKsqlInherit, @"MyAge":@"age", @"img":LKsqlInherit, @"MyDate":@"date", @"color":LKsqlInherit, @"address":LKsqlUserCalculate}; }

12 table update(option)（表更新）

+(void)dbDidAlterTable:(LKDBHelper *)helper tableName:(Nsstring *)tableName addColumns:(NSArray *)columns { for (int i=0; i<columns.count; i++) { LKDBProperty* p = [columns objectAtIndex:i]; if([p.propertyName isEqualToString:@"error"]) { [helper executeDB:^(FMDatabase *db) { Nsstring* sql = [NsstringstringWithFormat:@"update %@ set error = name",tableName]; [db executeUpdate:sql]; }]; } } }

13 set columnattribute (option)（设置列名）

+(void)columnAttributeWithProperty:(LKDBProperty *)property { if([property.sqlColumnName isEqualToString:@"MyAge"]) { property.defaultValue = @"15"; } if([property.propertyName isEqualToString:@"date"]) { property.isUnique = YES; property.checkValue = @"MyDate > '2000-01-01 00:00:00'"; property.length = 30; } }

四 详见Demo：5.1基于sqlite快速开发封装库

github地址：https://github.com/li6185377/LKDBHelper-sqlite-ORM