FMDB----SQL----数据库

#pragma mark -- 数库

- (void)createDatabase{

//路径

NSString *path = [NSString stringWithFormat:@"%@/Documents/maxueshan.db",NSHomeDirectory()];

//创建

_database = [[FMDatabase alloc]initWithPath:path];

//打开

[_database open];

NSLog(@"%@",path);

}

//重写析构方法   ,  不能写 [super dealloc]

- (void)dealloc{

//关闭数据库

[_database close];

}

#pragma mark -- 创建表格

- (void)createTable{

NSString *sql = @"create table if not exists Student(stuName text,stuAge text, stuSex text)";

BOOL isSuccess = [_database executeUpdate:sql];

if (isSuccess) {

NSLog(@"table表格创建成功");

}else {

NSLog(@"table表格创建失败");

}

}

//增

- (void)insertDataWithArray:(NSArray *)array{

if (array.count == 0) {

//数组为空,没有模型

return;

}

//1.SQL语句  拼接

NSString *sql = @"insert into Student values(?,?,?)";

//2.遍历数组

for (StudentModel *model in array) {

//

[_database executeUpdate:sql,model.stuName,model.stuAge,model.stuSex];

}

}

//删

- (void)deleteDataWithArray:(NSArray *)array{

if (array.count == 0) {

return ;

}

NSString *sql = @"delete from Student where stuName=? and stuAge=? and stuSex=?";

for (StudentModel *model in array) {

[_database executeUpdate:sql,model.stuName,model.stuAge,model.stuSex];

}

}

//改

- (BOOL)updateDataWithSourceModle:(StudentModel *)sourceModel andNewModel:(StudentModel *)newModel{

if (sourceModel && newModel) {

//两个模型都不为空时,才执行 数据的修改

NSString *sql = @"update Student set stuName=? , set stuAge=? , set stuSex=? where stuName=? and stuAge=? and stuSex=?";

BOOL isSuccess = [_database executeUpdate:sql,newModel.stuName,newModel.stuAge,newModel.stuSex,sourceModel.stuName,sourceModel.stuAge,sourceModel.stuSex];

return isSuccess;

}

return NO;

}

//查

- (NSArray *)selectAllDatas{

//1.数组,接收模型

NSMutableArray *dataArr = [NSMutableArray array];

//2.sql 语句

NSString *sql = @"select *from Student";

//3.查询

FMResultSet *set = [_database executeQuery:sql];

//4.遍历,分装模型

while ([set next]) {

NSString *name = [set stringForColumn:@"stuName"];

NSString *age  = [set stringForColumn:@"stuAge"];

NSString *sex  = [set stringForColumn:@"stuSex"];

NSDictionary *dic = @{@"stuName":name,@"stuAge":age,@"stuSex":sex};

StudentModel *model = [StudentModel createModelWithDic:dic];

[dataArr addObject:model];

}

return dataArr;

}

//姓名

- (NSArray *)selectForName:(NSString *)name {

if (name.length == 0) {

return nil;

}

NSMutableArray *dataArr = [NSMutableArray array];

NSString *sql = @"select * form Student where stuName=? ";

FMResultSet *set = [_database executeQuery:sql,name];

while ([set next]) {

NSString *name = [set stringForColumn:@"stuName"];

NSString *age = [set stringForColumn:@"stuAge"];

NSString *sex = [set stringForColumn:@"stuSex"];

NSDictionary *dic = @{@"stuName":name,@"stuAge":age,@"stuSex":sex};

StudentModel *model = [StudentModel createModelWithDic:dic];

[dataArr addObject:model];

}

return dataArr;

}