iOS UI 18 数据库

//

// RootViewController.m

// Ui - 18 数据库

//

// Created by dllo on 15/12/2.

// Copyright (c) 2015年 dllo. All rights reserved.

//

#import "RootViewController.h"

#import "DataBasehandle.h"

#import "Student.h"

@interface
RootViewController ()

@property (retain,
nonatomic) IBOutlet
UIButton *button;

@property (retain,
nonatomic) IBOutlet
UIButton *button1;

@property (retain,
nonatomic) IBOutlet
UIButton *button2;

@property (retain,
nonatomic) IBOutlet
UIButton *button3;

@property (retain,
nonatomic) IBOutlet
UIButton *insert;

@property (retain,
nonatomic) IBOutlet
UIButton *updat;

@property (retain,
nonatomic) IBOutlet
UIButton *deleteda;

@property (retain,
nonatomic) IBOutlet
UIButton *button4;

@property (retain,
nonatomic) IBOutlet
UIButton *button5;

@end

@implementation RootViewController

- (void)viewDidLoad {

[super
viewDidLoad];

NSLog(@"%@",NSHomeDirectory());

// Do any additional setup after loading the view from its nib.

}

//打开数据库

- (IBAction)button:(id)sender {

[[DataBasehandle
sharedDatabase] openDB];

}

//关闭数据库

- (IBAction)button1:(id)sender {

[[DataBasehandle
sharedDatabase] closeDB];

}

//创建表单

- (IBAction)button2:(id)sender {

[[DataBasehandle
sharedDatabase] createTable];

}

//删除表单

- (IBAction)button3:(id)sender {

[[DataBasehandle
sharedDatabase] deleteTable];

}

//插入数据

- (IBAction)insert:(id)sender {

Student *stu = [[Student
alloc]init];

stu.name = @"dfsa";

stu.sex = @"fdsf";

stu.age = 1;

[[DataBasehandle
sharedDatabase] insertDataWithStudent:stu];

}

//修改数据

- (IBAction)updat:(id)sender {

Student *stu = [[Student
alloc]init];

stu.name = @"小平好帅";

stu.sex = @"男";

stu.age = 100;

[[DataBasehandle
sharedDatabase] updataWithNumber:4
Student:stu];

}

//删除数据

- (IBAction)deleteda:(id)sender {

[[DataBasehandle
sharedDatabase] deleteDataWithNumber:2];

}

//查询所有数据

- (IBAction)button4:(id)sender {

NSMutableArray *stuArr = [[DataBasehandle
sharedDatabase] selectAllStudent];

for (Student *stu
in stuArr) {

NSLog(@"%@ %@ %ld", stu.name, stu.sex, stu.age);

}

}

- (IBAction)button5:(id)sender {

NSMutableArray *stuArr = [[DataBasehandle
sharedDatabase]selectBySexOfStudent:@"男"
name:@"小平好帅"];

for (Student *stu
in stuArr) {

NSLog(@"%@ %@ %ld", stu.name, stu.sex, stu.age);

}

}

- (void)didReceiveMemoryWarning {

[super
didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

// Get the new view controller using [segue destinationViewController].

// Pass the selected object to the new view controller.

}

*/

- (void)dealloc {

[_button
release];

[_button1
release];

[_button2
release];

[_button3
release];

[_insert
release];

[_updat
release];

[_deleteda
release];

[_button4
release];

[_button5
release];

[super dealloc];

}

@end

//

// DataBasehandle.h

// Ui - 18 数据库

//

// Created by dllo on 15/12/2.

// Copyright (c) 2015年 dllo. All rights reserved.

//

#import <Foundation/Foundation.h>

@class Student;

@interface DataBasehandle :
NSObject

+(instancetype)sharedDatabase;

- (void)openDB;

- (void)closeDB;

- (void)createTable;

- (void)deleteTable;

- (void)insertDataWithStudent:(Student *)stu;

- (void)deleteDataWithNumber:(NSInteger)num;

- (void)updataWithNumber:(NSInteger)num Student:(Student *)stu;

- (NSMutableArray *)selectAllStudent;

- (NSMutableArray *)selectBySexOfStudent:(NSString *)sex name :(NSString *)name;

@end

//

// DataBasehandle.m

// Ui - 18 数据库

//

// Created by dllo on 15/12/2.

// Copyright (c) 2015年 dllo. All rights reserved.

//

#import "DataBasehandle.h"

#import "Student.h"

#import <sqlite3.h>

@implementation DataBasehandle

+(instancetype)sharedDatabase

{

static DataBasehandle *dataBase =
nil;

if (nil == dataBase) {

dataBase = [[DataBasehandle
alloc]init];

}

return dataBase;

}

static sqlite3 *DB =
nil;

//sql指令(以Student举例):

//

//创建表单 : @"CREATE TABLE IF NOT EXISTS student(number integer PRIMARY KEY AUTOINCREMENT, name TEXT, sex TEXT, age integer)"

//

//删除表单 : @"DROP TABLE student"

//

//插入数据 : @"INSERT INTO student(name, sex, age) VALUES ('%@', '%@', '%ld')", stu.name, stu.sex, stu.age

//

//删除数据 : @"DELETE FROM student WHERE number = '%ld'", num

//

//修改数据(按num) : @"UPDATE student SET name = '%@', sex = '%@', age = '%ld' WHERE number = '%ld'", stu.name, stu.sex, stu.age,
num

//

//查询所有数据 : SELECT * FROM student

//

//按分类查找(按sex) : @"SELECT * FROM student WHERE sex LIKE '%%%@%%'", sex

- (void)openDB

{

NSString *path = [NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask,
YES)lastObject];

NSString *filepath = [path
stringByAppendingPathComponent:@"dataBase.db"];

//打开数据库

//注意将文件路径转为c语言识别的字符串类型

int ret = sqlite3_open(filepath.UTF8String, &DB);

if (SQLITE_OK == ret) {

NSLog(@"打开数据库成功");

} else {

NSLog(@"打开数据库失败");

}

}

- (void)closeDB

{

int ret =
sqlite3_close(DB);

if (SQLITE_OK == ret) {

NSLog(@"关闭数据库成功");

} else {

NSLog(@"关闭数据库失败");

}

}

- (void)createTable

{

NSString *sqlStr =
@"CREATE TABLE IF NOT EXISTS student(number integer PRIMARY KEY AUTOINCREMENT, name TEXT, sex TEXT, age integer)";

int ret = sqlite3_exec(DB, sqlStr.UTF8String,
NULL, NULL,
NULL);

if (SQLITE_OK == ret) {

NSLog(@"创建表单成功");

} else {

NSLog(@"创建表单失败");

}

}

- (void)deleteTable

{

NSString *sqlStr =
@"DROP TABLE student";

int ret = sqlite3_exec(DB, sqlStr.UTF8String,
NULL, NULL,
NULL);

if (SQLITE_OK == ret) {

NSLog(@"删除表单成功");

} else {

NSLog(@"删除表单失败");

}

}

- (void)insertDataWithStudent:(Student *)stu

{

NSString *sqlStr = [NSString
stringWithFormat:@"INSERT INTO student(name, sex, age) VALUES ('%@', '%@', '%ld')", stu.name,
stu.sex, stu.age];

int ret = sqlite3_exec(DB, sqlStr.UTF8String,
NULL, NULL,
NULL);

if (SQLITE_OK == ret) {

NSLog(@"插入数据成功");

} else {

NSLog(@"插入数据失败");

}

}

- (void)deleteDataWithNumber:(NSInteger)num

{

NSString *sqlstr = [NSString
stringWithFormat:
@"DELETE FROM student WHERE number = '%ld'", num];

int ret = sqlite3_exec(DB, sqlstr.UTF8String,
NULL, NULL,
NULL);

if (SQLITE_OK == ret) {

NSLog(@"删除数据成功");

} else {

NSLog(@"删除数据失败");

}

}

- (void)updataWithNumber:(NSInteger)num Student:(Student *)stu

{

NSString *sqlstr = [NSString
stringWithFormat:
@"UPDATE student SET name = '%@', sex = '%@', age = '%ld' WHERE number = '%ld'", stu.name, stu.sex,
stu.age, num];

int ret = sqlite3_exec(DB, sqlstr.UTF8String,
NULL, NULL,
NULL);

if (SQLITE_OK == ret) {

NSLog(@"修改数据成功");

} else {

NSLog(@"修改数据失败");

}

}

- (NSMutableArray *)selectAllStudent

{

NSString *sqlstr =
@"SELECT * FROM student";

sqlite3_stmt *stmt =
nil;

int ret = sqlite3_prepare_v2(DB, sqlstr.UTF8String, -1, &stmt,
NULL);

if (SQLITE_OK == ret) {

NSMutableArray *arr = [NSMutableArray
array];

//判断是否还有有效数据

while (SQLITE_ROW ==
sqlite3_step(stmt)) {

//参数:列数

const unsigned
char *name = sqlite3_column_text(stmt, 1);

const
unsigned char *sex =
sqlite3_column_text(stmt, 2);

sqlite3_int64 age =
sqlite3_column_int(stmt, 3);

Student *stu = [[Student
alloc]init];

// stu.name = name;

stu.name = [NSString
stringWithUTF8String:(const
char *)name];

stu.sex = [NSString
stringWithUTF8String:(const
char *)sex];

//整型可以直接强转

stu.age = (NSInteger)age;

[arr addObject:stu];

[stu release];

}

return arr;

} else {

NSLog(@"获取数据失败");

return nil;

}

}

- (NSMutableArray *)selectBySexOfStudent:(NSString *)sex name:(NSString *)name

{

NSString *sqlstr = [NSString
stringWithFormat:
@"SELECT * FROM student WHERE sex LIKE '%%%@%%' and name = '%@'", sex, name ];

sqlite3_stmt *stmt =
nil;

int ret = sqlite3_prepare_v2(DB, sqlstr.UTF8String, -1, &stmt,
NULL);

if (SQLITE_OK == ret) {

NSMutableArray *arr = [NSMutableArray
array];

//判断是否还有有效数据

while (SQLITE_ROW ==
sqlite3_step(stmt)) {

//参数:列数

const
unsigned char *name =
sqlite3_column_text(stmt, 1);

const
unsigned char *sex =
sqlite3_column_text(stmt, 2);

sqlite3_int64 age =
sqlite3_column_int(stmt, 3);

Student *stu = [[Student
alloc]init];

// stu.name = name;

stu.name = [NSString
stringWithUTF8String:(const
char *)name];

stu.sex = [NSString
stringWithUTF8String:(const
char *)sex];

//整型可以直接强转

stu.age = (NSInteger)age;

[arr addObject:stu];

[stu release];

}

return arr;

} else {

NSLog(@"获取数据失败");

return nil;

}

}

@end

//

// Student.h

// Ui - 18 数据库

//

// Created by dllo on 15/12/2.

// Copyright (c) 2015年 dllo. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface Student :
NSObject

@property (nonatomic,
copy)NSString *name;

@property (nonatomic,
copy)NSString *sex;

@property (nonatomic,
assign)NSInteger age;

@end

//

// Student.m

// Ui - 18 数据库

//

// Created by dllo on 15/12/2.

// Copyright (c) 2015年 dllo. All rights reserved.

//

#import "Student.h"

@implementation Student

- (void)dealloc

{

[_name
release];

[_sex release];

[super dealloc];

}

@end