FMDB数据持久化收藏功能

第一 :
1 把FMDB的第三方拖入到工程里面创建DataModel 继承NSObject ,这个DataModel里面写的是解析的一些数据在整个FMDB里面属于表名在DataModel里面必须定义一个NSInterger 类型的classID 属于主键ID

@interface DataModel : NSObject

@property(nonatomic,strong)NSString *imgsrc,*title,*mtime,*url;

// 设置一个主键ID
@property(nonatomic , assign)NSInteger classID;

@end

下面是DataModel.m里面的方法：
-(void)setValue:(id)value forUndefinedKey:(NSString *)key{

}

第二:在定义一个Model类继承于NSObject 在Model类里面主要写了FMDB的一些增，删，改，查
首先在Model.h里面定义一些方法代码有：

#import <Foundation/Foundation.h>
#import “DataModel.h”
NS_ASSUME_NONNULL_BEGIN

@interface Model : NSObject

//单利方法
+(instancetype)initData;

//初始化数据库
-(void)initSql;
//初始化表格
-(void)initTable;

//添加从解析里面的数据添加到数据库里面所以是DataModel
-(void)addData:(DataModel *)data;

//删除
-(void)deletData:(NSInteger )theid;

//查询数据
-(NSMutableArray *)inquireArr;

//关闭数据库
-(void)closeSql;

@end

其次是Model.m里面的实现的一些方法

#import “Model.h”
#import “FMDatabase.h”
//创建静态变量

static Model *sql;
static FMDatabase *db;

@implementation Model

//初始化单利方法

+(instancetype)initData{
if (!sql) {
sql=[[Model alloc]init];

}
return sql;

}

//初始化数据库

-(void)initSql{

//获取Documents目录
NSString *str=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];

//拼接路径
NSString *fileName=[str stringByAppendingString:@"strmb.db"];

NSLog(@"%@",fileName);

//创建数据库
db=[[FMDatabase alloc]initWithPath:fileName];


if ([db open]) {
    NSLog(@"打开数据库成功");
    
    //初始化表格
    [self initTable];
}else{
    
    
    NSLog(@"打开数据库失败");
    
}

}

//初始化表格
-(void)initTable{
//初始化数据库表格的格式：create table if not exists 表名(主键id integer primary key,所有的数据类型); : 如果不存在DataModel(classID integer primary key,imgsrc blob,title text,url text)，则创建表

[db executeUpdate:@"create table if not exists DataModel(classID integer primary key,imgsrc blob,title text,url text,mtime text)"];
//关闭数据库
[db close];

}
//添加数据
-(void)addData:(DataModel *)data{
//添加数据的sql语句：insert into 表名 values(null,?,?);
if ([db open]) {
[db executeUpdate:[NSString stringWithFormat:@“insert into DataModel values(null,’%@’,’%@’,’%@’,’%@’)”,data.imgsrc,data.title,data.url,data.mtime]];
NSLog(@“插入成功”);

}else{
    NSLog(@"添加失败");
}
//关闭数据库
[db close];

}

//删除数据
-(void)deletData:(NSInteger)theid{

if ([db open]) {
    
      //sql 语句： delete from 表名 where 表名的主键id = ?
    [db executeUpdate:[NSString stringWithFormat:@"delete from DataModel where classID=%ld",theid]];
    NSLog(@"删除成功");
    
}else{
    NSLog(@"删除失败");
}
//关闭数据库
[db close];

}
//查询数据库
-(NSMutableArray *)inquireArr{

 //创建数据
NSMutableArray *arr=[NSMutableArray new];

//集合
FMResultSet *set=[FMResultSet new];

if ([db open]) {
    
    set=[db executeQuery:@"select *from DataModel"];
    //判断有没有东西
    
    while ([set next]) {
        
        DataModel *model=[[DataModel alloc]init];
        
        model.imgsrc=[set stringForColumn:@"imgsrc"];
        model.title=[set stringForColumn:@"title"];
        model.url=[set stringForColumn:@"url"];
        model.mtime = [set stringForColumn:@"mtime"];
        model.classID=[set intForColumn:@"classID"];
        [arr addObject:model];
        
        
    }
}else{
    NSLog(@"查询失败");
}
[db close];
return arr;

}

@end

第三:创建TableViewCell继承UITableViewCell 进行拖拽xib约束

在这里插入图片描述其次是拖拽到TableViewCell.h里面

#import <UIKit/UIKit.h>
#import “DataModel.h”
NS_ASSUME_NONNULL_BEGIN

@interface TableViewCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UIImageView *img;
@property (weak, nonatomic) IBOutlet UILabel *zhu;
@property (weak, nonatomic) IBOutlet UILabel *fu;

-(void)loadData:(DataModel *)mode;

然后在TableViewCell.m里面实现方法

-(void)loadData:(DataModel *)mode{

if (mode) {
    
    self.zhu.text=mode.title;
    self.fu.text=mode.mtime;
    self.img.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:mode.imgsrc]]];
    
    
}

}

第三：是在VC里面进行解析接口添加到表格里面

#import “ViewController.h”
#import <AFNetworking.h>
#import “TableViewCell.h”
#import “DataModel.h”
#import “oneViewController.h”
#import “twoViewController.h”

@interface ViewController ()<UITableViewDelegate,UITableViewDataSource>
@property(nonatomic,strong)UITableView *tab;
@property(nonatomic,strong)NSMutableArray *DATAsource;

@end

@implementation ViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.DATAsource=[[NSMutableArray alloc]init];

self.tab=[[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];
self.tab.delegate=self;
self.tab.dataSource=self;
self.navigationItem.title=@“好好学习”;
self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@“收藏界面” style:UIBarButtonItemStyleDone target:self action:@selector(click)];

[self.view addSubview:self.tab];
//注册
[self.tab registerNib:[UINib nibWithNibName:@“TableViewCell” bundle:nil] forCellReuseIdentifier:@“cell”];

[self AFN];
}
-(void)click{

twoViewController *two=[twoViewController new];

[self.navigationController pushViewController:two animated:YES];

}

-(void)AFN{

AFHTTPSessionManager *manger=[AFHTTPSessionManager manager];

manger.responseSerializer=[AFHTTPResponseSerializer serializer];

[manger GET:@"http://c.m.163.com/nc/article/list/T1348648517839/0-20.html" parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {
    
} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
    NSLog(@"请求成功");
    
    NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:responseObject options:1 error:nil];
    
    NSDictionary *arr=[dic objectForKey:@"T1348648517839"];
    
    for (NSDictionary *dic in arr) {
        
        DataModel *model=[DataModel new];
        
        [model setValuesForKeysWithDictionary:dic];
        
        [self.DATAsource addObject:model];
        
    }
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tab reloadData];
    });
    
    
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    
    NSLog(@"请求失败");
    
}];

}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

return self.DATAsource.count;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

TableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"cell"];

//
//
// if (cell==nil) {
// cell=[[TableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:oj];
// }

DataModel *model=self.DATAsource[indexPath.row];
self.tab.rowHeight=150;

cell.zhu.text=model.title;
cell.fu.text=model.mtime;
cell.img.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:model.imgsrc]]];



return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

oneViewController *one=[oneViewController new];


one.model= self.DATAsource[indexPath.row];


[self.navigationController pushViewController:one animated:YES];

}

@end

其次创建OneVC

在OneVC.h里面
引入 DataModel.h 进行属性传值

#import <UIKit/UIKit.h>
#import “DataModel.h”
NS_ASSUME_NONNULL_BEGIN

@interface oneViewController : UIViewController
@property(nonatomic,strong)DataModel *model;

@end

其次在OneVC.m里面写网页视图点击收藏显示添加成功

#import “oneViewController.h”
#import <WebKit/WebKit.h>
#import “Model.h”

@interface oneViewController ()
@property(nonatomic,strong)WKWebView *webview;
@end

@implementation oneViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.

self.webview=[[WKWebView alloc]initWithFrame:self.view.frame];

self.navigationItem.title=@“网页视图”;
self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@“收藏” style:UIBarButtonItemStyleDone target:self action:@selector(click)];

[self.webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",self.model.url]]]];

[self.view addSubview:self.webview];

}

-(void)click{

[[Model initData]initSql];

[[Model initData]addData:self.model];

}
@end

最后一步创建TwoVC 是收藏的界面里面显示收藏成功的数据和一些删除数据的展示在这里还可以运用自定义cell直接赋值注册cell

#import “twoViewController.h”
#import “Model.h”
#import “TableViewCell.h”
@interface twoViewController ()<UITableViewDelegate,UITableViewDataSource>
@property(nonatomic,strong)UITableView *tab;
@property(nonatomic,strong)NSMutableArray *arr;

@end

@implementation twoViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.

self.tab=[[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];

self.tab.delegate=self;
self.tab.dataSource=self;
[self.view addSubview:self.tab];
//注册cell
[self.tab registerNib:[UINib nibWithNibName:@“TableViewCell” bundle:nil] forCellReuseIdentifier:@“cell”];

self.arr=[[NSMutableArray alloc]init];

}

-(void)viewWillAppear:(BOOL)animated{

[[Model initData]initSql];

self.arr=[[Model initData]initeArr];

[self.tab reloadData];

}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

return self.arr.count;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

static NSString *oj=@"cell";

TableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:oj];


DataModel *model=self.arr[indexPath.row];
self.tab.rowHeight=150;

cell.zhu.text=model.title;
cell.fu.text=model.mtime;
cell.img.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:model.imgsrc]]];


return cell;

}

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{

[[Model initData]initSql];


[[Model initData]deletData:[self.arr[indexPath.row]classID]];

[self.arr removeObject:self.arr[indexPath.row]];
[self.tab reloadData];

}

@end

FMDB数据持久化收藏功能

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