//

//  RootViewController.m

//  coreDate 简化版

#import "RootViewController.h"

#import "entity.h"

#import "AppDelegate.h"

@interface RootViewController ()

{

    UILabel *label;

    NSInteger number;

    NSDictionary *Dic;

    NSMutableArray *arr;

    UILabel *age;

    BOOL isFirst;

}

@end

@implementation RootViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    isFirst=NO;

    Dic=[[NSDictionary alloc]initWithObjectsAndKeys:@"one",@"",@"two",@"", nil];

    arr=[NSMutableArray arrayWithObjects:@"少年",@"青年",@"老年", nil];

    number=;

    label=[[UILabel alloc]initWithFrame:CGRectMake(, , ,)];

    label.font=[UIFont systemFontOfSize:];

    label.textAlignment=NSTextAlignmentCenter;

    label.text=@"test";

    label.tag=;

    label.backgroundColor=[UIColor cyanColor];

    age=[[UILabel alloc]initWithFrame:CGRectMake(, , ,)];

    age.font=[UIFont systemFontOfSize:];

    age.textAlignment=NSTextAlignmentCenter;

    age.text=@"";

    age.tag=;

    age.backgroundColor=[UIColor cyanColor];

    [self insertCoreData];

    [self dataFetchRequest];

    UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];

    btn.frame=CGRectMake(, , , );

    [btn setTitle:@"删除" forState:UIControlStateNormal];

    btn.backgroundColor=[UIColor purpleColor];

    [btn addTarget:self action:@selector(delete) forControlEvents:UIControlEventTouchUpInside];

    UIButton *btn1=[UIButton buttonWithType:UIButtonTypeCustom];

    btn1.frame=CGRectMake(, , , );

    [btn1 setTitle:@"查找" forState:UIControlStateNormal];

    btn1.backgroundColor=[UIColor purpleColor];

    [btn1 addTarget:self action:@selector(seek) forControlEvents:UIControlEventTouchUpInside];

    UIButton *btn2=[UIButton buttonWithType:UIButtonTypeCustom];

    btn2.frame=CGRectMake(, , , );

    [btn2 setTitle:@"增加" forState:UIControlStateNormal];

    btn2.backgroundColor=[UIColor purpleColor];

    [btn2 addTarget:self action:@selector(insertCoreData) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn1];

    [self.view addSubview:btn];

    [self.view addSubview:btn2];

    [self.view addSubview:label];

    [self.view addSubview:age];

}

-(void)seek

{

    UIApplication * application = [UIApplication sharedApplication];

    //默认appDelegate就是UIApplication的代理

    AppDelegate * delegate = application.delegate;

    NSManagedObjectContext *context = [delegate managedObjectContext];

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

    NSEntityDescription *ent = [NSEntityDescription entityForName:@"Entity" inManagedObjectContext:context];

    [fetchRequest setEntity:ent];

    NSError *error;

    NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];

    if (![fetchedObjects count]) {

        NSLog(@"fetchedObjects 已全部删除");

    }

    for (entity *info in fetchedObjects) {

        NSLog(@"count:%ld",(unsigned long)[fetchedObjects count]);

        //adress字典查找

        NSString *jsonStringDic=[[NSString alloc]initWithFormat:@"%@",info.address];

        //字符串转化成data类型

        NSData *dataDic=[jsonStringDic dataUsingEncoding:NSUTF8StringEncoding];

        NSError *errDic;

        //将data类型转化成字典

        id jsonObjectDic = [NSJSONSerialization JSONObjectWithData:dataDic

                                                        options:NSJSONReadingAllowFragments

                                                          error:&errDic];

        //根据key进行查找

        label.text=[jsonObjectDic objectForKey:@""];

        //age 数组查找

        NSString *jsonStringArr=[[NSString alloc]initWithFormat:@"%@",info.age];

        NSData *dataArr=[jsonStringArr dataUsingEncoding:NSUTF8StringEncoding];

        NSError *errArr;

        id jsonObjectArr=[NSJSONSerialization JSONObjectWithData:dataArr options:NSJSONReadingAllowFragments error:&errArr];

        age.text=[jsonObjectArr objectAtIndex:];

        NSLog(@"***************age.text0=%@",jsonObjectArr[]);

        NSLog(@"***************age.text1=%@",jsonObjectArr[]);

        NSLog(@"***************age.text3=%@",jsonObjectArr[]);

    }

}

-(void)delete

{

    UIApplication * application = [UIApplication sharedApplication];

    //默认appDelegate就是UIApplication的代理

    AppDelegate * delegate = application.delegate;

    NSManagedObjectContext *context = [delegate managedObjectContext];

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

    NSEntityDescription *ent = [NSEntityDescription entityForName:@"Entity" inManagedObjectContext:context];

    [fetchRequest setEntity:ent];

    NSError *error;

    NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];

    for (entity *info in fetchedObjects) {

        NSLog(@"%@",info);

        //删除  整体都会删除

        [context deleteObject:info];

    }

    number ++;

    //coredata 数据保存

    if ([context save:&error]) {

        //更新成功

        NSLog(@"更新成功");

    }

}

-(void)insertCoreData

{

    if (isFirst) {

        UIApplication * application = [UIApplication sharedApplication];

        //默认appDelegate就是UIApplication的代理

        AppDelegate * delegate = application.delegate;

        NSManagedObjectContext *context = [delegate managedObjectContext];

        entity *entity = [NSEntityDescription insertNewObjectForEntityForName:@"Entity" inManagedObjectContext:context];

        entity.name = @"test";

        NSError *errDic;

        //字典转化成data类型，再转化成string进行保存

        //注意：是 NSData 不是 NSDate(时间)

        NSData *dataDic=[NSJSONSerialization dataWithJSONObject:Dic options:NSJSONWritingPrettyPrinted error:&errDic];

        NSString *jsonString=[[NSString alloc]initWithData:dataDic encoding:NSUTF8StringEncoding];

        entity.address=jsonString;

        //保存数组

        NSError *errArr;

        NSData *dataArr=[NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:&errArr];

        NSString *jsonArr=[[NSString alloc]initWithData:dataArr encoding:NSUTF8StringEncoding];

        entity.age=jsonArr;

        NSError *error;

        if(![context save:&error])

        {

            NSLog(@"不能保存：%@",[error localizedDescription]);

        }

    }

    else

    {

        isFirst=YES;

    }

}@end