FMDB的简单使用

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>
/**
*  源代码的链接地址
*  链接: http://pan.baidu.com/s/1pKTxfyb 密码: eqa3
*
*/
@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
return YES;
}

@end

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

#import "ViewController.h"
#import "UIImage+CreatImageWithColor.h"
#import "LFPerson.h"
#import "LFFMDBOperation.h"
@interface ViewController ()

@property(nonatomic, strong) LFFMDBOperation *operation;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
NSArray *titles = @[@"增",@"删",@"改",@"查"];
//按钮的宽
float buttonW = 50;
//按钮的高
float buttonH = 40;
//间隙
float gap = 20;
//初始位置
float originX = ([UIScreen mainScreen].bounds.size.width - (gap+buttonW)*titles.count)/2.0;
//创建按钮
for (int i = 0; i < titles.count; i++) {
// 初始化button
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
//设置尺寸
button.frame = CGRectMake(originX+(gap+buttonW)*i, 100, buttonW, buttonH);
//添加标签号
button.tag = i;
//设置背景颜色
[button setBackgroundColor:[UIColor orangeColor]];
//设置标题
[button setTitle:titles[i] forState:UIControlStateNormal];
//设置字体的颜色
[button setTitleColor:[UIColor cyanColor] forState:UIControlStateNormal];
//设置选中时的背景图片
[button setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithRed:246/255.0 green:246/255.0 blue:246/255.0 alpha:0.45]] forState:UIControlStateHighlighted];

//添加监听事件
[button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
//添加到控制器的视图上
[self.view addSubview:button];
}

//初始化LFFMDBOperation
self.operation = [[LFFMDBOperation alloc] init];
//创表
[self.operation creatTableWithString:@"CREATE TABLE IF NOT EXISTS PERSON (id integer PRIMARY KEY AUTOINCREMENT, name text NOT NULL, age text NOT NULL, address text NOT NULL);" fileName:@"Person.sqlite"];
}

/**
*  按钮事件
*/
- (void)buttonAction:(UIButton *)sender{
//    NSLog(@"%ld",sender.tag);
switch (sender.tag) {
case 0:
{
LFPerson *person = [[LFPerson alloc] init];
person.name = @"GYL";
person.age = 25;
person.address = @"广东";
[self insertData:person];
}
break;
case 1:
{
LFPerson *person = [[LFPerson alloc] init];
person.identifier = 1;
person.name = @"GYL——";
person.age = 18;
person.address = @"湖北";
[self deleteDataWithPerson:person];

//删除所有的数据
//            [self deleteAllData];
}
break;
case 2:
{
LFPerson *person = [[LFPerson alloc] init];
person.identifier = 1;
person.name = @"GYL——";
person.age = 18;
person.address = @"湖北";
[self updateData:person];
}
break;
case 3:
[self queryData];
break;
default:
break;
}
}

/**
*  插入数据
*
*  @param person 插入的对象
*/
- (void)insertData:(LFPerson *)person{
//插入数据
[self.operation dealDataWithString:@"INSERT INTO PERSON (name,age,address) VALUES (%@,%@,%@)" andPerson:person];
}

/**
*  删除数据库
*/
- (void)deleteAllData{
[self.operation deleteAllDataWithString:@"DROP TABLE IF EXISTS PERSON;"];
//创表(删除表后，若不重新创建，则无法进行其他操作了，因为表不存在了)
[self.operation creatTableWithString:@"CREATE TABLE IF NOT EXISTS PERSON (id integer PRIMARY KEY AUTOINCREMENT, name text NOT NULL, age text NOT NULL, address text NOT NULL);" fileName:@"Person.sqlite"];
}

/**
*   删除某一条数据
*
*  @param person 被删除的对象
*/
- (void)deleteDataWithPerson:(LFPerson *)person{
[self.operation deleteOneDataWithString:@"DELETE FROM PERSON WHERE id = %@" andPerson:person];
}

/**
*  更新数据
*
*  @param person 更新的对象
*/
- (void)updateData:(LFPerson *)person{
[self.operation replaceDataWithString:@"UPDATE PERSON SET name = ?,age = ?, address = ? WHERE id = ?" andPerson:person];
}

// 将数据转成模型数据
- (NSArray *)changeToModelWithArray:(NSArray *)dataArr{
NSMutableArray *arr = [NSMutableArray array];
for (int i = 0; i < dataArr.count; i++) {
NSArray *array = [dataArr objectAtIndex:i];
// 转成对象
LFPerson *person = [[LFPerson alloc] init];
person.identifier = [array[0] intValue];
person.name = array[1];
person.age = [array[2] integerValue];
person.address = array[3];
[arr addObject:person];
}
return arr;
}

/**
*  查询数据
*/
- (void)queryData{
//将对象的属性名存入数组
NSArray *arr = @[@"name",@"age",@"address"];
//从数据库中进行查询操作
NSArray * array = [self.operation queryWithString:@"SELECT * FROM PERSON" paramaArray:arr];
//    NSLog(@"%@",array);
// 转成对象
NSArray * resultArr = [self changeToModelWithArray:array];
for (LFPerson *person in resultArr) {
NSLog(@"%ld-%@-%ld-%@",(long)person.identifier,person.name,(long)person.age,person.address);
}
}

@end

#import <UIKit/UIKit.h>

@interface UIImage (CreatImageWithColor)

/**
*  通过颜色生成该纯颜色的图片
*
*  @param color 生成图片的颜色
*
*  @return 返回图片
*/
+ (UIImage *)imageWithColor:(UIColor *)color;

/**
*  通过颜色生成该纯颜色的图片
*
*  @param color  生成图片的颜色
*  @param width  生成图片的宽
*  @param height 生成图片的高
*
*  @return 返回图片
*/
+ (UIImage *)imageWithColor:(UIColor *)color imageWidth:(CGFloat)width imageWithHeight:(CGFloat)height;

@end

#import "UIImage+CreatImageWithColor.h"

@implementation UIImage (CreatImageWithColor)

+ (UIImage *)imageWithColor:(UIColor *)color{
return [UIImage imageWithColor:color imageWidth:100 imageWithHeight:100];
}

+ (UIImage *)imageWithColor:(UIColor *)color imageWidth:(CGFloat)width imageWithHeight:(CGFloat)height{

//开启基于位图的图形上下文
UIGraphicsBeginImageContextWithOptions(CGSizeMake(width,height), NO, 0.0);
// 设置画笔的颜色
[color set];
// 画矩形，并填充
UIRectFill(CGRectMake(0, 0, width, height));
//获取图片
UIImage *resultImage = UIGraphicsGetImageFromCurrentImageContext();
//关闭上下文
UIGraphicsEndImageContext();

return resultImage;
}

@end

#import <Foundation/Foundation.h>

@interface LFPerson : NSObject

@property (nonatomic, assign) int identifier;// 对应主键号
@property (nonatomic, copy) NSString *name;//名字
@property (nonatomic, assign) NSInteger age;//年龄
@property (nonatomic, copy) NSString *address;//地址

@end

#import "LFPerson.h"

@implementation LFPerson

@end

#import <Foundation/Foundation.h>
@class LFPerson;
@interface LFFMDBOperation : NSObject

/**
*  创建表
*
*  @param SQLString SQL的命令语句
*  @param fileName  数据库的文件名
*
*  @return 返回BOOL值
*/
- (BOOL)creatTableWithString:(NSString *)SQLString fileName:(NSString*)fileName;

/**
*  增加数据
*
*  @param SQLString SQL的命令语句
*  @param params    相应的字段
*/
- (void)dealDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person;

/**
*  删除所有数据
*
*  @param SQLString SQL的删除命令语句
*/
- (void)deleteAllDataWithString:(NSString *)SQLString;

/**
*  删除某个对象
*
*  @param SQLString SQL的删除命令语句
*  @param person    删除的对象
*/
- (void)deleteOneDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person;

/**
*  更新数据
*
*  @param SQLString SQL的更新命令语句
*  @param person    更新的对象（更新的内容不包括主键）
*/
- (void)replaceDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person;

/**
*  查询
*
*  @param SQLString SQL的命令语句
*  @param params    相应的字段
*
*  @return 返回查询结果
*/
- (NSArray *)queryWithString:(NSString *)SQLString paramaArray:(NSArray *)params;
@end

#import "LFFMDBOperation.h"
#import "FMDB.h"
#import "LFPerson.h"
@interface LFFMDBOperation ()

@property(nonatomic, strong) FMDatabase *db;

@end

@implementation LFFMDBOperation

- (BOOL)creatTableWithString:(NSString *)SQLString fileName:(NSString*)fileName{
//获取数据库文件的路径
NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSString *dbFileName = [doc stringByAppendingPathComponent:fileName];
//获取数据库
FMDatabase *db = [FMDatabase databaseWithPath:dbFileName];

BOOL result = NO;
//打开数据库
if ([db open]) {
result = [db executeUpdate:SQLString];
if (result) {
NSLog(@"成功创表");
}else{
NSLog(@"创表失败");
}
}
self.db = db;
return result;
}

- (void)dealDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person{
[self.db executeUpdateWithFormat:SQLString,person.name,[NSString stringWithFormat:@"%ld",person.age],person.address];
}

- (void)deleteAllDataWithString:(NSString *)SQLString{
[self.db executeUpdate:SQLString];
}

- (void)deleteOneDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person{
[self.db executeUpdateWithFormat:SQLString,@(person.identifier)];
}

- (void)replaceDataWithString:(NSString *)SQLString andPerson:(LFPerson *)person{
[self.db executeUpdate:SQLString,person.name,@(person.age),person.address,@(person.identifier)];
}

- (NSArray *)queryWithString:(NSString *)SQLString paramaArray:(NSArray *)params{

//初始化数组（存放所有的查询结果）
NSMutableArray *resultArr = [NSMutableArray array];
//执行查询语句
FMResultSet *resutlSet = [self.db executeQuery:SQLString];
//遍历结果
while ([resutlSet next]) {
// 初始化数组，存放一个对象的所有字段
NSMutableArray *arr = [NSMutableArray array];
//主键
int ID = [resutlSet intForColumn:@"id"];
//建主键存入arr
[arr addObject:[NSNumber numberWithInt:ID]];
for (int i = 0; i < params.count; i++) {
// 取相应字段的数据存入arr
NSString *str = [resutlSet stringForColumn:params[i]];
// 将对象的每个字段添加到arr数组
[arr addObject:str];
}
// 将每一个对象数组arr（对象数组arr存放着对象所有的字段，以及主键）存入resultArr数组
[resultArr addObject:arr];
}
return resultArr;
}

@end